1998 S-10 Blazer Acceleration Problem


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Old 07-22-07, 12:39 PM
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Question 1998 S-10 Blazer Acceleration Problem

HELP!!!
I have a 1998 S-10 Blazer 4.3L That when it warms up it will not accelerate it bogs down or dies.

OBD2 codes p0147, p0452.
Fuel pressure at key on 65 pounds at idle 60 pounds.

Have done:
New fuel cap
New Exhaust to include Cat.
New O2 Sensors
New plugs
New plug wires
New Cap and Rotor

Any help will be greatly appreciated.
 
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Old 07-22-07, 02:29 PM
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Maybe fuel pressure regulator putting out to much. Reason it is better when engine cold is car can run richer when cold. Pull a plug and see if it is full of black soot.
 
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Old 07-22-07, 07:50 PM
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FYI

P0174= O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 3)

P0452= EVAP Emission Control System Pressure Sensor Low

You might take it to a local Autozone and have them clear the codes and start fresh. Something I ran into with a 99 S10 Blazer 4X4 was the MAF would throw a code. The truck lacked power and got poor fuel mileage.
 
 

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