I'm hoping some of you might be able to provide me with some guidance.
My 1997 s-blazer (4x4, 4.3L) has been stalling, somewhat randomly. The
problem started out to be very infrequent, maybe once every couple months
last summer/fall. The first time I thought it was wierd, and I hoped maybe
it was a fluke. It wasn't predictable enough at that time to really track
down or reproduce.
Over time, it has grown more frequent. Now, it seems to be a daily
occurance, usually 2-4 times a day.
Here is what I've been able to put together:
I sometimes have to crank the engine a second time before it starts (cold or
The truck is always in gear (forward or reverse) when it stalls
It occasionally stalls while idling at a light or stop sign
It occasionally stalls while braking
It occasionally stalls while coasting/driving <30MPH or so
-It is common in parking lots, pulilng in/out of spaces, driving slowly
-pulling in and out of driveways/parking lots (into traffic!)
is a little bit sluggish merging on the freeway
Pressing the accelerator at just the right moment can sometimes avoid the
My wife said that it doesn't accelerate as quickly as it used to, but I
haven't noticed that when I've driven it. It's seemed to run as strong as
ever to me. It is possible that she had the AC compressor running at the
time. I don't drive it as much as she does though, so maybe she is right.
I usually drive my pickup (K1500 with a 4.3L, 33x12.5R15's, and 4.10 gears),
and compared to it, the blazer is a rocket, so my preception of acceleration
may be a bit skewed.
Any suggestions on where to start looking for the problem? I'm at a loss as
to how to track this problem down. I don't get a steady check engine light
(does this mean that there aren't any codes being posted?), and the blazer
almost always starts right up on the first try (although, sometimes stalls
again as soon as it's put into gear). When the engine dies, I get the dash
lights for "check engine", "ABS", and "airbag", but they all go off as soon
as the engine is restarted.
I've checked the battery terminals to make sure I didn't have a loose
ground, but they were clean and tight. I've also tried to wiggle every
connector under the hood that I can get my hands on, but I haven't found a
loose connection yet.
For what it's worth, the fuel pump and filter were replaced about 15 months