Ok my grand has had a misfire for a while now. It only does it if the engine is pulling or if im going up a hill. It's not enough to prevent me from driving but enough to stop me from offroading. I have replaced the plugs, The dist cap, roter, ignition pickup, ignition position sensor, fuel filter, and the fuel pump. nothing is helping this beast. I am not getting any codes at this time eather. Whats everyones thoughts on this? any help would do me wonders, thanks!

 

Did you replace the plug wires too? A pin hole in one of the spark plug boots can cause what you describe.

 

no but one of them the rubber part was slightly ripped and i just taped it up. I suppose i will probably replace them. Its an aftermarket set of plug wires now so ill just go oem. Unless there is something better? I figure it might be grounding with the block threw the tape?

 

It idles just fine but do you still think plug wires?

 

Yep, the spark will "leak" out of damaged and worn wires under a load, not so much at idle.

 

ok ill get on thoes asap. should i go upgrandeed or cheap?

 

I replace mine at every tune up, so I go mid grade.