1999 Chevy Blazer Computer?

HDALE

MEMBER
1999 CHEVROLET BLAZER
6 CYL
4WD
AUTOMATIC
10,600 MILES

On acceleration it engine seems to slip and feels like it isn't getting fuel. Eventually it catches up with itself and drive fine until I slow down or come to a stop. The check engine light is on as well. After taking it to a shop and having it hooked up to a diagnostic computer they said it was a bad computer and that it was skipping 1st and 3rd gears. I changed the computer and it is still doing the same thing and the check engine light is still on. Any ideas on what could be going on?

Sunday, November 15th, 2009 AT 3:19 PM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

You sure tranny is not slipping?

Scan the computer again-nothing shows up -check the following below

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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Sunday, November 15th, 2009 AT 4:07 PM