Cutting out/studdering at 3k-4k

[4g63tcrazy]

I have like 8 logs showing perfectly of what's going on. Here is the link to the thread I started with all the logs on the link forum: http://www.dsmlink.com/forums/showthread.php?t=46914

Not sure how to post the logs on here. It says invalid file when I try.

[Halon]

Wonder if it would attach if you Zipped it.

Dumb question, but what version of Link are you running? I ask because it sounds like it's only doing it under a little bit of load. You say it has no issue when you use light throttle, only when you give it a good bit of gas. Just wondering if you're using V3, and maybe something in your load tables got hosed up.

[C3L1CA]

I have another coil pack sitting in the garage along with a transistor if the other guy falls though and you want to try a different parts.

Hope its something easy though and not wiring.

[s1ngletracker]

Hopefully you've already checked this, but have you checked compression? I'd think that wouldn't be it though...

[4g63tcrazy]

Wonder if it would attach if you Zipped it.

Dumb question, but what version of Link are you running? I ask because it sounds like it's only doing it under a little bit of load. You say it has no issue when you use light throttle, only when you give it a good bit of gas. Just wondering if you're using V3, and maybe something in your load tables got hosed up.

I'm running v3 ecmlink. I tried tuning my a/f in using the load table back before I pulled the head off. I couldn't get a feel for it so I stopped. I went into my previous logs and set all the settings back to original.

I have another coil pack sitting in the garage along with a transistor if the other guy falls though and you want to try a different parts.

Hope its something easy though and not wiring.

iwanta4g63t on here is stopping over tonight and were swapping out the transistor and coil pack

Hopefully you've already checked this, but have you checked compression? I'd think that wouldn't be it though...

I'm actually about to go check compression right now.

[4g63tcrazy]

Cold engine compression 130-125-125-130.

[MustGoFaster]

Cold engine compression 130-125-125-130.

That's good enough. Nice and even and not ridiculously low.

As for the problem... IDK.

[4g63tcrazy]

Swapped out my coil pack and transistor with good known working ones. Same problem.. Gotta be something in the wiring harness. Only thing left that I have changed since I pulled the head off. Gonna take it out tomorrow and see if it's something obvious. If not then I will get a new harness.

[4g63tcrazy]

I know ground straps are pretty important but would they cause the car to act up like this? I took off the ground strap from the intake manifold to the firewall, but other then that they are all there from when the car ran great last time. (Battery to firewall, battery to tranny, tranny to frame rail and I think that's about it.)

The car wont even idle anymore either. If I let off the gas the car just wants to die and goes pig rich. If I hold it at like 3k rpm the a/f ratio goes back and forth all over the place. When I drove it yesterday it stayed at 10.0 rich for quite awhile and I could barely even accelerate or drive the car.

I'm gonna go pull the harness out and see if I find something obvious..

[123abc]

I know ground straps are pretty important but would they cause the car to act up like this? I took off the ground strap from the intake manifold to the firewall, but other then that they are all there from when the car ran great last time. (Battery to firewall, battery to tranny, tranny to frame rail and I think that's about it.)

The car wont even idle anymore either. If I let off the gas the car just wants to die and goes pig rich. If I hold it at like 3k rpm the a/f ratio goes back and forth all over the place. When I drove it yesterday it stayed at 10.0 rich for quite awhile and I could barely even accelerate or drive the car.

I'm gonna go pull the harness out and see if I find something obvious..

I've always just run one big wire from one of the starter bolts to the fire wall. It wouldn't hurt to make sure your grounds have good solid metal to metal contact.

Have you tried a different ecu with some 550's just for testing's sake?