1. Home
  2. Chevrolet Trucks
  3. 89` Blazer Stalling

89` Blazer Stalling

Hey guys, I need a little help please. BIO: 1989 S-10, 4X4, 4.3L W/TBI with about 160 K on her.

Problem is she keeps try to stall on me on the way home from the "salt mines". I drive the same route each day and she starts to fail at the same spot during the trip home. The run is about 20-30 min total. All but the last 10 min. are stop and go 40ish mpg. The last 10 min is about 55 mph. At the end of the 55 mph run I stop for a signal. At that same signal she falls flat and start to die. I can pump the gas and still move but the last 2 miles she run like pooh. Does this sound like a fuel filter maybe?

It's just so weird at the same spot coming home. No prob. going to work!

Tanks, JQP

Reply to
John Q Public
Loading thread data ...

EGR valve possibly, or EGR solenoid not closing the valve after you get off the highway. The EGR valve only opens at highway speeds, when TPS input is constant. So, during your final 55 mph run the ECM is opening the EGR valve to lower NOx emissions, and as you get off the highway and come to a stop, it close the valve. If the valve is old and cruddy the pintle could be sticking and hanging open, or the solenoid might not be doing it's job either.

This causes a lean condition and will have her running like ass till the pintle closes. If it were the fuel filter you'd be having problems at 55 mph as that's where the engine is sucking the gas, not at the end of the off ramp when it's hardly using and gas at all.

Next time it happens, kill the ignition and turn her off. Let sit for maybe

5-10 seconds and then restart. Let's see if whatever it is resets itself.

Doc

>
Reply to
"Doc"

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.