Chevrolet Blazer Engine and Performance Problems

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173 messages, Last post on May 17, 2013 at 5:35 PM

You are in the Chevrolet Blazer Forum.

Your Hosts are steve_ & kyfdx

What is this discussion about? Chevrolet Blazer, SUV

#163 of 173 starting problem chev blazer 2000 model by femeka

Jul 19, 2011 (4:10 pm)

i have been useing my blazer for some years now ,but last two months i drive to a supermarket and parked after shoping wen i came back try to start the car but car denied to start after many hours i took it to workshop for two months electricains and mechanic could not not start my chev they have tryed to change the brian box, coil, sensors, but the problem still remian thesame, pls if there is any advice or help you can give i wil realy apreciate. please i need ur reply on this matter.

#164 of 173 starting problem chev blazer 2000 model by femeka

Jul 20, 2011 (9:01 am)

please i need ur help guys, my chev blazer 2000 model has serious problem it dosent start it only crank i have change brian box , coils , sensor, but the problem still remain thesame , there is normal flow of current from the brainbox to the coil but from the rutor to the coil there know current , i have change the plug wires, rutor cap , the problem remain thesame, please i need your help.

#166 of 173 Vacuum Issues???? by getterdone1

Feb 09, 2012 (2:05 pm)

I have been having issues with my 1994 Chevy Blazer 5.7. I have had it tested by a shop and the codes that came up said my MAP sensor was having issues and it was running lean. I replaced the MAP sensor, EGR valve solenoid and it was no better. I was on the freeway the other day and my gas pedal sucked to the floor and the truck was accelerating. I turned the key off and back on but the engine was revving so high the truck never completely shut off but it did release the gas pedal. Why would this happen?

#167 of 173 Re: surge while driving [jhill133] by getterdone1

Feb 10, 2012 (9:28 am)

Replying to: jhill133 (Aug 16, 2007 12:55 pm)

I have a 1994 and it is also doing this. I have replaced several things and the item that gave me the MOST improvment was replacing the PCV valve now It seems to do it much more in colder and not so much when it's warm. Still lost as to what the rest of the problem is

#169 of 173 95 blazer, rpms suge to 1800 at idle by rx7420

Apr 25, 2012 (8:39 am)

sometimes it wont start when it does start it idles fine for a bit then when u put it in drive it will be ok then the rpms will surge to 1300 and at idle around 1800 and stay that way till i shut it off i thought maybe the idle control motor was bad so i replaced it and it didnt fix it any ideas

#170 of 173 Re: high idle on 97 blazer [horsey] by rx7420

Apr 25, 2012 (8:38 pm)

Replying to: horsey (Mar 09, 2008 7:19 pm)

hey my 95 blazer is kinda havein the same problem did u ever figure it out?

#171 of 173 91 S10, Poor gas milage, stalling on deceleration by rfletcher

Sep 03, 2012 (2:47 pm)

Blazer Sport 4X4 4.3l TBI 185000 miles. No trouble codes. Code 12 only. Has a long history of stalling at high speed, rough idle and poor gas mileage. Gave up on DIY. After four professional shops and more money than I care to think about, finally found the problem, or so I thought. Last shop found, inside, the throttle body totally encrusted with carbon. One vacuum port had to be drilled out. Cleaned body and installed overhaul kit including the fuel regulator and injectors. Replaced O2 sensor for the third time. Truck ran as new for a few weeks. Fuel consumption same as when new. Was never that great. Now: does not stall at high speed but does stall on rapid deceleration. Intermittent rough idle and poor gas mileage. In desperation, purchased an ALDL to USB interface for the laptop. Running WinALDL. Data scan indicates INT set to 128 as is normal for open loop. BLM counts from 0 to 256 then starts over. Do not know what this count means. O2 does not hunt. Never changes more than .465 to .570 during warm up. Temp. was a little low so changed sensor. Now 287F. No effect. All other sensors are normal. It appears to be stuck in open loop and running very rich. I am in over my head and treading water. Does any of this mean anything to anyone? Defective ECM? Defective wiring? Thanks to anyone and everyone.

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