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Chevy Blazer Hesitating and dying


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jasecom89
User

Dec 4, 2012, 8:23 AM

Post #1 of 16 (1478 views)
Chevy Blazer Hesitating and dying Sign In

Hi all, Im new to the site and hope I can get some help with a problem im having...
I have a 94 Chevy s10 Blazer, Im not sure on the litre size but it is a 6 cyl 4x4, and it has around 185k miles.
I will describe the course of events how I perceived them... Let my gas get low and got 5$ in gas at a shoddy looking station, soon after there my truck began to hesitate and sputter as I drove. I did that pretty severely for awhile and I assumed I got some bad gas.... Figured it would go away... Sure enough, after getting more gas the problem seemed to get better but every now and then at random while driving my truck would sputter and hesitate. I figured once again that the problem would just go away as it didnt seem that severe. It went like that for a few weeks but as of a few days ago while making a short trip out of town my truck got low on gas and died as I pulled into a station and got a few gallons, went down the road maybe 50 feet and it died again... started again just for a minute but died again and wouldnt start again after that. Thought it was the fuel filter, just replaced that last night, after replacement took it for a test drive and seemed to do fine for a few miles up the hwy but on the way back it started again and died just up the road from my house. Spark plugs? Wires? Fuel pump? Advice please?

Thanks Jared


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 4, 2012, 10:53 AM

Post #2 of 16 (1456 views)
Re: Chevy Blazer Hesitating and dying Sign In

  In tank fuel pumps are cooled and lubricated by the fuel in the tank. When you run a car out of gas or very low, it pumps a lot of air through the pump which overheats it and causes some severe wear and many times, failure when they cool off.
You will need to use a fuel pressure gauge to verify this



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jasecom89
User

Dec 4, 2012, 3:00 PM

Post #3 of 16 (1434 views)
Re: Chevy Blazer Hesitating and dying Sign In

Ok so assuming that it is the fuel pump(wont have the money to buy[and return later] the fuel pressure guage until friday), I called auto parts stores to price fuel pumps so I can make my repair a one day job, do I need just the fuel pump or the "whole assembly"? The difference between the two is about 150 dollars according to Oreilly's, but I dont know the difference or how to tell what I need?

p.s. approx how long with fuel filter replacement take?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 4, 2012, 4:01 PM

Post #4 of 16 (1428 views)
Re: Chevy Blazer Hesitating and dying Sign In

This one is probably going to be the whole assembly and you want to be real careful on the quality you buy. They have a very high failure rate. Delco is the best way to go but I have had good luck with Airtex also.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Sidom
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Sidom profile image

Dec 4, 2012, 9:07 PM

Post #5 of 16 (1415 views)
Re: Chevy Blazer Hesitating and dying Sign In


In Reply To
(wont have the money to buy[and return later] the fuel pressure guage until friday

A lot of parts houses have tool loaner programs on tools like this.........They are trying to avoid this exact situation.


MarineGrunt
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MarineGrunt profile image

Dec 5, 2012, 8:15 AM

Post #6 of 16 (1404 views)
Re: Chevy Blazer Hesitating and dying Sign In

Like Sidom said, go to a parts store and borrow one. My local Carquest doesn't require a deposit. They just take your contact info and you bring the tool back when you're done. Other parts stores, such as Auto Zone, make you put down a deposit which pretty much equals the cost of the tool. Once you bring it back you get your deposit back. I'd go that route instead of buying and returning an item when there was nothing wrong with it. Stuff like that causes stores to raise their prices. If anything, as a last resort, go to Harbor Freight and buy a cheap one. You'll then have one on hand for the next time you need it.


jasecom89
User

Dec 5, 2012, 10:16 AM

Post #7 of 16 (1393 views)
Re: Chevy Blazer Hesitating and dying Sign In

Curious if going with just the pump would be alright if I was planning on buying a new vehicle come tax time... Buying the whole assembly is more of quality assurance? Or are you suggesting that it is needed for my truck to run? Btw, will go to harbor freight for the pressure guage, dont have any carquest nearby


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 5, 2012, 10:17 AM

Post #8 of 16 (1390 views)
Re: Chevy Blazer Hesitating and dying Sign In

Advance and Autozone both have tool loaner programs too.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



jasecom89
User

Dec 7, 2012, 9:55 PM

Post #9 of 16 (1370 views)
Re: Chevy Blazer Hesitating and dying Sign In

Well I did a fuel pressure test and when running and revving under the hood the pressure kept about 55, after I killed it it remained around 50 for several minutes. Could it still be the fuel pump?


Sidom
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Sidom profile image

Dec 7, 2012, 11:14 PM

Post #10 of 16 (1366 views)
Re: Chevy Blazer Hesitating and dying Sign In

Those pressures sound good but you need to check the pressure when the problem is happening. If it running good when you test the pressure more than likely you will get good readings....


jasecom89
User

Dec 9, 2012, 11:03 PM

Post #11 of 16 (1346 views)
Re: Chevy Blazer Hesitating and dying Sign In

well after 8 hours of work and a new fuel pump the exact same problem persists... but it only does it at hwy speeds...


Sidom
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Sidom profile image

Dec 9, 2012, 11:42 PM

Post #12 of 16 (1344 views)
Re: Chevy Blazer Hesitating and dying Sign In

I'm not sure what caused you to pull the trigger on the pump but thats water under the bridge now......Is there ever a check engine light on? If so if you know how to jump the DLC with a paper clip, then get the code....

One quick thing you could do would be to disconnect the MAP sensor and take it for a drive (I don't think this is using a MAF but if it has one instead of a MAP, disconnect that & see if it makes a difference). Obviously you would want to pull codes before doing this, because this will set a code...


jasecom89
User

Dec 10, 2012, 12:00 AM

Post #13 of 16 (1340 views)
Re: Chevy Blazer Hesitating and dying Sign In

no, no check engine light... will try with the map sensor


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 10, 2012, 4:21 AM

Post #14 of 16 (1336 views)
Re: Chevy Blazer Hesitating and dying Sign In

You haven't learned your lesson yet? Throwing parts at it is not how cars are diagnosed. That how you empty a wallet.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



jasecom89
User

Dec 10, 2012, 8:05 AM

Post #15 of 16 (1325 views)
Re: Chevy Blazer Hesitating and dying Sign In

Well, for one I deal with a slight time schedule(work on weekdays until late) and something else happened which made me assume fuel pump... Fuel got low(not even on 'e') and my vehicle died, put some more fuel in it(almost up to a quarter of a tank) and it started and ran. But of course only going about 40 or so... but obviously I was wrong.. lol I bow to the knowledge of those wiser than I Shocked


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 10, 2012, 9:07 AM

Post #16 of 16 (1321 views)
Re: Chevy Blazer Hesitating and dying Sign In

What's your fuel pressure reading now?



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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