Question about 1999 GMC Suburban
Chug chug chug......I've replaced plugs, wires, exhaust sensors and "brain" to distributor. What now?
Cross the wire, probably the firing order problem.
Did you change the distributor cap, sometimes the distributor cap inside cracked, you won't see it, take off the distributor cap, but you have to remember the wires' order, lightly drop the distributor cap see if you can hear the cracking noise.
Or during the dark night, get a dark place, start your engine,see if there is spark out, fix that, maybe your car will run better.
When I had my Union 76 service station, I have solved several cases like thiat.
I had a big Sun electronic scope from 1973 to 1984, during that time, something I could't ping point where the problem was, therfore I used many experience, maybe I am wrong, but you can try it, I like to try everything.
Hope this ccan help you, good luck.
Posted on Jul 09, 2008
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Posted on Jan 02, 2017
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