1995 Chevy S-10 performance issue

IONBATHE

MEMBER
1995 CHEVROLET S-10

Engine Performance problem
1995 Chevy S-10 4 cyl Two Wheel Drive Manual

my 1995 s10 runs great until about a week ago. Vehicle will start up fine and runs great for about 1 mile then starts to spit and sputter, coughing and backfiring. The truck sometimes shuts down and I have to wait a minute to restart. Usually afterwards, the truck runs fine. I replaced plugs and wires, fuel filter and added injection cleaner to no improvement. Also, sounds like its running on 3 cylinders (louder than usual)!

3 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Oxygen sensor
Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires

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Saturday, August 22nd, 2009 AT 1:54 PM

IONBATHE

MEMBER
2 POSTS

Hello again, I have the s10 that spits and sputters, coughs and backfires.

I have changed the plugs, wires, fuel pump and fuel filter. Now. Vehicle will not crank. Could it be the coil?
Does a coil work sometimes and then quit all together?
Before, truck would crank up but die after a few minutes. Then, would run fine for awhile. Now. Will not crank.

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Tuesday, August 25th, 2009 AT 8:00 PM

RASMATAZ

MECHANIC
75,992 POSTS

Check your fuel pressure don't rely on new pump might not be producing the correct fuel pressure, and for the coil when its cold could be working good but when it heats up it goesw whack!-Check the resistances on it

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Wednesday, August 26th, 2009 AT 1:22 PM