need input!!

[P51DTUG]

Hello all....I have a '92 4.0L sport. Just recently I replaced both heads on the engine, due to blown head gasket(s) and cracked heads. Got everything back together, put in new fluids, new t-stat, plugs and plug wires. When it started it has a miss. Didn't have the miss before. Doesn't leak anywhere. Coil pack is about 6 month's old. At idle, the miss is hardly noticable, put a load on the engine and it feels like it's going to fall apart. I'm at the point to where I want to beat the thing with the sledge...
Any ideas would be appreciated.

Thanks, Jim

 

[Jacked93]

did you get all the plug wires back in the order they go?

 

[P51DTUG]

Yes I did..3 times just to make sure I wasn't overlooking the obvious.
I'm curious about the o2 sensor..if it gets wet from the coolant in the exhaust when head gasket let go, will it die and not throw a code to computer??

Thanks....Jim

 

[Jacked93]

o2 sensor

The o2 sensor is a solid-state electronic deveice which shouldn't be harmed by moisture, supposedly the only thing that can harm solid-state electronics is excessive heat, but anything is possible

 

[thunderhorse]

O2 sensor

This sensor can be contamiated (sp) by oil, coolant, and carbon. If it is soiled the engine goes into limp mode and runs VERY rich. after a cracked head of head gasket lets go it would be a good idea to replace the o2

 

[aldive]

Re: o2 sensor

Originally posted by Jacked93
The o2 sensor is a solid-state electronic deveice which shouldn't be harmed by moisture, supposedly the only thing that can harm solid-state electronics is excessive heat, but anything is possible

Or exposure to a nuclear detonation...

 

[aldive]

Did you hook up a scanner and see the readings of the sensor(s)?

Good luck with your problem.