Motor diagnosis help Options

[rtalich]

I built a type IV Torquer kit complete with SDS EFI over a year ago. It’s been running awesome ever since. In fact, once I got the tuning figured out it kept getting better and better. Just recently, about a month ago now, it’s like someone flipped a switch and it started running terrible. All of a sudden, it started running very lean and therefore getting hot. I traced the problem down to be an inadequate fuel filtration system, which caused my injectors to clog. I resolved that problem thinking that was the sole source but came to realize it was not. The only thing that I can think it could be is the timing somehow got messed up. I think I’ve checked everything I could to rule out something mechanical. My leakdown numbers are #1 – 18%, #2 – 19%, #3 – 15% and #4 - 16%. I know these aren't the best numbers but not sure if they could be causing the problems I'm seeing. Please let me know if I'm wrong...... Compression numbers on all cylinders were measured to be 165-170psi. I checked timing and somehow is off by about 10* and can’t be corrected with the SDS programmer. The only way I can think of how the timing could’ve gotten messed up to produce these results is if the pulley shifted on the crank or the sensor moved somehow. All these ‘look’ OK. I’d need to remove the motor in order to thoroughly check to be sure. Here are a couple of videos to help solve this problem.

http://www.youtube.com/watch?v=-ymZQDYepMY

http://www.youtube.com/watch?v=jtN7EeyxFek

I just would like some confirmation that I’m on the right track before going thru the hassle of removing the motor only to find that it wasn’t the issue.

Thanks,
Rob

[DNHunt]

Rob

I'll be around until about 5.

Troy,

The TPS doesn't do much but give acceleration enrichment

[messix]

Rob

I'll be around until about 5.

Troy,

The TPS doesn't do much but give acceleration enrichment

never mind