stange tbi issue after tune up...

[95BlackTahoe]

Today, after coming home, my Tahoe, which after a tune up has been very underpowered, died for no reason a block away from my driveway. My son pushed it to the house with his Sierra.

After she cooled down a bit, I went out and removed the air cleaner, and wiggled the wires on the coil. They were fine. I did notice the # 7 plug wire appears to be loose. Pushed it back on. Attempted to start it and it fired up, ran for a few minutes and stalled again. restarted it and it ran again. injector pattern seems fine.

I used ac rapid-fire plugs, msd coil, msd 8.5 mm wires, accel ignition module (and they didn't give me any of the white thermal grease, so I used the dielectric variety) msd cap and rotor.

Personally, I am leaning to that accel module being the culprit, but I am sure the problem is electrical. Oh, and apparently I have a loosened rocker on #2...I know how my weekend is going to be spent...lol

If anyone has any thoughts please feel free to chime in.

Oh, the return fuel line by the filter is leaking about a gallon a hour...other than the obvious cost and danger (on list for weekend fix) could the return line cause any type of fuel pressure issue?

Thanks!

Shawn

 

[SunlitComet]

you were supposed to use di-electric grease anyway not thermal grease. normally the return line leaking would not effect fuel pressure but yes fix it immediately. What did you gap your plugs to anyway?

 

[AtomicHoe094]

yea any heat getting to that ignition module makes those things go crazy..

any codes?

 

[retorq]

Why is the rocker loose?? Could be a wiped cam lobe ... in which case it really doens't matter else is wrong or how much fuel is being wasted.

 

[95BlackTahoe]

Why is the rocker loose?? Could be a wiped cam lobe ... in which case it really doens't matter else is wrong or how much fuel is being wasted.

It appears that the rocker may be loose...the ticking of the lifter comes and goes...when its ticking, it has no power. when it stops ticking, the power comes back... all happened when they cleaned out the drain holes in the head

Shawn