Question about 1987 GMC G2500
Flushed heater core out, got water on motor ,ran fine for about 15 min then started to miss then died ,doesn't run .seems like it doesn't have full fire, looked at cap and rotor, seems fin?
Spray the cap and distributor and all the HT leads with a water dispersant (wd-40 or CRC spray) Any moisture in the cap will cause a ht short circuit and any dirt tracks outside will do the same.
Posted on Feb 09, 2014
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Posted on Jan 02, 2017
Try changing the fuel filter and checking the fuel pressure at the shredder valve. The readings should be 60 to 65psi with the fuel line pressurized with the engine not running, once the engine is running. It should drop by 5psi. Start with the simple things first. Keep me posted, be glad to help.
Posted on Jun 28, 2009
Check the fuel cap!! If the vacuum relief is not working it can impede the fuel flow and cause the engine to shut down or not restart after a stop. Waiting usually gives things a chance to stabalize and the engine will restsrt. When this happens again try loosening the cap and see if the engine will restart.....If it restarts immediately, REPLACE the fuel cap..Do Not leave it loose because this will cause other problems. If it is not the fuel cap the problem may be the filter, the fuel pump, or aome other fuel system malfunction.
Posted on Jan 24, 2010
Testimonial: "Great will try it "
SOURCE: flushing the heater core
I removed the hoses and took a air nozzle at low pressure and blew in the return hose connection of the core. A big chunk of paste like substance shot out then pure liquid. I put the hoses back on and tested it. Now its blowing hot!!!!!!!
Posted on Dec 14, 2010
SOURCE: 90 gmc sierra no start
did you use the dylectric grease that should have came with the ignition module?
the module can be ruined by excessive heat, the grease is to insulate the module from too much heat.
also check for lose connections.
hope this is helpfull
Posted on Oct 27, 2011
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