ul-ss

I have a 01 camaro with an lm7 engine, Texas speed heads, ljms cam, 80lb injectors Lonnies double pump kit, tr7ix plugs, msd wires, and a Huron speed turbo kit. I took the car to get tuned after I installed the turbo kit, new cam and injectors and it was having issues he said to check compression. So I did a compression check and everything is within a good % of one another, fuel pressure reads fine. I pulled the valve covers and everything looked fine under their. When I pulled the plugs #7 was much darker than the the rest of the plugs and the car only really runs rough at about 1800-3000 rpm. Are there any other tests or anything else I should check for? Maybe should I have another tuner check it out?

Thanks for any help!

Darth_V8r

iTrader: (4)

Sounds like number seven injector is leaking

ul-ss

Should I try to swap the injectors around? or maybe just see if it is seated all the way

2xLS1

iTrader: (25)

Time to stick a borescope in cyl 7. You can get a USB borescope for under $20.

ul-ss

What should I look for with the boroscope, See if the top of the Piston or wall is marred up?

ul-ss

Also did a buzz test on all the injectors and they read fine and the fuel pressure did as well

2xLS1

iTrader: (25)

.....

ul-ss

Gotcha lol, ordered a borescope off of amazon should be here by monday or tuesday

ul-ss

I swapped the #7 injector with #2 ran it and checked the plugs the #2 plug never got any darker than it was. Also swapped around plug #7 and #3, the plug cleaned up immediately in #3. Cylinder 7 plug didn't get much darker than it already was either, I might need to run it longer though.

ul-ss

checked it out with the borescope didn't see anything out of the ordinary, Anything else I could check or do a test on?

gagliano7

Could also be a bad coil for cylinder 7.

Old Geezer

iTrader: (3)

Misfires on a scan?

ul-ss

I haven't tried swapping coils yet, should I try just buying 1 coil or maybe swap them around? No misfires on the scanner or any history of misfires. I had one code when i got it back from the tuner it was the p0200 code (injector circuit malfunction) after I swapped the injector #7 with #2 and cleared it I haven't gotten the code since. My buddy has some truck coils that I can try and hook up too

ul-ss

Swapped the coils with the truck coils and same results still stutters under acceleration

jaydubb

Wheres your plug gap set to? Does it only stutter under boost?

jaydubb

Oh yeah... I wouldnt use anti-seize on the plugs...

ul-ss

It seems to stutter more under vacuum, i haven't gotten into boost too much since the car isn't really tuned all the way yet. Stock gap out of the box, the tuner I went to recommended the plugs. Could the anti seize of messed up the plugs at all?

gagliano7

I had a friend once who put way to much antiseize on his plugs and it ran terrible. Cleaned them off and it was good. To much on the threads and you lose the ground for the plug.

Old Geezer

iTrader: (3)

Huh??

ul-ss

I got some tr6's and threw them in and it seems to be running a lot better it's still a little choppy under acceleration, but it is noticeably better. The car isn't completely tuned though, so now I'm not sure if it's tune or the car. I didn't put any anti seize on the plugs should I pull them back out and give them a small amount?