i did a tune up on my jimmy. put new plugs wires and cap truck is running rough.

20

Asked by Sep 08, 2012 at 05:30 PM about the 1994 GMC Jimmy 4 Dr SLT 4WD SUV

Question type: Maintenance & Repair

it ran better before the tune up. any ideas whatts causeing the rough idel

8 Answers

35,555

Check the wires its easy to accidentally cross them

Best Answer Mark helpful
20

ok thanks ill try it.

1 of 1 people found this helpful.
20

john any chance can send the wiring diagram?

1 of 1 people found this helpful.
35,555

I'm assuming its a 4.3L The numbers represent the cylinders on each side Passengers side. Driver side 6 5 4. 3 2. 1 Front The distributor being looked at from the front going in a clockwise rotation is numbered 165432 4 5 3 6 2 1

20

sorry to bother you john. heres my e-mail add. baileywilliam87@yahoo.com. thanks again.

35,555

So glad hitting enter didn't paragraph the stuff give me about 20 mins gotta find thebook with the pic

19,765

the 4.3's can be picky with plugs. Best with ACDelco. Did you gap the plugs?

1 of 1 people found this helpful.
95

Also try resetting the ecm by either pulling the ECM fuse or disconnecting the battery for 15 mins . Then once hooked back up the ECM will re-adjust the timing etc. according to the new parts performance.

2 of 2 people found this helpful.

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