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In Reply to: exactly what i was wondering.. (more) posted by alister on May 22, 2000 at 10:43:23:
The manufacturers DO NOT recommend warming up the engine at idle. It may be because of the pollution/economy crap or it may not be good period. Someone posted some time ago the reasons why one should avoid doing it.
I think your mix is too rich or too poor. I'm not sure as how they would manifest, but it's probably a good guess. Maybe you need someone to take a good look at your engine management-wise. (i think you have the vanos but i might be wrong). it could also be the timing of the spark is not proper.
an injector cleaner unsettles the deposits and that's why it's a good idea to do it before an engine maintenance operation. it may also rise the octane grade of the gas - another reason for which you may have seen a short improvement.
Hope this helps.
Good luck,
Dragos
(btw, i didn't know 525is came with 6speed..)
: My '92 525i 6-speed has been acting odd the last 3 weeks. Heavy foot on the throttle under 3k RPM within a few hours on initial daily driving will result in the car stuttering as if it's not getting enough fuel or too much throttle combined with low RPMs. Without a long (10 min+) warmup it acts worse.
: Two weeks ago I added a full bottle of Valvoline fuel injector cleaner because my tech uses Valvoline too, to see if it would improve. There was a glorious improvement, alas short lived. A tank later and it seems the 'problem' returned albeit not as bad. I'm starting to wonder if my injectors are that nasty or I need some other type of engine/fuel-line work. *shrug*
: For the time being, I'm not driving as agressive until I figure something out.
: ken
: '92 525i
: area E34 - http://rowlan.com/bmw
:
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