I am having some problems, and am not sure if they are related or not. It
is a 1988 S-10 4.3l 4x4 Vin Z TBI. New 4.3l motor roughly 10k ago, new O2
sensor 5k ago, new fuel filter 9k ago. Cap, rotor, wires, plugs new with
motor. 130K or so on vehicle. EGR is fine, PCV valve seems to be fine (new
with motor). No Codes in computer.
A week ago, I was driving home from softball down the freeway, and the truck
quit running. It bucked once, sputtered, and died, I was going about 65mph.
I strong armed it across 4 lanes of traffic, fortunately traffic was light
at that moment, and got it stopped. Fuel was at nearly empty, but from
years of driving this truck, I knew I had 2.5-3 gallons left in the tank, so
no big worry. After cranking a bit, it acted like it was flooding, so I
popped the hood and flipped the lid on air cleaner, but it didn't smell
strongly of gas as I might have expected. I cranked a bit more, and it
started up. I limped it down the freeway (with my lady friend following) to
a gas station. I filled it up, and haven't had a problem since.
Other info: In the past few weeks, I have had it stall on me a couple of
times at start up -- after running for a second it dies. Fires right back
up, but I have found that I have to goose the throttle on the restart or it
blubber and dies a second time. Within seconds it evens out and runs fine.
This has happened 3 or 4 times, so not with regularity, but never happened
I have also noticed that a bit off idle, the truck seems to loose power (not
sure if it's leaning out or loading up, I'm inclined it's not excess fuel).
I also notice a
"flutter" as I go down the freeway at higher speeds. I notice the loss of
power after each gear shift (it's auto). This isn't extreme loss of power,
but enough to notice it
The battery is due to be replaced this fall, though I don't see that as the
problem. I suspect injectors or fuel pump, but don't know enough about the
characteristics (nor diagnostics) of fuel pumps to justify that thought. It
is not air delivery, and I don't think it is spark related, which leaves me
fuel. I ran some Techron Fuel Systems Cleaner through on this current tank
of gas (takes a week or two to burn a tank of gas usually), but I have not
notice much change (though only 60 miles into it). The visible spray of the
TBI seems normal, though I realize that's not a good indicator.
I'm somewhat stumped, and don't want to just start throwing parts at it. I
have a 250 mile trip (one way) on Wednesday, and sure don't want to be
stranded in the middle-of-nowhere Southwestern Minnesota.
An unrelated note: I tinted the windows of my topper this past weekend.
What an amazing temperature difference that makes in the box area. it was
pretty easy to do (I removed the windows from the topper) as I tinted the
windows in my living room. Not professional quality, but considering the
price, and my experience with applying tint (none) I'm pleased with the
results, especially on the back window. My main concern was mostly making
it difficult to see into the topper at night, to avoid prying eyes (golf
clubs, sometimes tool box are back there). The heat reduction was a side