*Resolved !!* Cutting out at slight throttle only?? - idles and runs fine
06-22-2006, 02:57 PM
#17
Administrator - "Tyson"
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Per Porken's suggestion, I disconnected my idle switch a while ago. I also have my vacuum limiter removed.
06-22-2006, 03:10 PM
#18
Burning Brakes
I don't want to hijack but now that you mention the vacuum limiter... what is the effect of removing it?
I love the off-throttle engine braking however... it gets especially strong a moment after letting off the throttle... not sure what causes this (does it cut off fuel?) but I don't want to lose this feature.
Rick
'83 5-speed
I love the off-throttle engine braking however... it gets especially strong a moment after letting off the throttle... not sure what causes this (does it cut off fuel?) but I don't want to lose this feature.
Rick
'83 5-speed
06-22-2006, 03:19 PM
#20
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Hacker - interested as well, please continue:
- what does disconnecting the idle switch do and benefit?
- what does removing vaccume limiter do and benefit?
- what does disconnecting the idle switch do and benefit?
- what does removing vaccume limiter do and benefit?
06-22-2006, 03:52 PM
#21
Administrator - "Tyson"
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Vacuum limiter is the disc on the side of the TB (not sure if the autos have one). When you close the throttle, the engine vacuum bleeds air past the throttle plate via the vacuum limiter. This keeps the rpms from dropping too fast & keep the engine from creating too much vacuum. Something about emissions or something is what this is for.
I had mine removed a long time ago (3 years?). When I would close the throttle in neutral, my car would almost die, rpm would drop to zero then bounce up. I discovered (via Porken) this is from the idle switch. This switch totally cuts fuel for a brief second. This combined with the vacuum limiter prevents un-burnt fuel from dumping out the tail pipe. So remove one, disconnect the other.
It annoys me when the rpms hang between gears. Removing the vacuum limiter corrects this. Personal taste I guess.
I had mine removed a long time ago (3 years?). When I would close the throttle in neutral, my car would almost die, rpm would drop to zero then bounce up. I discovered (via Porken) this is from the idle switch. This switch totally cuts fuel for a brief second. This combined with the vacuum limiter prevents un-burnt fuel from dumping out the tail pipe. So remove one, disconnect the other.
It annoys me when the rpms hang between gears. Removing the vacuum limiter corrects this. Personal taste I guess.
06-22-2006, 04:04 PM
#22
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Thread Starter
Thanks hacker. It does seem like a benefit to a 5sp, but likely very subtle to feel in an AT.
May try it for kicks though, to see if it provides a more positive feel on 1st gear downshifts after cross-foot blip (I know, left foot break the AT, but feel of right foot brake/throttle is too imbedded and feels more natural). As is now, you can feel a slight run-on before the revs taper down, so if it does let r's drop immediately, that'd feel much more responsive to input... we'll see.
May try it for kicks though, to see if it provides a more positive feel on 1st gear downshifts after cross-foot blip (I know, left foot break the AT, but feel of right foot brake/throttle is too imbedded and feels more natural). As is now, you can feel a slight run-on before the revs taper down, so if it does let r's drop immediately, that'd feel much more responsive to input... we'll see.