Question about GMC K1500

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1997 gmc k1500 seems to be running rich, very rich

Truck has new 350 crate engine, with mostly new everything except egr, ecm, and sfi w/ pressure reg.!!! just starting to break it in and truck stalled after going a few miles, started back up but was really rough running and sputtering. it died again and would not start, towed it home and after sitting for 2 hours it started but was rich, and codes read cam and crank sensors, i believe them to be false but why i do not know.. could it be my ecm or just a false reading due to sputtering from richness? also is it possible to stall out from richness? and since everything points to vaccuum, fuel press reg, or injectors im probably going to due upper intake again and replace injection assembly but im curious about the stalling? please any info would help

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  • hjcarlton1 Apr 15, 2009

    I'm having the same problem, my 98 gmc started fowling plugs and running rough then wouldn't run at all. I replaced the spider injector, timing chain and gears, dist.cap, plugs and cam sensor. I can't get it to start. I'm just about ready to sell it scrap.

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If the engine is trying to flood, it will kill the engine. If you have the spider fuel system, it is noted for problems.
If it cranks good but won't start, have a helper crank it while you check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure, also, check fuel injector pulse.
I don't know if this may be a problem? below
1997 gmc k1500  seems to be running rich, very ric - camshaft retard offset-1jibdyka02hdyoscptb5vkje-3-0.jpg

Posted on Mar 21, 2017

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Posted on Jan 02, 2017

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yankstorm02
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SOURCE: 1997 gmc k1500 runs really rich

Hi there,first of all you must synch the cam/crank sensors. To do this put the engine on top dead center remove the distributor cap and look very closely at the dist housing there will be a 6 mark and an 8 mark loosen distributor and rotate untill the rotor points directly at the 8. The marks are small so get a light and look closely.Clear codes and restart. Is vehicle still running rich?

Posted on Apr 17, 2009

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