Shagool22

Trying to start my fresh 22re rebuild in my 87 4Runner. Sounds as if it's not getting fuel. Checked lines all good, fuel pump is only working when I jump it to battery. Someone point me in the right direction here

DHWRIGHT

How long since last time it did run? when you say jumped the fuel pump to battery did you just put power to it and used the factory ground or did you put both + and - from pump to battery. I ask because you need to find out if the pump is not getting power or not getting a ground.

Shagool22

Uhhh... It's been sitting in the shop for the last 15 years. Was my dads and he gave it to me this last year.

And yes I just put power to it and used factory ground.

DHWRIGHT

Have you checked the fuses and EFI relay?

wyoming9

iTrader: (1)

Have you jumped B+ to FP in the check connector to eliminate the relays and switch in the AFM ??

See if it powers up then.

Go from there.

rustypigeon

This wiring diagram will show you what you need to check with your multimeter...

http://personal.utulsa.edu/~nathan-b...28fuelpump.pdf



.

scope103

Is the Induction plumbing (the big black hoses from the air-cleaner stuff to the throttle body stuff) all hooked up? You don't have a carburetor; if that stuff is disconnected the fuel pump is shut off. If so, follow wyoming9's advice.

Shagool22

Yes I have checked efi fuse but haven't checked relay yet. Where's it located?

Wyoming- I will give that a try and let you know from there.

Rusty- thank you for the link, helps a lot!

Scope- yes it's all plugged in. Will double check here in a min..

Shagool22

Did this and pump runs fine. What do you think now?

wyoming9

iTrader: (1)

It is either a open fuse

Damaged wiring.

Bad EFI relay or Circuit open relay.

EFI relay should be in the fuse block behind the left kick panel

The Circuit Opening relay is in the area of the right door post above the ECU

These are the stock locations

scope103

It's not the EFI fuse or EFI relay; they provide power to B+, which you just used to run the fuel pump.

Does it run with the jumper? If so, your problem is in the VAF/COR circuit. Use the FSM and a multimeter to test each (the VAF is much easier to get to, so start there).

DON'T drive around with the jumper installed. The purpose of the COR is to shut off the fuel pump in the event of an accident that breaks a fuel line. If you have that accident with the jumper in place, we'll only hear about it on the 6 o'clock news ....

rustypigeon

x2.

Go to page EG1-195 on the following link. You want to check VAF terminals E1 and Fc for continuity when the measuring plate is open.
http://personal.utulsa.edu/~nathan-b...33volumeai.pdf

If that checks out ok, check the COR using the procedure on this link...
http://personal.utulsa.edu/~nathan-b...38circuito.pdf

.

wyoming9

iTrader: (1)

I was thinking all after noon I forgot or missed something on this.

Shagool22

Scope- no the truck does not run with the jumper, it want to but just won't wuite stay alive.
Can hear the pump loud and clear.

Still stuck

rustypigeon

Might have low fuel pressure, or the timing might be too far off.

Have someone rotate the distributor while you crank the engine to see if it will catch.

Did you check for spark?

Shagool22

Yup Ive got spark. She just fired up for about 30 seconds before cutting out. Think timing is still too far out?

rustypigeon

Did it fire for 30 sec while rotating the distributor? You might have the distributor on the wrong tooth.

http://personal.utulsa.edu/~nathan-b.../5distribu.pdf

Use this link to make sure the distributor is positioned correctly.

Shagool22

Yes I've redone distributor multiple times. Same issue. Fires up to about 1500 rpm. Then slowly declines and dies. If I touch gas pedal at all it dies instantly

rustypigeon

Does it run smooth up to 1500rpm?

I would check that the injectors are all firing. If you can get access to a fuel pressure tester you could eliminate poor fuel pressure as a culprit.

tham1992

I had the same problem and actually had a broke wire in the fuel tank