Fuel injector problems with an S-10 Blazer . . .
Can't get cold start without starter fluid, or by first switching on
the ignition to run the fuel pump 3 or 4 times in succession before
I brought it in for a fuel pump pressure test. It registered slightly
below specs, and this is apparent from the way it wants to stumble or
fail at start up with the ignition priming procedure or any hot start.
So, it will, at times, start hot, but weakly.
Trouble is, you hear differing opinions, some guys saying that a fuel
pump either works or it doesn't. Since the car runs without stumbling
or quitting once it gets started, this might seem to support their
view, except that you consider how vacuum is induced to the fuel line
once the engine is up and running, which might well explain why it
runs fine once it gets started, and why it's hard starting without the
aid of that suction from the manifold.
The problem got started not long after I stupidly put some cheap,
bargain priced fuel treatment in the tank. It had the odor of that old
fashioned carb cleaner. I thought maybe it might have dislodged some
gunk from the tank, to clog up the fuel filter, so I replaced that.
Going on the assumption that the mechanic who ran the test was right
on the money (my money, the 500 bucks he was talking) about the fuel
pump needing to be replaced, then that's the job I'm going to be doing
myself, to keep that money, so much as I can, in my pocket instead of
his. So here's the thing . . .
I talked to a guy the other day who told me he had the same problem
with his car, and fixed it by an easy workaround: he bought an
external electric fuel pump; didn't have to drop the tank. It must
have been somebody else who did the work for him, because he couldn't
tell me what was done with the wiring.
Obviously, they just left the bad in-tank pump where it was, since
there was no dropping of the tank required. Pressure from the external
pump would simply suck the fuel right through the in-tank pump,
turning the impeller just like wind through the window driving the
blades of a switched off fan--nothing to it. Best I can figure, they
must have simply disconnected the wiring harness from the old pump and
connected it to the new in-line pump, where it was mounted to the
chassis along the fuel line somewhere between the tank and fuel
The guys down at the auto parts store were horrified to hear this,
predicting all sorts of disaster for the computer and many another
thing. Even so, the man who told me about it swears that it fixed him
up, and gave him no such trouble, working just fine from that time on.
So what you all think--or what have you heard, or seen, or done,
I do find a "Mr. Gasket" micro-electric fuel pump at O'Reilly's for
about 40 bucks, but on their website they stress "NOT for fuel
injection". Clearly, you'd need to get a pump that delivered the
correct pressure and volume to the injector, which might require a
pump of a slightly higher capacity than the in-tank pump, since it
would work against more resistance with that extended intake line.
It begins to sound kinda hairy, I guess.