i did a tune up on my jimmy. put new plugs wires and cap truck is running rough.
20

Asked by crazylegs 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
69,085

John answered 11 years ago

Check the wires its easy to accidentally cross them

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69,085

John answered 11 years ago

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

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20

crazylegs answered 11 years ago

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

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69,085

John answered 11 years ago

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

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60,435

Andrew answered 11 years ago

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

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265

Ben answered 11 years ago

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.

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