Fuel Pump Issues

Topic: Fuel Pump Issues (Read 1372 times) previous topic - next topic

Fuel Pump Issues

June 10, 2008, 12:03:53 PM

Well, I FINALLY got the paperwork straightened out so I can drive the car and I must admit, I'm quite impressed. It drove very well for having sat for three or four years. Anyways I drive it to work (30 miles), no problem. I drive to lunch, no problem. I get in to drive home--problem. The car starts up, runs horribly and dies. I try to re-start, engine cranks and cranks. Check for spark--good spark. Check for fuel--no fuel. Everyone's trying to help by looking at all the fuses and searching for the relay and that elusive impact switch that I can reset. I don't find any fuses, don't know where the fuel pump relay is and have pulled most of the carpet out of the trunk and have found nothing. My only alternative is to drop the tank and give the fuel pump 12 volts directly to see if it's working, which I'd hate to do, but will if I have to.

Any suggestions? It's an '86 Turbo Coupe. Is there a fuse for it? Where is the relay? Also, this switch--can't find it either. My Haynes manual is worthless and that piece of Chilton's book isn't even worthy of toilet paper in this matter. I'm open to suggestions.

Fuel Pump Issues

Reply #1 – June 10, 2008, 01:04:06 PM

Never mind...I just dropped the tank...Fuel pump is dead. Thanks anyways! :hick: :hick: :hick:

Fuel Pump Issues

Reply #2 – June 10, 2008, 01:05:30 PM

Do you hear the humm of the fuel pump when you turn on the key and it humms for about 2 sec?

Did you do a search on here?

have someone smack the bottom of the tank with a block of wood or a rubber hammer while you crank.

If it starts,, the fuel pump motor itself (burshes) are binding and it needs replaced.

Replace with adance auto pump for a 1990 3.8L super charged V6 fuel pump. That one is 90Lph vs your stock bosch 55-60Lph.

If it still does not start, ..........................
Locate the "inertia switch ie-reset switch"which could be right behind your license plate on the inside of the trunk or on the driver side behind all the covers. Its a littel box with a button and two red wires. Push the button back in if its out. If the button is not out,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Locate the fuel pump relay on the pass side behind all the covers up near the trunk hinge.
Turn on key and listen for a click. If you hear a click but no fuel pump hummm,, bang the shiznit out of the tank and it might start. ie-bad pump.

Tap on the relay while cranking the engine.

If it still does not start,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

locate the tan light green wire.
Tap into that wire with another wire. Ground out that wire to the vehicle.
turn on your key..................
Does the Fuel pump runn continuous? If no, replace relay.

if you replace the relay wtih a known good one (green top or equivelant) and it still does not start, could be a bad eec.
You can run with a bad eec if it starts with the tan/light green wire grounded all the time.

The tan light green wire also appears up at your eec test connector near the driver strut tower. It is an empty 6 pin connection usually having a single wire connector right beside it.

Did you search the site for any info? there are a lot of people who have posted about this stuff now and again and pics might be available as well.

alot of what i have said is out of order but for the most part it will get you started.

Fuel Pump Issues

Reply #3 – June 10, 2008, 01:10:12 PM

Thanks!

Well, I did all that--except for the inertia switch, now I know where it is at least! I tore the trunk up searching for it!

At least now I'm gonna stick a new pump in it. I should be running by quittin' time! ('Cause I just dropped the tank at work! :D )

Fuel Pump Issues

Reply #4 – June 10, 2008, 04:02:19 PM

Quote from: BlackCardinal;222878

('Cause I just dropped the tank at work! :D )

AHHH... The little perks... LOL

Fuel Pump Issues

Reply #5 – June 10, 2008, 05:28:53 PM

Ahhhh yes! Complete with lift and everything. Actually, one of the shop guys did most of the work for me--I bought his lunch and that was enough for him!

It's fixed and awaiting the drive home. I'm thinking about replacing that timing belt ASAP after what happened with this fuel pump!

Fuel Pump Issues

Reply #6 – June 10, 2008, 06:11:42 PM

Quote from: jcassity;222877

Do you hear the humm of the fuel pump when you turn on the key and it humms for about 2 sec?

Did you do a search on here?

have someone smack the bottom of the tank with a block of wood or a rubber hammer while you crank.

If it starts,, the fuel pump motor itself (burshes) are binding and it needs replaced.

Replace with adance auto pump for a 1990 3.8L super charged V6 fuel pump. That one is 90Lph vs your stock bosch 55-60Lph.

If it still does not start, ..........................
Locate the "inertia switch ie-reset switch"which could be right behind your license plate on the inside of the trunk or on the driver side behind all the covers. Its a littel box with a button and two red wires. Push the button back in if its out. If the button is not out,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Locate the fuel pump relay on the pass side behind all the covers up near the trunk hinge.
Turn on key and listen for a click. If you hear a click but no fuel pump hummm,, bang the shiznit out of the tank and it might start. ie-bad pump.

Tap on the relay while cranking the engine.

If it still does not start,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

locate the tan light green wire.
Tap into that wire with another wire. Ground out that wire to the vehicle.
turn on your key..................
Does the Fuel pump runn continuous? If no, replace relay.

if you replace the relay wtih a known good one (green top or equivelant) and it still does not start, could be a bad eec.
You can run with a bad eec if it starts with the tan/light green wire grounded all the time.

The tan light green wire also appears up at your eec test connector near the driver strut tower. It is an empty 6 pin connection usually having a single wire connector right beside it.

Did you search the site for any info? there are a lot of people who have posted about this stuff now and again and pics might be available as well.

alot of what i have said is out of order but for the most part it will get you started.

You had to pastin and sticken on that answer!

Fuel Pump Issues

Reply #7 – June 11, 2008, 01:06:40 AM

you lost me there??