Efi Runs Normal For About A Mile Then Stumbles Snd Dies

[Johnatthebox]

Hi. My car-(73 elco 383sbc with holley steath ram , bbk thrtlebody, accel gen 7 dfi, msd 6a, etc.) is throwing me for a loop again. I can start it up and drive for exactly 1 mile and it stumbles, surges, and wants to die. I mean exactly one mile too. At the same point /distance from my home. Then ill park it, wait about 15 min, start it up and drive home. Right when i get to my driveway itll start doing it again. Wash rinse repeat. Its fouling plugs really quickly too. I have good fuel, good fuel pressure, ignition timing ok, fuel filter ok, air/fuel mix is 14.5ish) , IAC valve is good-
Im hoping its not the ECU. Its just wierd how it goes for a mile then gets wonky. Any ideas?

 

[Grumpy]

first, I'd try timing the drive time to failure not just distance,
to get some idea as to the time, not the distance,
and then let the car/truck idle and with you in the drivers seat occasionally giving it a bit of throttle to raise rpms ,
just too see if it exibit's the same issue at about the same time frame sitting in your driveway,
it may be a heat build-up electronic issue
hei and similar ignitions do frequently have a issue with failing due to increased heat,
obviously pull trouble codes if you can do that on the accel gen 7 dfi, msd 6a

obviously verify if its getting ignition spark and use a noid light to test injector pulse if its quit,

youll need a MULTI METER AND A FUEL PRESSURE TEST GAUGE

http://www.harborfreight.com/fuel-injec ... 92699.html
http://www.harborfreight.com/fuel-injec ... 92699.html

you need to isolate the problem to ignition or fuel delivery issues

http://garage.grumpysperformance.com/index.php?threads/code-45-problem.15753/#post-94288

http://garage.grumpysperformance.co...rical-glitches-in-newer-cars.5492/#post-18411

http://garage.grumpysperformance.com/index.php?threads/calculate-fuel-injector-size.1200/#post-93284

http://garage.grumpysperformance.com/index.php?threads/engine-quit.7085/#post-23611