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SUVs Chevrolet Blazer Chevy Blazer Starting and Stalling Problems
324 messages, Last post on Nov 14, 2009 at 8:20 AM
You are in the Chevrolet Blazer Forum. Your Hosts are steve_ & tidester
| I have a 2001 blazer and on hot days the truck will run for a while then starts shutting off. It will restarts but then in about 15 min. it will die again. I don't know what it is . It acts like the fuel pump isn't working right but you can here it prime and you can here it run. I've replaced the fuel filter and the relay . I acts like it's got something to due with the temp. Like something is getting to hot and kills the truck. I'm losted on this one i've had it looked at and they say nothings wrong with it. So can someone please help me my two kids ride in the truck and its getting really bad. | |
I already have a post #189 and I haven't gotten any response to it. I need some help bad. As I had said in my first post, I have a 97 Blazer and it won't start unless you pour gas into the carburetor. It will then run but when you cut it off it won't start again unless you pour the gas into the carburetor again. Like today we did that and let it run for about two hours in the driveway and it sounded great but as soon as we cut it off that was it. We changed the fuel filter and we can hear the fuel pump coming on when you turn the key. And another thing it has been doing is cutting off when you start to slow down to stop or make a turn. It doesn't do it every time but it does do it a couple of times after you first start to drive it.Today we checked the fuel line we can see that the fuel is moving from the tank to the motor but then it stops and will not go to the carburetor. Please if anyone could help I would appreciate it. I need to get this fixed asap!
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Replying to: blondie16 (Aug 07, 2008 5:17 pm) With regard to the problem, it could be a bad crankshaft position sensor. If the sensor doesn't "see" the engine turning, it shuts off the fuel flow. This sensor is mounted down by the crankshaft at the 7 o'clock position facing the engine. Questions: How many miles on the engine? Did the problem come on suddenly, or worsen over time? Is the "Service Engine Soon" light coming on when the engine is running? The fuel pump circuit is designed to pressurize when you first turn the key on, but will only continue to run if the CPS tells the computer the engine is turning. Give us some more detail and we will try to help. Jim
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Replying to: blondie16 (Aug 07, 2008 5:17 pm)
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Replying to: jlflemmons (Aug 07, 2008 5:45 pm)
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Replying to: elaney1981 (Aug 08, 2008 4:44 am) |
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Replying to: blondie16 (Aug 08, 2008 1:36 pm) But the description you detailed above with the problem getting worse and worse does sound more like the fuel regulator or fuel spider assembly. GM did have a problem with regulators "leaking down" where the engine would get flooded when not running, making it very hard to start, and causing it to run rough at low speed. At higher engine speeds the engine would run rich, but still run. If you have an Autozone in your area, they can read the code that has been set in the computer and tell you where the problem is occuring. Any time a service engine soon lamp is lit, a code is set in the ECM indicating what is wrong. Let me say here that you have to put some thought behind what it tells you. I have seen folks replace oxygen sensors because thats what the code said was bad, when the problem was a damaged wiring harness. I had a car that twice indicated the throttle position sensor was bad. Shop replaced it twice under warranty before the mechie noticed that one of the contacts wasn't snapped into the connector and was only making intermittent connection. Once fully seated, the problem never occured again. So, get the code checked, and see if you get a heavy fuel smell from the throttle body after the vehicle sits overnight. That will give you an indication that the fuel regulator is leaking. |
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Replying to: jlflemmons (Aug 08, 2008 8:01 pm) |
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Replying to: jlflemmons (May 11, 2008 5:53 pm) can you tell me if i would have a canister on my 1993 s-10 blazer 4.3 vortex? if so would this canister prevent normal performance of the vehicle, such as cranking / running? the vehicle will crank{not consistently} but when it will you can maybe go a mile && it shuts down. if i had to describe , it feels like trash in the fuel line/obstruction. however, let it sit for an hour && it cranks up. i have replaced 4fuel pumps{3 nock-offs & 1 ac delco} list of items replaced is excessive: fuel pump assembly, fueltank, relay,fuel filter, cpi spydar assembly, oil sending unit{my oil pressure showed low  times when full}, o2 sensor & ignition module,. the fuel pressure is excellent & consistent. we have got a trouble code # 43 electronic spark control but haynes manual is vague on the subject. i know you re thinking all that for a 1993? yes with a rebuilt motor with no more than 30,000miles. we cant give up, however, we are getting frustrated!! please ANYONE can you help.
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