2000 4.3 Blazer misfires and temp gauge drops
#1
2000 4.3 Blazer misfires and temp gauge drops
New, here on the forum. I have been living here in Costa Rica for 11 years now. Most mechanics do not know how to work on american cars, only Asian imports. With that being said,I have a 2000 Blazer LE with the 4.3 ltr. vortex engine. Here's the problem. If I visit the U.S. and let my car sit for a couple of weeks, when I come back and start the car, it runs fine for a day or 2. Then, this problem occurs. It starts to misfire, like one cylinder is missing. It bumps hard when idling. Also, the temp gauge goes crazy. Up and down to eventually all the way down. I replaced both o2 sensors and had the injectors cleans. I replaced the mass air flow sensor and then my mechanic sid the new one was bad so he put the old one back on. Still having problems. Any help would be greatly appreciated.
Last edited by oneluckymann; 08-22-2016 at 11:24 AM. Reason: added text.
#2
New, here on the forum. I have been living here in Costa Rica for 11 years now. Most mechanics do not know how to work on american cars, only Asian imports. With that being said,I have a 2000 Blazer LE with the 4.3 ltr. vortex engine. Here's the problem. If I visit the U.S. and let my car sit for a couple of weeks, when I come back and start the car, it runs fine for a day or 2. Then, this problem occurs. It starts to misfire, like one cylinder is missing. It bumps hard when idling. Also, the temp gauge goes crazy. Up and down to eventually all the way down. I replaced both o2 sensors and had the injectors cleans. I replaced the mass air flow sensor and then my mechanic sid the new one was bad so he put the old one back on. Still having problems. Any help would be greatly appreciated.
#4
Does the temp gauge go crazy at the same time the engine starts to miss? Does the temp gauge behave itself all the time that the engine runs well? Is the SES light on? If so, what are the stored codes? If engine is missing there should be a misfire code stored at a minimum of "pending"
#6
Would that be the intake temp. sensor, coolant temp sensor, air charge temp sensor or the ambient air temp sensor? Kinda confused here.
Last edited by oneluckymann; 08-25-2016 at 08:22 PM.
#8
Also look at the coolant temp the PCM is seeing while you are at it.
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