95 eclipse sputtering

[griffdus]

i really need some help here i have a 95 eclipse gs it has a bad sputter bewteen 2500 rpm and snaps out of it by 4000 rpm.although it runs fine when in nuetral or when clutch engaged and u rev it up. I have changed numerous parts on it including: spark plugs, wires, coil pack, o2 sensor, fuel filter, camshaft position sensor, air filter, harmonic balancer. I looked over all my vaccums, i had my transmission flushed, and i cleaned my fuel system and throttle. anyone have any ideas please help me out.

[steviek]

it could be throttle position sensor to. It seems like you are on the right track with what you have already changed. I had something similar to that and it was just a weak signal coming from the TPS. I didn't even know those cars had carburetors?

[griffdus]

ya that was my next step i jus got one ill see if it works

[david-b]

May also be crank position sensor. Those cause a lot of problems also. Might just want to check to see if it's functioning properly.

[griffdus]

changed my throttle position sensor today nothing happened. i guess ill give the crank position sensor a try , ill let u guys know what happens.

[david-b]

Are you reseting the ECu after making these changes?

[griffdus]

Ya i unhooked the battery for bout twenty min

[steviek]

|I think its a weak signal. my bet is something is getting grounded or shorted somewhere. I mean you have gone through pretty much anything that something like that can be. I would start checking electrical wires.

[griffdus]

k i found a stripped bolt on my coil pack, Do u guys think it might not be grounding out right? not really sure if they ground on these cars or not

[griffdus]

k so i took my car for a ride today and now its revving up and down by itself and almost dieing. and when u turn off the car the computer(under the hood and near the battery) makes a humming noise like it running still, waited at least a minute still didnt turn off so i turned the key forward and back then it shut off. went back out ten minute later started it, quit reving up and down. Think maybe computer going out wat u think?
Also i started checking my wiring, started by cd player because it was stolen before and wires were cut . looks like my ground wires that connect to the wiring harness were grounded to a bolt right by the drivers side right foot (if u remove the side plastic panel)u can see a bolt with a washer (has one like it on other side to wasnt man made) so i unkooked it and my dash lights turn off . Any ideas?

[griffdus]

anyone got any ideas?

[griffdus]

k so i jus had my car in the shop for a month changed timing belt and a couple of seals. had all my sensors and wiring checked all looked good. car has alot better idle but still sputtering, also is reving up and down on its own when warm. thinking computer but dont really wanna waist the money if it wont fix. would u guys try the computer i mean i already spent 1200$ trying to fix, got any ideas please let me know?

[SilvrEclipse]

I would try and find someone that would let you borrow their ECU. I agree that you shouldn't buy one just to try it but that about the only thing left.

[gthompson97]

If you do end up buying a different computer, I suggest ebay, they usually go for around $20-40 versus $200 for a new one and I haven't heard any bad stories about them yet. Make sure its for your year car though, 95's are specific to 95's, 96 to 96, and 97-99 are physically different than the 95 & 96

[griffdus]

tried ecu today still no change, i really dont know wat else to do today it was reving up and down on its own, then wen i would come to a stop the motor would sputter from0000rpm to 1000rpm if u touched the gas nothing happened had to wait for it to just snap out of it, got in my driveway was about to shut it off revved up and down again i shut it off went back out twenty minutes later started it ran fine for about five minutes then started all over again first sputtering, then revving up and down , to sputtering real bad