swapped 4.3 to 6.0 and not getting spark to one cylinder NEED HELP

[butler145]

yeah they are slightly fluctuating. do u think that is what the problem is? about how long would it take to fix that? or how hard?

[farmtruc]

yeah they are slightly fluctuating. do u think that is what the problem is? about how long would it take to fix that? or how hard?

before you go digging in the engine, let's get what fluctuating means to you, quick jerks up and down, erratic, but staying in the same general area, not moving more than 20rpms up and down, like the needle is just flickering like a loose light bulb, that's what i mean. not a surge up and down, like the engine needs more air at idle.
make sure it's jerking, pulsing, kind of inconsistantly up and down.
IF SO, i say it's the crank shaft sensor or the reluctor wheel.
probably the wheel cuase the sensor is picking up the good teeth on the wheel and firing those coils.

that's just my guess, it's not hard to pull the pan.

[butler145]

well pulled the pan and looked at the relucter wheel didnt appear to have anything wrong with it. so dont know what else there is now to look for?

[danger_ranger83]

Check the free play in the crank

[butler145]

well think i fgured out the problem why it wasnt getting spark. found that one of the intake valves was bent and sticking open so all the fuel and air was fouling out the spark plug almost instantly. hopefully fix that and that will solve the problem.

[Hambone!]

So it was in fact getting spark this whole time?? With all the coil changes, and other checks, did you actually check for spark, or just assume there wasn't any?

[butler145]

a guy i had working on it said he did check for spark y pulling the spark plug and grounding it but in fact he didnt. i got tired of him messing with it and went and picked my truck up. and that was first thing i did and it was getting spark the whole time. he also said he checked the compression but he didnt do that either. i checked it after saw there was spark and it showed zero compression. took off heads and the piston was bent open and after further examination the valve guide had cracked causing the valve to stick and piston hit the valve bending it. thats what happens when get impatient when injured and not able to work on my own truck and get someone else to do it thats lazy.