Throttle lift delay

[Jean]

wtf?! I don't like.

[golde30]

i dont have this problem AT ALL. my rpm drop instantly when im off the gas. in running '95 s50 w/ chromoly ltw m50 flywheel and s50 sachs clutch on getrag 260.

[lennon]

well it seems like its not consistent with later m50s/m52s....weird. different ecus?

[hoveringuy]

well it seems like its not consistent with later m50s/m52s....weird. different ecus?

I've run both a red and silver lablel 413. They are functionally identical. I get the same annoying "check engine" for Oxy sensor heat on both of them, but no throttle lift delay.

[lennon]

im 99 percent sure my friends m52 e36 that does it has a siemens ecu, just throwin that out there.

[Charlie]

No shit? That's wild. It could very well be ECU controlled then, for emissions purposes. I just find it hard to believe that:

1. Not all m50's do this
or
2. Not everyone notices

It's not a huge deal, but for a track car it would be a bad thing.

My '94 Vanos does this as well. You're not abnormal.

-Charlie

[JGood]

My '94 Vanos does this as well. You're not abnormal.

-Charlie

You have it on the track yet? Has it been a problem?

[ed94r]

Just a thought:

How is your throttle cable terminated at the throttle body? I use a (dont joke) small fishing sinker crimped onto the end of the cable. When I goose the throttle from the engine compartment at the throttle body, the cable/sinker binds...leaving the throttle cracked. This doesn't happen when I press the gas pedal, only when I manually goose the throttle body linkage.

Your cable may be binding at the crimp, leaving the the TB open. Check it out and make sure the Cable is slacking enough to fully close the TB when you come off the gas.

Ed

[Charlie]

You have it on the track yet? Has it been a problem?

About 10 track days so far. With the 8 lb M20 flywheel I haven't noticed any issues, revs fall off fine when under load, it's just when in neutral that it "hangs" a bit. I too thought it was clutch related, but I noticed that after you reset the ECU, it goes away for a while until it "relearns".

-Charlie