5255Re: [bmw e28] L-Jet problems. Tricky one...
- Jul 17, 2008Hello, Start to check or replace the vacuum hoses. I had found a few cracked or broken and replaced with new ones. A common culprit is the bellows tube that connects the air filter to the intake. This a common problem with cracking that allows air to enter the system. This will cause the problem you have described. A new one is less than $30.00 US or repair with a silicone goop as I did. So far it has lasted several years. The engines need a good vacuum pulling the dipstick or remove the oil cap will cause loss of vacuum with will stall the engine. Try these thing first.
1986 535i 195k
--- On Thu, 7/17/08, Richard <tabull@...> wrote:
From: Richard <tabull@...>
Subject: [bmw e28] L-Jet problems. Tricky one...
Date: Thursday, July 17, 2008, 4:13 AM
Have a problem with my '82 E28 528i (Euro RH drive). The idle has been
really erratic lately, have tried just about every idle problem cure I
know with these L-Jets and the problem remains. I have finally traced
it down to the brake pedal. Strange, yes? If the car is idling and I
pump the brake pedal, the idle gets worse and worse until eventually
(after about 10 pumps) it stalls. It seems like a vacuum problem to
me, as the L-jet requires a near total vacuum seal or it won't run
well ie. if you remove the oil cap with the engine idling, it will
stall. I can't seem to find anywhere on the engine for a vacuum
connection to the brake system. Remember, the R/H drive model has a
different brake booster arrangement to the L/H drive model.
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