Hello all...
I have a 04 cavy, just put a stage 2 spec clutch and lightweight flywheel in. It shifts great and disengages all the way so it seems
but i have been having this problem with sometimes when i engage/disengage the clutch while downshifting the RPMs will just out of the blue either dip slightly
below 1k, or go to 0 and cut the car off...it does not happen all the time and i cant really diagnose a certain part of my driving to see if I'm making a mistake because it just happens randomly,
I do have a customcargrills lightweight crank pulley on it...I was thinking maybe the timing is off and that the belt could be loose, because sometimes when the RPMs dip the belt will give off a little squeal....also it seems more and more like the car is kinda chugging instead of running smooth.
has anyone else ever had this problem? more-so could anyone please help with some ideas of what it could be?
Thanks in advance for any help received.
patience is a virtue.....i just didnt stand in line long enough to get any
This does not sound clutch related at all. It sounds more electrical.
FU Tuning
MIne used to do that on very rare occasion. Fixing the corrosion on the main chassis ground cured it and adding a few 2 gauge ground wires made sure it was better than ever.
I used to race cars, now I race myself.
5K PB: 24:50
10K PB: 54:26
could also be the computer not adjusting the IAC fast enough to compinsate for the light flywheel
Thanks for your ideas....I ended up taking it to an auto engineer, i feel like a jack a$$ for mentioning timing on an 04 ecotec now lol
its all computerized and yeah it turned out what they said is that the light flywheel spun the rpms down too fast (along with the light crank pulley)and the computer couldnt keep up with it, (they are german so its kinda hard to get a clear explination) they said something about a dampner that kicks in at around 2k rpms to slow the engine down evenly...they put my stock crank pulley back on...and it hasnt hiccuped at all
thanks again for the ideas
patience is a virtue.....i just didnt stand in line long enough to get any
Pfttt..... I'd have just turned the fast idle screw a bit and made it idle a bit higher.
Still sounds like crap to me. I have a aftermarket crank puley and flywheel and no issues.
FU Tuning
SHOoff wrote:Pfttt..... I'd have just turned the fast idle screw a bit and made it idle a bit higher.
Really?
Then the computer will see the extra air flow, and also see the TPS is saying that the car is idling, but it is getting more air than it should. It will think it has a vacuum leak, and also think it will be running to lean.
So in the end he gets a CEL.
My advice, leave the car stock, 37k today and not a single issue on an 04 STOCK Cavalier.
- 2004 Cavalier - 124k, owned since new
Rob S wrote:SHOoff wrote:Pfttt..... I'd have just turned the fast idle screw a bit and made it idle a bit higher.
Really?
Then the computer will see the extra air flow, and also see the TPS is saying that the car is idling, but it is getting more air than it should. It will think it has a vacuum leak, and also think it will be running to lean.
So in the end he gets a CEL.
My advice, leave the car stock, 37k today and not a single issue on an 04 STOCK Cavalier.
Incorrect.......
Adjusting the idle screw will press on the throttle slightly. This will have the same effect as holding slightly on the gas pedal. This will register on the TPS and the ECU will see it, and the only compensation for airflow that will be done is to adjust the injector pulsewidth appropriate for that throttle position. It will also, likely keep the car from stalling out. No CEL: will be thrown, so there would be no issue.
My advice is to not tell people to leave the car stock, especially when they've already got it modified. It's their car, they will do with it as they please. The poster asked for help with correcting the problem NOT wether or not they should be leaving it stock.
