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Chevy S10 - GMC S15 and Sonoma Stalling/Dying issues

168 messages,  Last post on Nov 02, 2009 at 11:36 AM

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What is this discussion about? Chevrolet S-10, GMC Sonoma, GMC S-15, Truck

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#74 of 168 Re: 97 s-10 cutting out at constant speed...HELP [mschul] by taewa Apr 19, 2007 (5:25 pm)
Replying to: mschul (Apr 19, 2007 8:43 am) Thanks for the suggestion. I have the same suspicion, as my friend and I were banging on the CAT, and we could hear it moving around. We thought about removing it, but wouldn't that set off the rear O-2 sensor or any other kind of computer check?
#76 of 168 cutting out by wookie1 Jul 25, 2007 (10:35 am)
Replies to this message: reddawg1 (Nov 15, 2007 1:32 pm) keltecbob (Nov 16, 2007 2:52 pm)
#77 of 168 cutting out by wookie1 Jul 25, 2007 (10:35 am)
i have a 96 s10 with a 4.3L engine i just replaced the map sensor the problem i have is when i try driving it the engine starts cutting out bad but runs great at an idle i can unplug the map sensor and drive it anywhere without any problems and when i plug the map sensor in and unplug the oxygen sensor it has to warm up before it runs ok it starts cutting out bad until it's warm the first time i had a problem it was the harness that plugs into the intake but thats no longer the issue. anyone have any suggestions on what is causing my problems? would apriciate any help Replies to this message: hoodlatch (Aug 09, 2007 6:27 am)
#78 of 168 2003 s10 fuel pump/cat problems by badluckwiths10 Aug 08, 2007 (8:58 am)
fuel pump going bad replaced fuel filter didn't help can't find a price in town all over $300 please help find better price also my cat is going bad would like to straight pipe it but it has an o2 sensor after it how can i trick the o2 sensor into thinking it is reading properly oh yeah 4.3L vortec
#79 of 168 Re: cutting out [wookie1] by hoodlatch Aug 09, 2007 (6:27 am)
Replying to: wookie1 (Jul 25, 2007 10:35 am) Did you check the plastic hose that goes to the MAP? It may be cracked or plugged. Or the nipple where it plugs in may be stopped up.   What kind of code reading did it give? When you clear the code does the same code come back?   As to it running better when you unplug the sensor, I've read on some cars the E CC can go to a default mode when the sensor is taken out or goes out, like an O2 sensor for example.   At risk of being redundant, one of the first signs of a bad coil is it starts bucking when the engine labors on a long pull like going up a steep grade.   Good luck
#80 of 168 s10 ss just died by s10ss Sep 27, 2007 (11:28 pm)
i have a question about my 4.3 s10 ss stalling...iwas cruising at about 55 and 1500rpm when all of a sudden it just cut out...i was wonderng if thiswas a common problem..orif it could be the fuel pump or something...
#81 of 168 91 gmc s15 stumble on acceleration by keltecbob Nov 01, 2007 (2:26 pm)
My son has a 91 s15,4.3L that has started to stumble on acceleration. It only gives a code for rich fuel mixture. I jump the code reader and watch the service eng. light flash a 45 code. I have changed the O2 sensor, and rebuilt the internal fuel regulator in the throttle body. Also has new inline fuel filterChecked the tps for out of range voltage, seemed fine. Cleaned EGR valve, wasn't too bad. But it still stumbles at each shift, and if I force the accelerator to make it shift it will stumble even more. I looked into the throttle body at idle and both injectors look to be giving lots of fuel, maybe too much at idle. Tried to test the Idle air control sensor but not sure if I did that right? Any ideas or how to test sensors better would be appreciated.
#82 of 168 Re: 93 GMC Sonoma Hesitation while acceleration [acrumpler] by camojockey Nov 01, 2007 (5:07 pm)
Replying to: acrumpler (Jan 01, 2007 5:10 pm) hi, is your truck T.B.I.? if so check your egr valve and the egr solonoid. My 89 TBI had same prob. egr was opening and dropping vacuum in engine Maybe it will help Replies to this message: keltecbob (Nov 01, 2007 8:54 pm)
#83 of 168 Re: 93 GMC Sonoma Hesitation while acceleration [camojockey] by keltecbob Nov 01, 2007 (8:54 pm)
Replying to: camojockey (Nov 01, 2007 5:07 pm) Hi, yes it is a tbi. I tried cleaning egr and it didn't appear to have any problem moving. Dont know where or if this model has an egr solenoid. It has a vacuum hose coming out of it. still researching this one.   Bob

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