charlie97z28

iTrader: (2)

ive searched and not come up with anything but my problem is the coils are not firing on 2.3.7.8. youcan grab onto the header tubes on those cylinders an dthey are luke warm the others are to hot to touch so ive ran through all the wiring and checked all the grounds the only thing i havent replaced is the crank sensor csn that cause it just to hit on some and not on others im to the point im fixing to order a new computer and wiring harness does anybody have any input before i order the harness

gMAG

iTrader: (1)

Here's thread going on, above^^.
https://ls1tech.com/forums/generatio...need-help.html
I encountered a similar problem with what I thought were some non-firing cylinders (cold headers).
I found that the small, coil harness had been turned around, backward on both the passenger and driver's side. So, instead of having 1, 3, 5, 7...I had 7, 5, 3, 1,. Likewise with the pass side....instead of 2, 4, 6, 8...I had 8, 6, 4, 2.
Verify that the color codes on both coil harnesses are correct to each cylinder.

DopeFedZ

iTrader: (34)

Look at the pin cavities on both of the coil pack harnesses. The connectors that plug into each coil pack and the female end of the connector where the coil pack harness plugs into the engine harness.

Check the silver electrical female terminals inside the cavities in the connectors and look to see if any of them looked to be stretched opened. If they are use a pick to pull down on the little "tab" of the terminal to ensure there is a good contact between both the female and male terminals.

The silver terminal in this picture you want to make sure is not stretched from having unplugged and plugged in the connector a bunch of times.

dr_whigham

iTrader: (49)

I had the same problem on the dyno last month. Turned out it wasn't a coil. It was one of my injectors.

If it ISN'T the coils, maybe it's a whole bank of injectors. Just something to keep in the back of your head.