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09-05-2009, 11:43 PM #1
Hello - Oh, and a warm running problem
My 1992 Suburban is giving me fits with its warm running problem. I have chased problems from bumper to bumper, but the symptoms continue.
Some history; we purchased the 1992 K2500 7.4 Suburban with 190K miles on it, and it ran fine. It was parked for >6 months, while I had other irons in the fire.
I took it to be smogged, and it passed with flying colors. The most significant mechanical problem at the time was an annoying shifting problem, were it felt like the transmission was getting no speed input. I chased that problem down, with a replacement wiring harness and computer solving that problem.
I performed a standard tune-up; plugs, cap, rotor, wires, fuel filter, oil and filter change. Also, I changed the thermostat because it was stuck open.
It started having a hesitation problem, where it felt like 2 cylinders were falling out, so I changed out the coil, and added an MSD ignition system. No change.
I narrowed the symptoms down to being worse when warm, thinking maybe a lean-condition. I changed out the fuel pressure regulator and distributor pickup sensor, and the throttle position sensor. No change.
Anyway, it's driving me crazy. I still haven't figured out the problem, and I'm tired of throwing parts at it. Should I head to the dealership? Any thoughts, and help would be GREATLY appreciated.
Paul2005 K1500 Suburban LT 50K miles - All Stock
1992 K2500 Suburban 200K miles - Still Running:rofl:
09-06-2009, 01:21 AM #2
09-06-2009, 10:19 AM #3
Welcome to the site...you might get more responses if you post in the tech section.
Bobby - North Carolina
2008 4x4 5.3L V8
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09-07-2009, 02:50 AM #4
09-07-2009, 10:01 AM #5
Welcome to the site, try a MAP sensor, some cars also have an IAC and that can do the same thing, the IAC you can actually take apart and clean99 K1500 Suburban LT "THE BEAST"
Hypertech III, K&N, true dual
09-10-2009, 12:07 AM #6
Welcome to the site!Michael, 17, CA
2005 Silverado - See my garage for my mod list
09-10-2009, 04:09 PM #7
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Welcome to the site!
2010 Z/71 Colorado C/C
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09-11-2009, 08:00 AM #8
wlcome to the site.........2000 Silverado Z71 Whipple Supercharger, JBA Headers,3" cat back Flowmaster Exhaust, Volant cai, Pioneer Preimer deck,Orion subwoofer,03 signal light mirrors,03 taililghts
09-26-2009, 01:24 AM #9
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09-26-2009, 06:13 PM #10
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