2001 S-10 Blazer problems

I am have been using a large amount of fuel lately and when i took it to a mechanic, he stated that it could be one of two things. the first be a new fuel pump, or the second a new computer since when he tried to hook the Scanner up to the truck, there was no power. would a blown fuse be the reason why there was no power to the scanner?

Don't go back to that mechanic....it could be lots of things he just picked the ones that would make him the most money.

Is the SES light on?
When was the last time it had a tune-up?
Does it run okay? Any spitting, sputtering, or stalling? Rough idle?
Do you smell fuel?
Where does the temperature gauge read when it is warmed up?

I am have been using a large amount of fuel lately and when i took it to a mechanic, he stated that it could be one of two things. the first be a new fuel pump, or the second a new computer since when he tried to hook the Scanner up to the truck, there was no power. would a blown fuse be the reason why there was no power to the scanner?

Welcome to the Forum. Please provide us with a little more information. Did this problem just start recently or has it been gradual? Has any work been performed recently? Have you had your "Check Engine" light come on? When was the last time this truck has had a tune-up? Have you noticed any other symtoms, such as rough idle, stalling, hard starting, smell of raw gasoline under the hood, in the exhaust, or in the cab? Do you do your own work at all, or do you basically let the garage do it? What is your Gas milage?

I don't know that your mechanic really knows what he's talking about, there are dozens of things that can cause excessive fuel consuption, but I don't believe that a bad fuel pump will cause excessive fuel consuption. Was this mechanic at a licensed garage?

If possible you might take this into a different garage before spending a dime and get a second opinion. Both of these "Fixes" are expensive, high dollar fixes that might not be your problem!

Post back with as much information as you can and be as specific as possible. There are many mechanics on this Forum that will help steer you in the right direction.

Don't go back to that mechanic, since when does a friggin fuel pump cause bad mileage.

What an idiot.

Start by doing the normal things like a tuneup.

Is the SES light on? Nope

When was the last time it had a tune-up? that was one thing on my list

Does it run okay? Any spitting, sputtering, or stalling? Rough idle? Runs Fantastic

Do you smell fuel? Nope

Where does the temperature gauge read when it is warmed up? tempreture gage reads normal.


I just dont know what to do, i am practicly doin 15 miles to a gall. may be even less!!!

sorry for the lack of information, currently when i first start it up after it being off for a while it will hard start. my check engine light came on a while ago and a Mecanic at Jiffy Lube told me it was an External Emmitions problem.. He seemed clueless as well as I. so he reset the computer and it hasnt come on since. other then that, like i said i have not smelled raw gas anywhere. and when i conducted a pressure test, when i start the vehicle i am sapose to have 60psi and it should then go down to 3-10psi but when we did my vehicle, it stays at 60psi. i hope all of this information can help you guys.

Where exactly does the temp gauge go....1/4....1/2? This is pretty important because stuck thermostats are common on these vehicles, if the thermostat is stuck open it won't allow the system to warm up enough to enter closed loop...this will hurt fuel economy. If stuck it may get real close to the right temperature, but just not quite enough to go into closed loop. We should rule this out before going into any more complex problems. A tune-up would probably help out...how many miles are on it? A bottle of techron may show some improvement too.

The pressure stays the same when started? How about if you rev the engine a little?

Not changing when started indicates a problem with either the regulator or the vacuum line going to it.

there are 68,000 on the blazer, and the tempreture gage goes to 1/2

well its not a vacume line cause we ruled that out. but either way it will be spendy since the fuel regulator is in the tank

Temp is fine. You are just a little past the recommended time for a tune-up, so you will probably see a slight improvement.

No the fuel pump, pulsator, and sending unit are in the tank. The regulator is on the engine.

I tried lookin for the reg today and could not find it. the mechanic said that it was possibly an in-tank reg

Nothing wrong with the fuel system, so leave it alone. PERIOD

Go and do a tuneup. You know you haven't done it, you know it needs it, THEN WHY ARE YOU NOT DOING IT AND TRYING TO FIND SOME OTHER SOURCE OF THE PROBLEM.

Nothing wrong with the fuel system, so leave it alone. PERIOD

Go and do a tuneup. You know you haven't done it, you know it needs it, THEN WHY ARE YOU NOT DOING IT AND TRYING TO FIND SOME OTHER SOURCE OF THE PROBLEM.

You can't say there is nothing wrong with the fuel system. If the pressure doesn't change when the engine is started..that is an indication there is a problem with the regulator or the vacuum going to it.

And yes it is time for a tune-up.

I am have been using a large amount of fuel lately and when i took it to a mechanic, he stated that it could be one of two things. the first be a new fuel pump, or the second a new computer since when he tried to hook the Scanner up to the truck, there was no power. would a blown fuse be the reason why there was no power to the scanner?


For reference What IS your gas mileage anyway....???

A "large amount of fuel" doesn't really tell us anything.....are you get less than 10 MPG...THAT's a LARGE amount of fuel....

For reference What IS your gas mileage anyway....???

A "large amount of fuel" doesn't really tell us anything.....are you get less than 10 MPG...THAT's a LARGE amount of fuel....

It's not that bad, he said about 15mpg.

It's not that bad, he said about 15mpg.

For comparison, my stock 2000 Jimmy gets 18-19 MPG average. But I do approx. 60% highway driving.

For comparison, my stock 2000 Jimmy gets 18-19 MPG average. But I do approx. 60% highway driving.

From what I've read in the other threads, mine is really good. I get 20 city and up to 26 highway. Chevy says 18/25. I think mine is better because of the slighty oversized tires, big enough to get a little farther per rotation, but not so big that they put any extra strain on the engine.

I would still be looking in doing a tuneup, the fuel pressure is not a problem here.

Yeah I would do a tune-up too. The whole deal none of the half-assed stuff people try to get away with. Plugs, wires, cap, rotor, pcv valve, air filter, fuel filter. I would run a bottle of tech-ron through too. But the pressure shouldn't be ignored, I just can't see a 2001 with 68,000 miles getting MPG that bad and only needing a tune-up. I guess we'll see how much it improves after the tune-up and go from there.

Yeah I would do a tune-up too. The whole deal none of the half-assed stuff people try to get away with. Plugs, wires, cap, rotor, pcv valve, air filter, fuel filter. I would run a bottle of tech-ron through too. But the pressure shouldn't be ignored, I just can't see a 2001 with 68,000 miles getting MPG that bad and only needing a tune-up. I guess we'll see how much it improves after the tune-up and go from there.

A four year old vehicel with 68k on it and lacking a tuneup could easily shave 3-4 MPG off.