Running Rough

[DanThMan1983]

okay guys my car runs pretty rough and am almost absolutely sure its because of my cams but ill give the story. First of all its a fresh rebuild, (8.5:1 compression/dks1 cams/evo3 16g/safcII/data logger/550cc/walbro255.) And at first I had a timing issue so I had to tear down the front cover and re-time it(was a tooth off.) Got that taken care of. Now it was running terrible and the check engine light was coming on and I was wondering why so I used my data logger and found MAF codes, looked further into it and found the MAF not picking up a signal at all. I realized I didnt have my SAFC-II plugged in so as soon as I plugged that in the signal picked up. Now it just runs crappy. I have a question though what kind of vacuum are you guys getting at idle with these cams? I get about 12 inches of vacuum at idle and about 15 at 1500 rpms.

 

[brute]

That sounds normal to me. Did you set timing to 5* BTDC? I did not when I put my head in, and it made it run awful. I broke out the timing light, set it to 5* BTDC, and it's been running like a champ since.

 

[DanThMan1983]

could be my problem, I didnt have a timing light on hand but my buddy is bringing one tonight. Adjust it by moving the cam sensor correct?

 

[spyderturbo007]

Could you post up all of your SAFC settings, such as TPS trigger points, Ne points and correction values, sensor type, etc, etc.

 

[Spooling99]

Do you have the 255ph pump, You could be overrunning your injectors as well. Just a thought.

 

[JayRolla]

Thats what I was about to say, you didnt mention a AFPR. you could be over running the injectors. You should still be close enough on the timing to run good. When I built my motor and went to time it was still at 5*.