Question about 1998 GMC Sonoma
Posted by Anonymous on
You may have a fuel blockage
if it is fuel injected, remove the fuel supply line leading up to the fuel rail, put the end of the hose into a small jar, turn the engine over a few times to see if fuel is coming through, if no fuel is coming through check the fuel filter, if still no fuel your problem is most probably in the fuel pump in the tank.
if you have fuel at the hose you took off the fuel rail your problem is possibly electrical, start by removing a lead from each plug one at a time, hold the end of the lead near a metal surface such as a bolt head or the block, crank the engine and check for spark from the lead, if there is spark on that lead check the other leads as well, if they all spark move to the spark plugs and check all of those by removing them from the head, putting the lead on the plug and put the plug onto a metal surface and crank the engine, if there is spark at the point on the plug it can be considered to be working.
repeat the same steps for all the plugs but make sure you hold the plug on the block with a good pair of insulated pliers to avoid getting a shock from the lead.
If all the plugs are working check for compression in the engine.
if all those steps dont find the problem you will have to consult a mechanical workshop for further checks
hope this has helped
Posted on Jul 04, 2010
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Posted on Jan 02, 2017
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