Put on plugs, wires, cap and rotor. Since then, the truck hasnt been right. The check engine light was coming on every so often when sitting still or driving. Then all of a sudden it ran smooth for three weeks. Then one night the check engine light comes on and the next morning it wont start. Been like that for a week and today it started. Sitting there in park, the check engine light comes on and it idles high and low sporadically. Please help. when the check engine light comes on, the truck for those few second acts like it wants to cut off.

 

I sure hope you mean "running erratic" if not then you may want to check the rear end


Anyway, you may need to check that you installed the plug wires correctly, you may have one that is not seated all the way or is not in continuity.

 

Erratic. My fault. The wires seem to be seated correctly. Anything else out there?

 

Year & engine?

 

1992, 302 engine

 

To start with. To prevent cross-fire.




Check for Vac leaks, look for poor connections (Vac & electrical) & test IAC
http://www.fordfuelinjection.com/?p=39

Then there's Error code scans!

 

My wires are in the right all in the right spots. I am totally lost here

 

Note the plug wire routing path. Especially the #7. That's important. Not the just the fact that the right plug is connected.

Click on & read the IAC link. http://www.fordfuelinjection.com/?p=39

Check for Vac leaks, look for poor connections (Vac & electrical)

 

scan for codes too https://www.f150forum.com/f10/how-re...es-obdi-10907/

 

i dont get the reason for running the wires in a sertain place my truck have no wire looms and there running in not specific place and the trucks running fine... im stilll confused y u run it a certain way.