86 runs dies
Thread Starter
Safety Car
Joined: Feb 2007
Posts: 4,684
Likes: 107
From: Opelika Alabama
86 runs dies
I guy I met has an 86 he's changed the fuel pump a couple of times and what he calls the fuel regulator "alittle black box under the hood" car starts runs for a few minutes and then dies doesn't matter if you put in in gear or not it just runs and then dies ANY IDEA"S???? I think the car is an auto tranny
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
He probably changed the fuel pump relay. It should come on for 2 seconds when the ignition switch is turned on. It then turns off so the fuel pump won't run continuously if the ignition is turned on but the engine is not started. The fuel pump relay turns on whenever the engine is rotating, whether cranking or running.
The best way to troubleshoot this is to put a fuel pressure gauge on the fuel rail and see what happens. Check the gauge when the ignition is first turned on (without cranking), when the engine is running and after the engine is shut off (the pressure should hold for at least 15 minutes).
The best way to troubleshoot this is to put a fuel pressure gauge on the fuel rail and see what happens. Check the gauge when the ignition is first turned on (without cranking), when the engine is running and after the engine is shut off (the pressure should hold for at least 15 minutes).
Burning Brakes
Joined: May 2011
Posts: 838
Likes: 2
From: Louisville Ky
I guy I met has an 86 he's changed the fuel pump a couple of times and what he calls the fuel regulator "alittle black box under the hood" car starts runs for a few minutes and then dies doesn't matter if you put in in gear or not it just runs and then dies ANY IDEA"S???? I think the car is an auto tranny
Like Cliff says, it seems to be running out of fuel, but there is a backup to the fuel pump relay that should keep the pump running. the fuel filter may be clogged, or many other things.
the tests cover several pages in the Factory Service Manual.
Thread Starter
Safety Car
Joined: Feb 2007
Posts: 4,684
Likes: 107
From: Opelika Alabama
if he knows how to pull the codes from the computer, I would start there. Auto-zone or others may do that for free. I can send you the test portions of the 86 FSM if you want.
Like Cliff says, it seems to be running out of fuel, but there is a backup to the fuel pump relay that should keep the pump running. the fuel filter may be clogged, or many other things.
the tests cover several pages in the Factory Service Manual.
Like Cliff says, it seems to be running out of fuel, but there is a backup to the fuel pump relay that should keep the pump running. the fuel filter may be clogged, or many other things.
the tests cover several pages in the Factory Service Manual.
