So as many of you know I was running around to all of the LT1 knowledgeable (or sometimes just anyone) getting help to get my engine back in shape over the weekend at Hallett. First off thank you as always for the assistance everyone is always willing to give. Unfortunately I was not successful and have not been successful up to this point. Below is what I have done up to this point and what I felt in the car.

It ran great Friday morning. Midway through the session right after lunch I just started loosing power. At first I thought I was just not carrying enough corner speed and subsequently exiting at a lower RPM. It got worse fast though. We had noticed after session one that my water pump had started to leak from the weep hole so I planned on changing it that night. when I started loosing power I assumed that the Opti had gone bad from water getting inside or something.

Replaced those that night. On Saturday for warm up..... same problem. Also the plug wires where on their last leg so went ahead and put news ones on as well. I checked all the spark plugs that night and gaped them. A few looked a bit too white but they did not correlate with the dead cylinders that I had.

We found out that the back three cylinders on the driver side were not doing anything. We determined this by pulling the injector plug on each cylinder one at a time and then replacing it to see if engine reacted. I know I had air because..... well I have no reason to think it would not be getting air. I know it had spark because after replacing the opti i pulled a spark out of one of the dead cylinders and had Tyler turn the car over. Shocking the crap out of myself confirmed that we had spark. Last but far from least I know that the injectors were at least firing because you could feel it and Tyler put a screw to each one and against his ear and could hear them. I at the time what I did not know is whether or not fuel was actually making it through. I ended up find out that Curtis had injectors in his trailer so i put those on. Still no fix.


Back here I ran a compression test. Every cylinder was between 125 and 135psi. Measured fuel pressure at idle with vacuum line pulled from the FPR, 42. With Vacuum line on and on the road, 34-38 WOT.

I am hopefully going to be pulling the codes this weekend, so hopefully that sheds some light. That being said, at this point if anyone has ideas I am all ears.


BTW is Curtis on this forum? If so what is his username, I have some injectors that I need to mail back to him.