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Chevy S10 - GMC S15 and Sonoma Exhaust problems

10 messages,  Last post on Jul 11, 2009 at 5:34 AM

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

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#7 of 10 Re: black smut at tail pipe at first crank in am [gonogo] by jstancil Jul 08, 2009 (11:01 am)
Replying to: gonogo (Jul 08, 2009 6:05 am) Fuel regulator ok did not see or smell gas from the regulator. map sensor and throttle position sensor replaced also.Could this be a vacuum leak problem, maybe when vaccume hose gets hot it expands and leaks? Replies to this message: gonogo (Jul 09, 2009 7:11 am) jstancil (Jul 10, 2009 8:17 am) gonogo (Jul 11, 2009 5:34 am)
#8 of 10 Re: black smut at tail pipe at first crank in am [jstancil] by gonogo Jul 09, 2009 (7:11 am)
Replying to: jstancil (Jul 08, 2009 11:01 am) I am leaning toward bad injector, when plugs are pulled are all sooted or just one. Replies to this message: jstancil (Jul 10, 2009 8:17 am) gonogo (Jul 11, 2009 5:34 am)
#9 of 10 Re: black smut at tail pipe at first crank in am [gonogo] by jstancil Jul 10, 2009 (8:17 am)
Replying to: gonogo (Jul 09, 2009 7:11 am) Yes me to although I did a fuel injection service at a shop, this is where the send the injection cleaner directly through the carb. When I replaced the plugs as I remember there was 1 plug that did look a little smutty. Is there a way of pressure blowing out the injectors and is this expensive, Can a injector expand with heat and cause problems when it gets hot. Does and injector usually get stopped up or does it just go bad on most vehicles . If so with this many miles I may just drive it until is stops then put a lower millage motor in it. Replies to this message: gonogo (Jul 11, 2009 5:34 am)
#10 of 10 Re: black smut at tail pipe at first crank in am [jstancil] by gonogo Jul 11, 2009 (5:34 am)
Replying to: jstancil (Jul 10, 2009 8:17 am) Excess fuel will run good with a cold engine, not so good hot. I would say the sooty plug has the bad injector.

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