Question about 1994 Chevrolet C1500

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Timing is good. but suburban still runs very rough.. what is it.

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Replace the spark plugs, spark plug wires, distributor cap and rotor. Pull the plug wires off one at a time and do not attempt to install everything together. Install the new plug and wire for each cylinder individually before you start on the next cylinder. They have to be in the correct order or the engine will misfire and you will create a mess for yourself. Once that job is complete, then do the cap and rotor. These are words to live by, I promise. I did it the wrong way one time and I will NEVER do it again. Replacing the fuel filter would be a good idea also along with the air filter if needed.

Posted on May 09, 2010

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Posted on Jan 02, 2017

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1993 gmc suburban rough idle, stall in reverse


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Chevrolet suburban voltage gauge fluctuates


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I refrain from giving repair suggestions with problems like yours because people keep changing instead of testing parts. When I work on my vehicles or other peoples cars, I do testing to avoid buying expensive parts that most times won't correct the problem. At this point the most I'd suggest is to clean the mass air flow sensor wires with a Q-tip and carb cleaner...that often helps and is free. If you run into a problem with whatever you find, ask and I'll try to help.
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Throttle body located on top, front of engine, so very simple to access.

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