Possible Fuel issue 1992 Chevy Blazer TBI 5.7l


Asked by Oct 06, 2016 at 09:52 AM about the 1992 Chevrolet Blazer Silverado 4WD

Question type: General

Having troubles with my Blazer, runs fine
when at idle, can rev the motor up while in
park, neutral or even in gear but only while
the vehicle is not moving. Once I'm on the
road driving, the truck will not quickly get
up to speed, nor will it allow me to get over
around 45-50 mph, and when I try to
exceed my speed or downshift, the truck
spits and sputters and just won't
accelerate correctly. Just recently replaced
the fuel pump a week ago, from the same
issues, and is now repeating the same
thing over again. I'm aware it could be that
the fuel pump is maybe a defective part,
but could there be some issue causing
these pump to short out? Or some way
that the pump is still getting power at
times, and not getting power at other times
causing it to do this.

4 Answers


Wouldn't be a fuse. Check fuel filter to make sure ur not chasing the wrong issue, it could be ur catalytic converter, spark plugs, wires but i would check fuel pressure first before u decide to replace pump again


Irodri911 plugs and wires and fine, I have no cats, was like that when I bought the truck a few months ago, and it's putting around 40psi fuel pressure wise. Was debating whether it could be a sensor, or maybe coil. It seems to not do it when the temp hasn't reached normal running temperature. So I pulled the coil and threw one I had lying in the shop on it, still same result. Now in the direction that maybe it could be coolant temp sensor? Or possibly something to do with distributor/timing. Still stumped on it.


There's the problem. The truck normally runs in open loop meaning it burns more gas, once it reaches normal running temperature, it switches to closed loop and fuel feed is based on Co2 sensors feedback. If you don't have the catalytic converters, the ECM doesn't know how much fuel to send. 2 options would be to either install the cads back on or remove the temperature sensor so it always runs in open loop but it will burn more fuel.


I'll give it a shot. Thanks!

Your Answer

Add photo

Related Questions


Looking for a Used Blazer in your area?

CarGurus has 1,634 nationwide Blazer listings starting at $1,999.


Search Chevrolet Blazer Questions

Chevrolet Blazer Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 1,690
#2 yetilikesbeer
Reputation 1,010
#3 dandyoun
Reputation 630
View All

Related Models For Sale

Used Chevrolet S-10"
9 Great Deals out of 1,809 listings starting at $1,749
Used GMC Jimmy"
373 listings starting at $1,900
Used Ford Explorer"
1,365 Great Deals out of 72,128 listings starting at $300
Used Ford Bronco"
219 listings
Used Jeep Grand Cherokee"
1,201 Great Deals out of 74,214 listings starting at $1,500
Used Jeep Wrangler"
443 Great Deals out of 16,379 listings starting at $2,500
Used Chevrolet C/K 1500"
1,150 listings starting at $2,400
Used Chevrolet Camaro"
826 Great Deals out of 39,073 listings starting at $2,650
Used Ford F-150"
3,259 Great Deals out of 217,203 listings starting at $1,000
Used Chevrolet Suburban"
670 Great Deals out of 24,304 listings starting at $1,985

Used Cars For Sale

2005 Chevrolet Blazer For Sale
13 listings starting at $3,450
2003 Chevrolet Blazer For Sale
152 listings starting at $3,495
2001 Chevrolet Blazer For Sale
226 listings starting at $3,850