04redline0124

well im gunna see if it does it again since i put new plugs AGAIN (just to se if it was maybe a faulty plug or something because u know my luck joe lol), and put in some Seafoam and injector to see if maybe that makes a difference. Any chance that it was the IC pump failing that causes the problem at random??

ItalianJoe1

iTrader: (10)

Yeah, I'm working on getting a spare set, I would like to throw them in and see if it clears up. I just wish I could get it to happen all the time. Hate to think that it was fixed, only to have it come back in a month or some ****.

Yeah, you need to fix that too. Buy another one, I'll slap it on next time you are here.

04redline0124

ok will do...ill throw you some cash dont worry, because i also need the tranny fluid changed like u said, and then maybe u can check the sensors for me!

nhanson

iTrader: (1)

try unplugging the battery to reset the pcm?

04redline0124

did that last night...so many possibilities, so its so hard to narrow it down, cuz if it goes away temporarily, i dont wnana think its gone, and then it comes back when i really dont need it to lol

Psykostevo

You have to set those multipliers to not mess with the AFR. YOu are thinking 14.7AFR and probably getting 12.5, and that's at idle!

You gotta zero those suckers out!

ItalianJoe1

iTrader: (10)

I didn't do the tune, but I'll change it next time I see his car.

So you zero them, or make them 1.0? Its an adder value, correct?

Psykostevo

I looked at it to make sure because I have been confused on all these different cars I mess with. On the Cobalt you ZERO it out because it is an adder, on some other cars you make it 1 because it's a multiplier.

ItalianJoe1

iTrader: (10)

Ok, thats what I thought, but you had said make it 1.0 earlier, so I wanted to confirm. I don't always trust HPT descriptions and stuff like that, its too easy to word it wrong. I'll make sure I clear that up on his car next chance I get. Should help with mileage as well.

04redline0124

wut does that exactly do thoe?

Psykostevo

Because you don't have a catylitic convert the car is thinking that the one you should have is overheating and is trying to make your AFR ~12.5 at idle.

04redline0124

ook lol

04redline0124

update:

I threw another p0300 yesterday sitting in a drivethru. Both times this has happened at idle. And this problem with the sputtering happened alittle bit today whil i gave it alittle in 3rd gear. Any thoughts besides italianjoe1 lol?

04redline0124

another update!!

put the new injectors in and the car is still running like kinda ass....when we were logging the car there was a bad iat and boost spike and hte car just didnt wanna move and it just kept shaking and sputtering. So im gunna replace the MAP sensor and see if that helps. But the car misfires bad at idle, and the engline light came on again today!! wtf is wrong here?? Ive replaced evertyhing now, except for the sensors.

HELP!!

Doc

could the injector/plug wiring harness be faulty..??...check the resistance of the wiring for the harness....I know people mix the wires up when hooking them back up, I wonder if the wires may be faulty.

heyitsmikey1987

im having the same problem too i replaced my plugs with zex thought that fixed it but now im having problems im swaping out injectors doing a fuel filter and getting new coils ill keep you updated

04redline0124

u have my problem man, sont waste ur time on the injectors man. go straight for the sensors

ItalianJoe1

iTrader: (10)

We are going to have to change the injector harness as well. I think the MAP sensor is the issue, based on the logs, but I still think that it might be something in the wiring. I don't really trust the fact that someone else was in the system before, something could have been damaged when the injectors were installed the first time, wires twisted, who knows.

04redline0124

alrighty, u wanna change the coil pack harness also??

ItalianJoe1

iTrader: (10)

No, that wasn't messed with before like the injectors. And only one thing at a time anyway.

04redline0124

true

heyitsmikey1987

i guess i'm swaping out coils then first see if that fixes it

Altiery54

i am having the exact same problems but only at idle and when i let off the gas and am slowing down

04redline0124

yea go the code read today, and it was another p0300 again so that is already known!! im trying to get a map sensor, but saturn wanted 92.00 bucks for it :/...soo im guna get it from auto zone as the acdelco piece

Altiery54

hmmm. i also threw a p0172 which means its running rich. u throw that yet?