Non start Issue

[david-b]

Whats up. Still trying to figure out my nonstart issues. I posted before about when I tore down my motor, the rings were seated in the wrong places. Well I got new rings, reinstalled everything what I thought was perfect.

After it was all back together, the car won't really start. I can get it fired up if on the gas, and have to hold on the gas (about 15%+) to keep it idling. And it sounds like it's only on 2 cylinders. Very rough and very shaky.

I checked out MSnS and everything seems good there. All good readings, and all wiring is right. Check it all out. Getting spark and fuel on all cylinders. When motor was being torn down, I pulled all emissions related stuff. Head is flat and valves are seated.

Did a compression test and got 160-150-190-190. Would those 2 low numbers cause the car not to idle like that? I've head people having much worse numbers and still had it idling on it's own.

I've been told that the low numbers could be the rings not fully seated yet and that it's normal. True? Should I just rip it down again and make sure those rings are good?

 

[haswesley]

Those are awesome compression numbers. Your rings are doing their job. I see no reason to tear entire engine down again to check the rings. I can't help much with why you can't get it to idle, but you certainly don't have a problem with the rings.

 

[david-b]

Even with the 160 and 150?

The motor has 0 miles on it and was completely cold when had done the test as well. Only has about a total of 5 minutes worth of run time on it as well.

 

[athlete3344]

Did you check anything fuel related...fuel pump, injectors, regulator, etc?

 

[david-b]

FP is brand new, about 3000 miles. Injectors have about 300 miles on them. SFMU static FP is at 26psi.

What I'm going to do it pull the 750s and convert back to stock, and rewire up the stock ECU. The will eliminate MSnS out of the equation. I also have a stock coilpack and will check that to make sure the MSD pack is working good. I'm getting spark when grounding out the plugs, but it's worth a shot.

 

[XiKeiyaZI]

This is exactly what I'm afraid of happening when I go to start my engine this weekend.. -_-;;

Mmm... as far as an answer to the issue itself, the rings/compression is fine. It's pretty common for rings to be like that upon intial startup. The rings won't seat until under load... and you only have a limited time to do that before the hone loses it's purpose.

You're triple sure the timing is correct and that without the emissions stuff you discarded isn't causing the issue?

 

[david-b]

Timing is fine. If it was off, those 190s wouldn't be there.

I'm not sure about the emissions stuff. I've asked if this would cause problems since lots of people have taken theirs out seeing if there's been any problems. I sadly threw everything out (dumbass) so can't reconnect any sensors.

 

[tjbiker031]

Are you sure you have spark?

 

[david-b]

I pulled one wire at a time and put a plug in there and grounded it. When cranking it does spark. For some reason I remember on my Grand Am the sparks much quicker than these are.

 

[david-b]

Going back to this thread...
I had MS crash on me this week so I decided just to eliminate for now. I rewired it back to stock and threw in the stock injectors. Still the same issue. I reinstalled my stock coilpack, still same issue.

I am really at a loss of what else to do now. Any more ideas?