Is it normal to have hesitation while RPM fall?
#1
Is it normal to have hesitation while RPM fall?
Hi all,
'95, stock besides downpipe and catback.
Searched around but didnt really find anything.
When I rev the car in neutral (up to say 2500-3000), then let off the gas, there is a little bumpyness/hesitation/shudder @ ~1400 RPM, like right before it falls to idle. I can see it on the needle, and feel it in the car.
Roommate noticed it without me saying anything to him.
Is this normal 'rotaryness' or something else?
I do not believe this to be the 3k hesitation because what I am referring to happens after letting off the gas.
It never really has a 100% smooth fall back to idle.
further, not sure if related, if i play with the pedal around that rpm range (~13-1500) I often get a loud pop out of the tailpipe.
I figure it runs rich being a '95 to be on the safe side, but not sure if that explains/is related the first part.
I have a video around here somewhere if this isn't clear.
Appreciate all input
'95, stock besides downpipe and catback.
Searched around but didnt really find anything.
When I rev the car in neutral (up to say 2500-3000), then let off the gas, there is a little bumpyness/hesitation/shudder @ ~1400 RPM, like right before it falls to idle. I can see it on the needle, and feel it in the car.
Roommate noticed it without me saying anything to him.
Is this normal 'rotaryness' or something else?
I do not believe this to be the 3k hesitation because what I am referring to happens after letting off the gas.
It never really has a 100% smooth fall back to idle.
further, not sure if related, if i play with the pedal around that rpm range (~13-1500) I often get a loud pop out of the tailpipe.
I figure it runs rich being a '95 to be on the safe side, but not sure if that explains/is related the first part.
I have a video around here somewhere if this isn't clear.
Appreciate all input
Last edited by 00SPEC; 01-28-16 at 04:44 PM.
#2
*While RPMs fall
Would be a better title
Would be a better title
Hi all,
'95, stock besides downpipe and catback.
Searched around but didnt really find anything.
When I rev the car in neutral (up to say 2500-3000), then let off the gas, there is a little bumpyness/hesitation/shudder @ ~1400 RPM, like right before it falls to idle. I can see it on the needle, and feel it in the car.
Roommate noticed it without me saying anything to him.
Is this normal 'rotaryness' or something else?
I do not believe this to be the 3k hesitation because what I am referring to happens after letting off the gas.
It never really has a 100% smooth fall back to idle.
further, not sure if related, if i play with the pedal around that rpm range (~13-1500) I often get a loud pop out of the tailpipe.
I figure it runs rich being a '95 to be on the safe side, but not sure if that explains/is related the first part.
I have a video around here somewhere if this isn't clear.
Appreciate all input
'95, stock besides downpipe and catback.
Searched around but didnt really find anything.
When I rev the car in neutral (up to say 2500-3000), then let off the gas, there is a little bumpyness/hesitation/shudder @ ~1400 RPM, like right before it falls to idle. I can see it on the needle, and feel it in the car.
Roommate noticed it without me saying anything to him.
Is this normal 'rotaryness' or something else?
I do not believe this to be the 3k hesitation because what I am referring to happens after letting off the gas.
It never really has a 100% smooth fall back to idle.
further, not sure if related, if i play with the pedal around that rpm range (~13-1500) I often get a loud pop out of the tailpipe.
I figure it runs rich being a '95 to be on the safe side, but not sure if that explains/is related the first part.
I have a video around here somewhere if this isn't clear.
Appreciate all input
#3
Senior Member
My 93 does the same thing. Full turboback exhaust with an intake and efini Y-pipe. I just assumed it was the mods which were the reason it did it. Subbing for the solution.
#5
Full Member
iTrader: (3)
My FD has a similar issue where it does not like to fall back to idle smoothly (or at all). It will sometimes do so slowly or irregularly, or sometimes even hang at around 2000 rpm before shuddering a bit and then go all the way down to idle. Accompanied by pops out the exhaust a lot of the time.
Can't figure out logically what the heck it might be and I don't really feel like replacing stuff at random is productive. Hoping others with more experience chime in.
*Edit: usually if I jab the throttle a bit I can induce it to fall back down to a reasonable idle, but that is not always the case. More pops out the exhaust.
**Edit 2: I have a Pettit Unlimited ECU, BNR turbos, downpipe, and catback exhaust.
Can't figure out logically what the heck it might be and I don't really feel like replacing stuff at random is productive. Hoping others with more experience chime in.
*Edit: usually if I jab the throttle a bit I can induce it to fall back down to a reasonable idle, but that is not always the case. More pops out the exhaust.
**Edit 2: I have a Pettit Unlimited ECU, BNR turbos, downpipe, and catback exhaust.
Last edited by celkc; 01-28-16 at 09:50 PM.
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