Does the computer needs to be reset?

[BlakeOfDoom]

I changed out the heads on a 91 navajo, I had the new heads (used) magnafluxed and resurfaced. Since I have installed them I am getting a nasty ticking sound behind the coil area; it is not a lifter. The vehicle has also run really poor since the installation. There is a rich fuel smell and the truck has been idling terribly. When it is in gear it feels like it is struggling and it is not drivable. I have had the negative battery disconnected many times and the computer does not seem to be able to reset itself to run right. Any ideas on a good plan of action? I'm lost.

 

[doonze]

I'd say that nasty ticking sound is what I would look too first before dealing with anything else. I'm gonna say that's got to be part of it. A good part I would guess. It could be your PCM is weird or fried, but I would bet that ticking will lead you to your problem.

Nothing should be ticking back there that I know of, so something ain't right.

 

[marragtop]

Probably a stupid question... have you check the wires and firing order?

 

[BlakeOfDoom]

wires and order have been checked and rechecked. everything is good in that regard. The injectors are wired up the right way too. They are all clicking when heard through a stethoscope. Could a lower intake manifold be the culprit? I mean if it was loose? could that be the cause of the tick? I added sealant and torqued everything down correctly.

 

[corkey]

ticking behind the coil sounds like an errant spark jumping to the intake, to make a ground,
and with it a cylinder misfire , causing the roughness, and gas smell from unburnt fuel
check the wires, make sure they are on all the way ,

 

[BlakeOfDoom]

wires have been replaced, coil replaced, plugs replaced, sounded like a premature grounding issue. I did not see anything (spark wise) when checking out everything at night.the truck shoots off one hell of a spark (I know because the current has traveled through me a few times)

 

[TedJ]

Does ticking = exhaust leak tick? An exhaust leak before the o2 sensors will make it run weird...

 

[BlakeOfDoom]

The manifolds and exhaust is nice and tight and free of leaks. There is no difference if the exhaust crossover is on or off; the engine still has the same running condition.