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  1. #1

    Default 2002 GMC Sonoma will not start

    Hi there my name is Mike I have a 2002 GMC Sonoma with a 2.2lt, 5sp. It just stopped running on Saturday, got it home and started checking things. It has spark, the injectors are firing, the fuel pump has 50lbs pressure and it won't start. I have tried ether and it still don't start. The motor will just turn over, but it sounds like a faint backfire in the exhaust. I checked the timing chain and it's not broke, tried another coil pack and still nothing, what I'm I missing????? This truck only has 78,000 miles, I've tried unplugging the MAP, TPS, O2, IAC, TEMP sensors and still nothing. Will be doing a Compression check tomorrow. Is there anything else you guy can think of or if any of you has had the same problem let me know. Thanks Mike

  2. #2


    Try checking your plug wire ends. Pull a plug and check the gap. Spark needs to be bright blue to run, yellow/orange spark won't lite. On the fuel side check for flow. Filter or pressure regulator may be plugged.

  3. #3


    Mine just got Fixed from same issue and it was the Ignition Control Module Very Cheap on ebay
    99 Gmc Sonoma SL 4.3L 4x4 Reg Cab Long Bed

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