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Posted: Sun Aug 19, 2012 10:47 am
by impulsive
IZU069 wrote:Maybe power the fuel pump(s) direct in case they are not being kept on.
Tried that. Wired 12v direct to the pump to keep it on. Same business.
IZU069 wrote:I assume you have the ITEC ECU (optical distributor; locked)
Correct. Could the distributor still be at fault?
IZU069 wrote:But you should NOT be getting an over-high fuel pressure. Either the pressure regulator is wrong, or there is a return blockage. (Or your fuel tank shares the same pressure!)
But others are more knowledgeable on that issue.
Well, my fuel pressure is still high, but from everything I have read, high fuel pressure should not kill the engine. It might run at high RPM and run rich, but the engine should not die. Low fuel pressure is a different story however.

I dropped the fuel tank, cleaned it out, let it dry, replaced any remaining rubber that I did not replace already, new fuel filter, pressure regulator, damper, and blew the lines out, both feed and return with my compressor. Not blockage as far as I can tell.

There is something telling the car to shut off. Its got to be an electrical issue. Something like a fail safe or something. Its the only thing that makes sense. I have not tried replacing the distributor, but my timing is good and dead on now.

Bart

Posted: Sun Aug 19, 2012 5:06 pm
by ImpulseRocket89
Too much fuel at idle can and will stall out an engine. It's the main reason why vehicles with Faulty O2 sensors stall out, because the ECU is in a "safe" mode and staying rich.

It sucks that you are still fighting this problem...

Posted: Sun Aug 19, 2012 8:33 pm
by IZU069
And since rich mixtures (or petrol/fuel) are the biggest killers of O2 sensors....

Posted: Thu Jul 24, 2014 3:23 pm
by yhamaie
impulsive wrote:After I took possession of the car, I discovered that what was actually removed was one of two fuel dampers, not the actual FPR.
I would like to inform you that I have just installed a BOSCH 0280161024 (replacement part for BMW and Alfa Romeo cars manufactured in late 70s - early 80s)

http://www.autopartoo.com/oem/bosch/0280161024.html

in place of the original fuel pulsation dampener (aka fuel damper).

Please also refer to http://www.isuzupiazza.com/forum/viewtopic.php?p=13672 .

Posted: Fri Jul 25, 2014 1:34 am
by impulsive
Cool! Thanks for this info!

Bart