Maybe Misfire???

[black95maro]

Ok I've been trying forever to find out why my car is running rich and i wanted to ask you guys if by chance this sounds like a misfire or something like that to you... ok here is all that happens


1.) Very Rough idle at start up
2.)Vibrates really bad and very jumpy, but sometimes if i revv. it up to about 4500rpm. it will stop and sometimes it gets worse, it's really bad when the motor is colder
3.) Poor gas mileage
4.) Running rich
5.) Takes a few seconds for start up
6.) I also get a code but the code doesnt stay on long enough for me to get to AZ to scan it and it comes on about everytime i drive 1-3 times each time



Tell me if that sounds like a misfire to you guys if it is I'm prolly gonna go get some MSD Coils, MSD wires, and some NGK plugs



thanks.....

[v-6dailydriver]

Re: Maybe Misfire???

Tell my if that sounds like a misfire to you guys if it is I'm prolly gonna go get some MSD Coils, MSD wires, and some NGK plugs

1-5=yes
while you have it apart, take off your ig. mod. and take it to auto zone and have it tested...

just did mine last night.... laying in the snow... 10 deg. out.... good times, good times, lol....

[black95maro]

Re: Maybe Misfire???

so best bet is to replace it all and have the ig. module tested (not the most advanced on the ignition system so where is this exaclty and what is it?)...does AZ do that for free? i need to wait till its a little bit warmer here its in the teens lol

[v-6dailydriver]

Re: Maybe Misfire???

ig. mod. is under your coil pack's, some auto zone's can check your coil pack's too... from what i've read on this message board, any one of them (plugs/wires/coil pac/ig. mod.) can cause miss-fire, the fun part is figuring out which one...

[black95maro]

Re: Maybe Misfire???

So i should prolly start with the stuff that they can test im thinking.....

[v-6dailydriver]

Re: Maybe Misfire???

yep, i would.
unless you live in the middle of nowhere, like me lol....

[BLLDOGG]

Re: Maybe Misfire???

the code should still be there in history even if your ses light is not on.

[Vanquish]

Re: Maybe Misfire???

Yeah, the code will be stored in the history of your computer. Without that code we can't tell you ecactly the problem.

It is going to be plugs/wires/coils/pcv valve/ or an exhaust leak. Go get it scanned asap.

[black95maro]

Re: Maybe Misfire???

well i put some NGK plugs in tonight an that helped it an awful lot still running a lil rich but not bad im gonna get some wires because mine are about shot and hopefully that will solve it .....ill still get it scanned at let u guys know what comes up

[vanbibber]

Re: Maybe Misfire???

the code should still be there in history even if your ses light is not on.

are you sure? ive always been led to believe that obd1 cars dont keep the codes stored, hence why you have to have it scanned while the SES light is on.

[Vanquish]

Re: Maybe Misfire???

are you sure? ive always been led to believe that obd1 cars dont keep the codes stored, hence why you have to have it scanned while the SES light is on.

Good point. I forgot we we're dealing with a '95(OBD1) computer. Since the SES light comes on sparatically I would say change your wires since you say they are shot, and while you are putting in the wrench time check for an exhaust leak.

Also, what about your cat? Is it old, or could it be going bad yet?

[v-6dailydriver]

Re: Maybe Misfire???

well i put some NGK plugs in tonight an that helped it an awful lot still running a lil rich but not bad im gonna get some wires because mine are about shot and hopefully that will solve it .....ill still get it scanned at let u guys know what comes up

black95, i'll admit it, i'm a tight wad... but... when it comes to wire's on these cars, get [B]GOOD ONES[B]. msd/taylor exc... i put on the "top of the line" one's from advance, and 6 mo. later i was changing them again (burned up plug boot).:mad:

[Thefbomb13]

Re: Maybe Misfire???

I replaced all of that stuff coil plugs wires and icm and it still misfires

[black95maro]

Re: Maybe Misfire???

Also, what about your cat? Is it old, or could it be going bad yet?

I dont have a cat lol....

black95, i'll admit it, i'm a tight wad... but... when it comes to wire's on these cars, get [b]GOOD ONES[b]. msd/taylor exc... i put on the "top of the line" one's from advance, and 6 mo. later i was changing them again (burned up plug boot).

The ones I have are Taylor's but when i was taking them off for the new plugs to be put in the metal clamp inside the boot came off 2 of them...I was even being careful (by like twisting the boot as i pulled). They are the spiral pro's now so they arent junk i dont know why they fell apart on me owell, but i think im gonna go with the thundervolt now...

[v-6dailydriver]

Re: Maybe Misfire???

i dont know why they fell apart on me owell, but i think im gonna go with the thundervolt now...

that sux... did you put silicone greese on them?