Tach to zero, engine dead, until...
#1
Tach to zero, engine dead, until...
The car is an SE. It is tuned to spec, and otherwise runs excellent.
About 20% of the time when I'm clutching and changing gears, the tach will go all the way to zero, engine dies, until I let back out on the clutch. This clutch change is the ones you make when you're turning in to another street or going over a pothole, etc. The regular gear shifting pattern is undisturbed.
I've checked the service manual for deceleration problems and the the items it listed I recently checked for.
Someone on another thread (FD) had mentioned their flywheel was too light and it caused their problem. I've not changed mine.
Any ideas?
jeryj
About 20% of the time when I'm clutching and changing gears, the tach will go all the way to zero, engine dies, until I let back out on the clutch. This clutch change is the ones you make when you're turning in to another street or going over a pothole, etc. The regular gear shifting pattern is undisturbed.
I've checked the service manual for deceleration problems and the the items it listed I recently checked for.
Someone on another thread (FD) had mentioned their flywheel was too light and it caused their problem. I've not changed mine.
Any ideas?
jeryj
#2
Old [Sch|F]ool
Does it otherwise idle okay when just sitting in neutral?
Also, are you saying that the tach first drops to zero, then a few sec. later the engine dies, or that they both happen at the same time? What I'm getting at is trying to figure if it's a stalling problem or an electrical bugaboo.
Also, are you saying that the tach first drops to zero, then a few sec. later the engine dies, or that they both happen at the same time? What I'm getting at is trying to figure if it's a stalling problem or an electrical bugaboo.
#3
Thanks for the reply.
Under the "normal" scenario, the tach does a "slow" drop (thanks to the dashpot etal), then I let out on the clutch, and the revs begin to pick back up with throttle.
When it has its "colon attack", the darn tach/engine doesn't slowly go down. It will drop like the fuel has been cut off (this occurs with my foot OFF the gas and the clutch pushed in). Obviously when I let off the clutch, the car momentum starts it back up.
It only does this during a "prolonged" shift pattern (holding the clutch in while going over a speedbump, etc). It may be occuring on "regular" gear shifting, but since I make the shift so quickly, the car doesn't have time to manifest the problem.
Either way, this only occurs about 20% of the time during the "prolonged" shifts.
jeryj
Under the "normal" scenario, the tach does a "slow" drop (thanks to the dashpot etal), then I let out on the clutch, and the revs begin to pick back up with throttle.
When it has its "colon attack", the darn tach/engine doesn't slowly go down. It will drop like the fuel has been cut off (this occurs with my foot OFF the gas and the clutch pushed in). Obviously when I let off the clutch, the car momentum starts it back up.
It only does this during a "prolonged" shift pattern (holding the clutch in while going over a speedbump, etc). It may be occuring on "regular" gear shifting, but since I make the shift so quickly, the car doesn't have time to manifest the problem.
Either way, this only occurs about 20% of the time during the "prolonged" shifts.
jeryj
#5
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Its not really momentum starting the car, its the rear wheels turning the tranny, and the tranny turning the engine when you let the clutch out, simulating a starter by rotating the flywheel.
Anywho, check the dashpot and TPS for proper adjustment. I had a TPS that would intermittently fail, and cause the vehicle not to start. Its a hard proplem to diagnose cause its intermittent.
Anywho, check the dashpot and TPS for proper adjustment. I had a TPS that would intermittently fail, and cause the vehicle not to start. Its a hard proplem to diagnose cause its intermittent.
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