After changing the spark plugs, spark plug wires, rotor, and rotor cap it still misses?
Worn timing belt or bad map sensor, weak ignition coil, worn distributor gear (usually starts hard with that) Leaking manifold gaskets all possible causes. Start with a new coil, spray starting fluid around manifold gasket while running, if it revs up in any certain spots, manifold leaking (intake only test), check vacuum lines for cracks and leaks,(MAP) replace sensor. Over 75,000 miles probably timing belt, recommended change interval is 60,000 miles.
SOURCE: 2000 GMC Sierra 4.3L no spark at the plugs...HELP!
no codes. most direct components changed.
computer. take it out or have the truck towed to the shop/dealer to test the computer.
SOURCE: 94 gmc sonoma 4.3l vortec new coil, plugs, wires
The ignition module in the distributor is what you need to give the engine spark to the plugs. It senses signals from the PCM to regulate the spark control and this item is the part that took over the old style point & condensor type ignitions. It is time for a new one in your truck
SOURCE: my 1997 gmc sierra has a hesitation problem change
Did you check the timing?
Mine would idle rough and hesitate. I replaced all kinds of parts before finding out it was a bad ECM (computer) I found a used one for 50 bucks or so that fixed it.
SOURCE: I need the firing sequence on the 1994 GMC Sonoma
Here is the firing order diagrams for the 4.3 liter V-6 engine and the 2.2 liter 4 cylinder engine, and let me know if you need any help to understand these diagrams, or if you require any further assistance.
4.3 Liter V-6 Engine.
2.2 Liter 4 cylinder engine.
SOURCE: I have gotten a P0306 Cylinder 6 Misfire Code on a
I investigated this for over an hour while tossing things around in my head and truly think that you need to have your O2 censor checked along with your converter. One probable cause to your misfire could very well stem from your catalytic converter due to an O2 faulty etc.etc. Why not try a smog shop before tearing that engine apart any further and replacing any unnecessary gaskets. Thats a tight engine in my opinion and unless you really mistreat it, I would bet on it at race day. Have you recently been in a fender bender? Let us know cause that might change my advice.
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