Thread: Studdering, bad idle, and CEL. Please help!

Thanks for trying to help guys. Robert, I don't need the stock injectors anymore. I'm taking Lee's advice on not wasting money on buying stock injectors when I'll have to upgrade them later anyways, so I bought a set of bigger injectors. Everything should arrive soon. Lee, IM me your address later. Thanks!

I had almost the exact same problem, and I mean exactly. It was so bad I took it back to the builder and we were thingking we were going to have to tear off the head. (head was reamnu by a different shop)

What fixed it (I kid you not) was cheecking the connection of the accesory and main leads to the positive batery terminal. We tightened it and unkinked one little wire there and it began running fine immediately (with ecu reset)

Best we can figure is irregular current to the ECU makes it stupid. It was pulling the #3 cyleder completely and jacking the idle. If its the same issue your going to kill your O2 with all the fuel thats going out unburnt. (I did)


YMMV I am a newb

P.S. Im in Roseville if you want to swing by I can let you use my Comp Tester. I know its far but figured I would offer the assistance I can since everyone else has offered in kind to me. I bought it to check this very problem.

Originally Posted by 98spydert

His ended up being a burnt valve. Half of it was gone!

The oh so cool shop that fixed it for him simple took the head off, dropped a new valve in, and put the head back on. Now he's got 50psi less compression in that cylinder compaired to the others. They told him that was normal...

The valve wasn't half gone, but it was still bad. :( Going to do another compression test soon and waiting for Manny to help me with the leak down test. The last time the compression was checked I got 150, 120, 120, 150. Not sure what is causing the low compression. The shop said they replaced the valve and resurfaced the area around it and said that is all I needed. They also said I didn't need to take my head to a machine shop to have it resurfaced and cleaned because my car has low mileage. The more I talk to Lee and my bro about this problem the more I feel ripped off. I certainly don't want to take the head off again, but I don't want to have this problem.

Originally Posted by 98spydert

You told me something completly different on the phone lol. Is the shop changing their story the more you question them or what?

Don't remember what I told you on the phone. Give me a call later or IM me. The last compression test was done at Manny's place. After I find out the results of another compression test and a leak down test I'll decide what to do from there. Last time I called the shop was to ask them about the valve cover gasket since it is leaking oil from the sides. The guy told me the gaskets will leak a little oil and try tightening the bolts down a little more.

P.S. - the shop that did the work was Newlogics motorsports. I do NOT recommend them and will not go back there. Overall I had a bad experience. It seems like they wanted my money and getting my car out of the garage rather than giving me advice and helping me out. Not to mention the long wait for parts when I could've just ordered the parts if they told me they couldn't get it in time.