Misses @2000 and no load, fine under load??

[fullahotair]

A new problem has arose, and I am started to do some trouble shooting... These symptons are new, and I haven't changed anything (although i have just started putting miles on the car, since i got it all together)....

The car know backfires through exhaust after a WOT pass in 3rd... no knock... The car is very hard to keep running on a cold start up...backfires, thorugh exhaust/stalls. It takes several times to get it started... Once the car warms up, starting is not an issue and idles fine with no indication of an issue. If i keep the car in park, bring the rpms up to 2100 or so the car will miss and stumble. If i put the car in drive, stand on the brake, and bring the rpms up to the 2100 rpm or higher, no miss or anything...

I would have thought putting a load on the car would make the problem worse...

So i am going to start checking a few things out, wasn't sure if anyone had any pointers... (i already swapped out the coil pack/mod...same symptons...


Thanks,
Nate

[fullahotair]

Anyone have any ideas? I am going to try to get it out on the road tonight to see what it does while driving it normal and WOT.




Thanks,
Nate

[TurboBuRick]

Take a look and see if it's loose or been hit. Check the balancer. Make sure it's tight.

Make sure your pulley bolts are not too long. I have seen where they have pushed the timing ring and caused issues.

I suggest these things considering coil pack, module, plugs and wires have all been ruled out.

Good luck!

Rick

[fullahotair]

Thanks for the reply... I put a "better looking" interrupter ring on the cam sensor, the orignal didn't look as "nice"..a little corroded. I did that a week or two ago... I didn't adjust the cam sensor, only the new ring. But since i had my hand in there, i'll look again and inspect...

The weird thing is that the miss/stumble seems to go away under load and starting is not an issue when everything is warmed up...


I haven't pulled the plugs yet, but if it was a fouled plug or wire, I would expect it to be worse under load...

Thanks...
Nate

[TurboBuRick]

Originally Posted by fullahotair

Thanks for the reply... I put a "better looking" interrupter ring on the cam sensor, the orignal didn't look as "nice"..a little corroded. I did that a week or two ago... I didn't adjust the cam sensor, only the new ring. But since i had my hand in there, i'll look again and inspect...

The weird thing is that the miss/stumble seems to go away under load and starting is not an issue when everything is warmed up...


I haven't pulled the plugs yet, but if it was a fouled plug or wire, I would expect it to be worse under load...

Thanks...
Nate

I was talking crank sensor..

[fullahotair]

my bad...i was going to check out the crank sensor too...I used the credit card trick to adjust that the other week as well...so i had my hands in there too, so it won't hurt to double check that either...

Thanks!
Nate

[fullahotair]

Found the problem!! the interrupter ring in the cam sensor was loose, the screw evidently wasn't as tight as i thought or it worked itself loose...

Thanks for the sounding board and troubleshooting ideas...


Nate