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Re: [bmw e28] "Stutter"___528i,_Manual,__1985, £126k

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  • Steve Austin
    Thanks Ian. The transfer pump is original, so with £126k on the clock and having fitted a new main pump last year, I ll try that first. Cheers -- Paul ...
    Message 1 of 3 , Aug 31, 2004
      Thanks Ian. The transfer pump is original, so with �126k on the clock and
      having fitted a new main pump last year, I'll try that first. Cheers --
      Paul


      >From: iain@...
      >Reply-To: bmwe28@...
      >To: bmwe28@...
      >Subject: Re: [bmw e28] "Stutter"___528i,_Manual,__1985, �126k Date: Tue,
      >31 Aug 2004 09:44:05 +0100
      >
      >If you find that repairing your transfer pump doesn't solve the problem
      >take
      >another look at your Air Flow Meter, these are a dreadfully unreliable part
      >and movement of the internal flap doesn't always indacate that its working
      >properly. The movement of the flap caused by manifold vacuum in tern moves
      >a
      >wiper arm housed in the black platic casing on top of the AFM, this arm
      >wipes
      >over a copper track to then give a reading to the ECU of how much air is
      >coming in. If this copper track is coroded or dirty then incorrect
      >readings
      >are sent. And if you are getting your stuttering symptoms at roughly the
      >same
      >depression of the throttle each time then a certain part of the track could
      >be
      >worn / dirty.
      >
      >Many people are of the opinion that the track can be cleaned to improve
      >things
      >but I wouldn't recommend it, many an AFM have been killed off completely
      >when
      >tring this.
      >
      >Ideally you would put a known good AFM in your car and see if that solves
      >your
      >problem.
      >
      >If you don't have acess to one then you could buy a new or reconditioned
      >one.
      > www.gsfcarparts.com specialise in these to some extent but they don't
      >come
      >cheap. I would bet you won't see any change out of �125 for a recon.
      >
      >Iain
      >
      >"Steve Austin" <steveaustin1@...> wrote:
      >
      > > Ron, Thanks once again. I live in England, we don't get 120F
      > > temeperatures: -120F maybe! The "Vega trick" - I take it is a reference
      >to
      > > a cheaper part. I'll see if there are any distributors over here, but
      >do
      > > you have any more details. Eg Make, Model, etc.. Cheers. --Paul. (PS.
      > > Ordered the diff oil from redline you recommended by the way. Will get
      >that
      > > changed tomorrow)
      > >
      > >
      > > >From: Ron Kall <ronjkall@...>
      > > >Reply-To: bmwe28@...
      > > >To: bmwe28@...
      > > >Subject: Re: [bmw e28] "Stutter"___528i,_Manual,__1985,__�126k_
      > > >Date: Mon, 30 Aug 2004 16:28:29 -0700 (PDT)
      > > >
      > > >Paul,
      > > >
      > > >It's the transfer pump. Try running up a 4,000 foot
      > > >mountain at 6% grade and outside temperature at 120F.
      > > >If it vapor locks before you get all the way to the
      > > >top, then it's the transfer pump. Do the vega pump
      > > >trick. It's only $30.00, USD of course. There are
      > > >instructions online to see the fix. Search yahoo for
      > > >the pix and detailed instructions.
      > > >
      > > >
      > > >--- bty821185 <steveaustin1@...> wrote:
      > > >
      > > > > For the last two years I've had a problem that
      > > > > doesn't cause me too
      > > > > many headaches, because of the way I drive and the
      > > > > relatively few
      > > > > miles per year I do, but I'd sure like to cure it.
      > > > > When travelling
      > > > > at a CONSTANT speed (eg 35mph in 4th, 20mph in 3rd,
      > > > > etc... but does
      > > > > not seem to happen after, say, 55/60mph in 5th)I get
      > > > > what can only be
      > > > > described as a "stutter" or part surge. The RPM
      > > > > gauge doesn't move
      > > > > and I have no hesitation when accelerating or
      > > > > decelerating. But I get
      > > > > the feeling that fuel is not getting through
      > > > > properly. Last week
      > > > > changed fuel filter again. 6k miles ago: New
      > > > > fuses, cleaned main
      > > > > grounds with Detoxit contact cleaner, New Main Fuel
      > > > > Pump, Fuel Pump
      > > > > relay, Fuel Filter, Fuel Pressure Regulator, and ran
      > > > > a bottle of
      > > > > redlne SI 1 injector and valve cleaner through fuel.
      > > > > Also, at same
      > > > > time: new Cap, rotor, leads, plugs, air filter, oil
      > > > > filter and oil
      > > > > change. Recently run another bottle of SI-1
      > > > > injector cleaner
      > > > > through, and New Oil/filter change, Valve
      > > > > Adjustment, Air filter,
      > > > > plugs checked (perfect), Air flow sensor flap
      > > > > checked for binding
      > > > > (OK), Wynn's Injector/Carburettor Cleaner sprayed
      > > > > into
      > > > > intake/throttle body as per instructions on can.
      > > > > Can anyone suggest
      > > > > solution or a list, in priority order, of things
      > > > > to check. Could
      > > > > it be Transfer Pump? Partially restricted fuel
      > > > > lines? Throttle
      > > > > position switch? ECU? FIO> This car uses the L
      > > > > Jetronic system, there
      > > > > is no Oxygen Sensor and no EVAP (charcoal cannister)
      > > > > control. --
      > > > > cheers. Paul
      > > > >
      > > > >
      > > >
      > > >
      > > >=====
      > > >Ron Kall
      > > >Rancho Cucamonga, CA 91730
      > > >
      > > >
      > > >1986 528e
      > > >1985 535i
      > > >
      > > >
      > > >
      > > >__________________________________
      > > >Do you Yahoo!?
      > > >Yahoo! Mail - 50x more storage than other providers!
      > > >http://promotions.yahoo.com/new_mail
      > >
      > > _________________________________________________________________
      > > It's fast, it's easy and it's free. Get MSN Messenger today!
      > > http://www.msn.co.uk/messenger
      > >
      > >
      > >
      > > To unsubscribe from this group, send an email to:
      > > bmwe28-unsubscribe@...
      > >
      > >
      > > Yahoo! Groups Links
      > >
      > >
      > >
      > >
      > >
      > >
      >
      >
      >

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    • jim845034
      Hi - have been watching this thread but rarely reply My 1985 528i was working well, but in checking round found that the transfer pump wasn t working. I
      Message 2 of 3 , Sep 1, 2004
        Hi - have been watching this thread but rarely reply

        My 1985 528i was working well, but in checking round found that the
        transfer pump wasn't working. I fitted a replacement at 150GBP
        (over $200) BUT IT MADE ABSOLUTELY NO DIFFERENCE TO ANYTHING.

        I think the transfer pump was mainly for hot countries or where there
        had been some drain-down of the main fuel system. I disconnected my
        nice new pump - and the only change I could detect was that I lost
        the continual whining noise from the pump.

        The fuel regulator (sits on top of the engine at the end of the fuel
        rail) does have a major effect on these cars however - a new one is
        fairly cheap - 50GBP from BMW dealer. See Bentley for checks of
        pressures and bleed-down etc. Mine failed and gave confusing
        indications for a while.

        This it what I found - no guarantee of course ! Just thoughts before
        you shell out !

        Regards from Jim Butterworth
        1985 528i SE auto
        1989 318i auto



        --- In bmwe28@..., "Steve Austin" <steveaustin1@h...>
        wrote:
        > Thanks Ian. The transfer pump is original, so with £126k on the
        clock and
        > having fitted a new main pump last year, I'll try that first.
        Cheers --
        > Paul
        >
        >
        > >From: iain@5...
        > >Reply-To: bmwe28@...
        > >To: bmwe28@...
        > >Subject: Re: [bmw e28] "Stutter"___528i,_Manual,__1985, £126k
        Date: Tue,
        > >31 Aug 2004 09:44:05 +0100
        > >
        > >If you find that repairing your transfer pump doesn't solve the
        problem
        > >take
        > >another look at your Air Flow Meter, these are a dreadfully
        unreliable part
        > >and movement of the internal flap doesn't always indacate that its
        working
        > >properly. The movement of the flap caused by manifold vacuum in
        tern moves
        > >a
        > >wiper arm housed in the black platic casing on top of the AFM,
        this arm
        > >wipes
        > >over a copper track to then give a reading to the ECU of how much
        air is
        > >coming in. If this copper track is coroded or dirty then
        incorrect
        > >readings
        > >are sent. And if you are getting your stuttering symptoms at
        roughly the
        > >same
        > >depression of the throttle each time then a certain part of the
        track could
        > >be
        > >worn / dirty.
        > >
        > >Many people are of the opinion that the track can be cleaned to
        improve
        > >things
        > >but I wouldn't recommend it, many an AFM have been killed off
        completely
        > >when
        > >tring this.
        > >
        > >Ideally you would put a known good AFM in your car and see if that
        solves
        > >your
        > >problem.
        > >
        > >If you don't have acess to one then you could buy a new or
        reconditioned
        > >one.
        > > www.gsfcarparts.com specialise in these to some extent but they
        don't
        > >come
        > >cheap. I would bet you won't see any change out of £125 for a
        recon.
        > >
        > >Iain
        > >
        > >"Steve Austin" <steveaustin1@h...> wrote:
        > >
        > > > Ron, Thanks once again. I live in England, we don't get 120F
        > > > temeperatures: -120F maybe! The "Vega trick" - I take it is a
        reference
        > >to
        > > > a cheaper part. I'll see if there are any distributors over
        here, but
        > >do
        > > > you have any more details. Eg Make, Model, etc.. Cheers. --
        Paul. (PS.
        > > > Ordered the diff oil from redline you recommended by the way.
        Will get
        > >that
        > > > changed tomorrow)
        > > >
        > > >
        > > > >From: Ron Kall <ronjkall@y...>
        > > > >Reply-To: bmwe28@...
        > > > >To: bmwe28@...
        > > > >Subject: Re: [bmw e28] "Stutter"___528i,_Manual,__1985,__£126k_
        > > > >Date: Mon, 30 Aug 2004 16:28:29 -0700 (PDT)
        > > > >
        > > > >Paul,
        > > > >
        > > > >It's the transfer pump. Try running up a 4,000 foot
        > > > >mountain at 6% grade and outside temperature at 120F.
        > > > >If it vapor locks before you get all the way to the
        > > > >top, then it's the transfer pump. Do the vega pump
        > > > >trick. It's only $30.00, USD of course. There are
        > > > >instructions online to see the fix. Search yahoo for
        > > > >the pix and detailed instructions.
        > > > >
        > > > >
        > > > >--- bty821185 <steveaustin1@h...> wrote:
        > > > >
        > > > > > For the last two years I've had a problem that
        > > > > > doesn't cause me too
        > > > > > many headaches, because of the way I drive and the
        > > > > > relatively few
        > > > > > miles per year I do, but I'd sure like to cure it.
        > > > > > When travelling
        > > > > > at a CONSTANT speed (eg 35mph in 4th, 20mph in 3rd,
        > > > > > etc... but does
        > > > > > not seem to happen after, say, 55/60mph in 5th)I get
        > > > > > what can only be
        > > > > > described as a "stutter" or part surge. The RPM
        > > > > > gauge doesn't move
        > > > > > and I have no hesitation when accelerating or
        > > > > > decelerating. But I get
        > > > > > the feeling that fuel is not getting through
        > > > > > properly. Last week
        > > > > > changed fuel filter again. 6k miles ago: New
        > > > > > fuses, cleaned main
        > > > > > grounds with Detoxit contact cleaner, New Main Fuel
        > > > > > Pump, Fuel Pump
        > > > > > relay, Fuel Filter, Fuel Pressure Regulator, and ran
        > > > > > a bottle of
        > > > > > redlne SI 1 injector and valve cleaner through fuel.
        > > > > > Also, at same
        > > > > > time: new Cap, rotor, leads, plugs, air filter, oil
        > > > > > filter and oil
        > > > > > change. Recently run another bottle of SI-1
        > > > > > injector cleaner
        > > > > > through, and New Oil/filter change, Valve
        > > > > > Adjustment, Air filter,
        > > > > > plugs checked (perfect), Air flow sensor flap
        > > > > > checked for binding
        > > > > > (OK), Wynn's Injector/Carburettor Cleaner sprayed
        > > > > > into
        > > > > > intake/throttle body as per instructions on can.
        > > > > > Can anyone suggest
        > > > > > solution or a list, in priority order, of things
        > > > > > to check. Could
        > > > > > it be Transfer Pump? Partially restricted fuel
        > > > > > lines? Throttle
        > > > > > position switch? ECU? FIO> This car uses the L
        > > > > > Jetronic system, there
        > > > > > is no Oxygen Sensor and no EVAP (charcoal cannister)
        > > > > > control. --
        > > > > > cheers. Paul
        > > > > >
        > > > > >
        > > > >
        > > > >
        > > > >=====
        > > > >Ron Kall
        > > > >Rancho Cucamonga, CA 91730
        > > > >
        > > > >
        > > > >1986 528e
        > > > >1985 535i
        > > > >
        > > > >
        > > > >
        > > > >__________________________________
        > > > >Do you Yahoo!?
        > > > >Yahoo! Mail - 50x more storage than other providers!
        > > > >http://promotions.yahoo.com/new_mail
        > > >
        > > >
        _________________________________________________________________
        > > > It's fast, it's easy and it's free. Get MSN Messenger today!
        > > > http://www.msn.co.uk/messenger
        > > >
        > > >
        > > >
        > > > To unsubscribe from this group, send an email to:
        > > > bmwe28-unsubscribe@...
        > > >
        > > >
        > > > Yahoo! Groups Links
        > > >
        > > >
        > > >
        > > >
        > > >
        > > >
        > >
        > >
        > >
        >
        > _________________________________________________________________
        > Use MSN Messenger to send music and pics to your friends
        > http://www.msn.co.uk/messenger
      • Ron Kall
        As an add on, I noticed a difference in starting the car after I put in the new pump. The Vega pump works just as well as the OEM one and only costs $30.00
        Message 3 of 3 , Sep 1, 2004
          As an add on, I noticed a difference in starting the
          car after I put in the new pump. The Vega pump works
          just as well as the OEM one and only costs $30.00 USD.
          The strainer was another ten dollars and offers more
          surface area as well, about x3. You are right about
          the heat though. When it was hot, I could not get up
          3k
          miles of hill. The car would vapor lock and stop. I am
          referring to me 1986 528e.


          --- jim845034 <sfj642@...> wrote:

          > Hi - have been watching this thread but rarely reply
          >
          > My 1985 528i was working well, but in checking round
          > found that the
          > transfer pump wasn't working. I fitted a
          > replacement at 150GBP
          > (over $200) BUT IT MADE ABSOLUTELY NO DIFFERENCE TO
          > ANYTHING.
          >
          > I think the transfer pump was mainly for hot
          > countries or where there
          > had been some drain-down of the main fuel system. I
          > disconnected my
          > nice new pump - and the only change I could detect
          > was that I lost
          > the continual whining noise from the pump.
          >
          > The fuel regulator (sits on top of the engine at the
          > end of the fuel
          > rail) does have a major effect on these cars however
          > - a new one is
          > fairly cheap - 50GBP from BMW dealer. See Bentley
          > for checks of
          > pressures and bleed-down etc. Mine failed and gave
          > confusing
          > indications for a while.
          >
          > This it what I found - no guarantee of course !
          > Just thoughts before
          > you shell out !
          >
          > Regards from Jim Butterworth
          > 1985 528i SE auto
          > 1989 318i auto
          >
          >
          >
          > --- In bmwe28@..., "Steve Austin"
          > <steveaustin1@h...>
          > wrote:
          > > Thanks Ian. The transfer pump is original, so
          > with �126k on the
          > clock and
          > > having fitted a new main pump last year, I'll try
          > that first.
          > Cheers --
          > > Paul
          > >
          > >
          > > >From: iain@5...
          > > >Reply-To: bmwe28@...
          > > >To: bmwe28@...
          > > >Subject: Re: [bmw e28]
          > "Stutter"___528i,_Manual,__1985, �126k
          > Date: Tue,
          > > >31 Aug 2004 09:44:05 +0100
          > > >
          > > >If you find that repairing your transfer pump
          > doesn't solve the
          > problem
          > > >take
          > > >another look at your Air Flow Meter, these are a
          > dreadfully
          > unreliable part
          > > >and movement of the internal flap doesn't always
          > indacate that its
          > working
          > > >properly. The movement of the flap caused by
          > manifold vacuum in
          > tern moves
          > > >a
          > > >wiper arm housed in the black platic casing on
          > top of the AFM,
          > this arm
          > > >wipes
          > > >over a copper track to then give a reading to the
          > ECU of how much
          > air is
          > > >coming in. If this copper track is coroded or
          > dirty then
          > incorrect
          > > >readings
          > > >are sent. And if you are getting your stuttering
          > symptoms at
          > roughly the
          > > >same
          > > >depression of the throttle each time then a
          > certain part of the
          > track could
          > > >be
          > > >worn / dirty.
          > > >
          > > >Many people are of the opinion that the track can
          > be cleaned to
          > improve
          > > >things
          > > >but I wouldn't recommend it, many an AFM have
          > been killed off
          > completely
          > > >when
          > > >tring this.
          > > >
          > > >Ideally you would put a known good AFM in your
          > car and see if that
          > solves
          > > >your
          > > >problem.
          > > >
          > > >If you don't have acess to one then you could buy
          > a new or
          > reconditioned
          > > >one.
          > > > www.gsfcarparts.com specialise in these to some
          > extent but they
          > don't
          > > >come
          > > >cheap. I would bet you won't see any change out
          > of �125 for a
          > recon.
          > > >
          > > >Iain
          > > >
          > > >"Steve Austin" <steveaustin1@h...> wrote:
          > > >
          > > > > Ron, Thanks once again. I live in England,
          > we don't get 120F
          > > > > temeperatures: -120F maybe! The "Vega trick"
          > - I take it is a
          > reference
          > > >to
          > > > > a cheaper part. I'll see if there are any
          > distributors over
          > here, but
          > > >do
          > > > > you have any more details. Eg Make, Model,
          > etc.. Cheers. --
          > Paul. (PS.
          > > > > Ordered the diff oil from redline you
          > recommended by the way.
          > Will get
          > > >that
          > > > > changed tomorrow)
          > > > >
          > > > >
          > > > > >From: Ron Kall <ronjkall@y...>
          > > > > >Reply-To: bmwe28@...
          > > > > >To: bmwe28@...
          > > > > >Subject: Re: [bmw e28]
          > "Stutter"___528i,_Manual,__1985,__�126k_
          > > > > >Date: Mon, 30 Aug 2004 16:28:29 -0700 (PDT)
          > > > > >
          > > > > >Paul,
          > > > > >
          > > > > >It's the transfer pump. Try running up a
          > 4,000 foot
          > > > > >mountain at 6% grade and outside temperature
          > at 120F.
          > > > > >If it vapor locks before you get all the way
          > to the
          > > > > >top, then it's the transfer pump. Do the vega
          > pump
          > > > > >trick. It's only $30.00, USD of course. There
          > are
          > > > > >instructions online to see the fix. Search
          > yahoo for
          > > > > >the pix and detailed instructions.
          > > > > >
          > > > > >
          > > > > >--- bty821185 <steveaustin1@h...> wrote:
          > > > > >
          > > > > > > For the last two years I've had a problem
          > that
          > > > > > > doesn't cause me too
          > > > > > > many headaches, because of the way I drive
          > and the
          > > > > > > relatively few
          > > > > > > miles per year I do, but I'd sure like to
          > cure it.
          > > > > > > When travelling
          > > > > > > at a CONSTANT speed (eg 35mph in 4th,
          > 20mph in 3rd,
          > > > > > > etc... but does
          > > > > > > not seem to happen after, say, 55/60mph in
          > 5th)I get
          > > > > > > what can only be
          > > > > > > described as a "stutter" or part surge.
          > The RPM
          > > > > > > gauge doesn't move
          > > > > > > and I have no hesitation when accelerating
          > or
          > > > > > > decelerating. But I get
          > > > > > > the feeling that fuel is not getting
          > through
          > > > > > > properly. Last week
          > > > > > > changed fuel filter again. 6k miles ago:
          > New
          > > > > > > fuses, cleaned main
          > > > > > > grounds with Detoxit contact cleaner, New
          > Main Fuel
          > > > > > > Pump, Fuel Pump
          > > > > > > relay, Fuel Filter, Fuel Pressure
          > Regulator,
          === message truncated ===


          =====
          Ron Kall
          Rancho Cucamonga, CA 91730


          1986 528e
          1985 535i



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