jhksclemm
Need a Spot
Reged: 02/25/07
Posts: 6
|
|
I have an 85 Toyota 4x4 with the 22re. My fuel injectors are not getting any voltage. Can anyone tell me what I need to look for to solve this problem?
|
kewlynx
Toyota & Classifieds Moderator
Reged: 10/06/02
Posts: 15756
Loc: Fairbanks, Alaska
|
|
Hi, welcome to the board!
Bookmark 4Crawler's website; you'll refer to it often!
http://www.4crawler.com/4x4/CheapTricks/index.shtml#FuelPump
Check your EFI and IGN fuses. If you don't have the fuse cover anymore, you can see the drawing at the same website above.
Also check your ignition components.
We have an '85 FSM sticky'd here for your use; follow the download instructions. The FI section is the one you need.
What maintenance have you done to this rig up to this point? If you've been fooling around with the injector harness at all, the injectors are spliced in with butt connectors. Unwrap and solder those puppies instead. This is a common problem with the older Yotas. SO, once you get it running and it has a funky miss, chances are likely this is the culprit.
That should get you started for now.
--------------------
http://www.walkablecommunities.org/
Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote.
**ubi apis- ibi salus**
|
dcg9381
Rock Warrior
Reged: 10/05/00
Posts: 669
Loc: Austin,TX
|
|
How are you measuring them? With the key on, you should see voltage between injector and a ground point. No voltage between terminals.
--------------------
22REturbo.net
1988 4Runner
22RTE core, turbocharged, megasquirted...
|
jhksclemm
Need a Spot
Reged: 02/25/07
Posts: 6
|
|
Ok, here's where I stand at this point.
The engine will try to fire with starting fluid.
I have 12v at #10 and #20 on the ecu.
E01 and E02 showing to be grounded.
12v from the resistor.
12v at the injector plug with key on.
Signal generator in the distributer ohm'ed ok and set gap to .010.
Getting 1.09 v at IGT on the ecu while turning engine over.
Getting .75v at IGF on the ecu while turning engine over.
Have 12v at NE on the ecu with key on.
I am getting fuel to the rail.
Hooked up a niod light the the injector plug, and am getting no signal.
will this information help anyone figure this out?
My wiring harness is grounded to the intake.
I found two plugs and one wire that I don't have a clue where they go.
the two pluges are the type like the ones that go to the fuel injectors (with the wire clip). One has a blue and white with black stripe wires the other has a black with yellow strip and black wires
the single wire is light green with red stripe.
|
dcg9381
Rock Warrior
Reged: 10/05/00
Posts: 669
Loc: Austin,TX
|
|
I'm not familiar with the factory specs for IGt and IGf when turning the motor over, so I assume you're doing it correctly.
Do you have spark? IF so, this indicates that your ignitor and ECU are functioning and know to fire.
If you've got 12v at the injectors, then the only thing that remains is to fire them via grounding them at No.10 and N0.20 at the ECU. These are actually the same connection in most trucks/4runners, except for the turbo as the harness is merged in the engine compartment.
What I'd do is test for continuity (with the engine off) between the injector(s) and pins No.10 and No.20 at the ECU. You should get continuity.
The other thing I'd check is the REST of the engine grounds at the ECU. Senor grounds are different, but there are 3 engine grounds total, not counting sensor grounds:
http://lakebox.dnsalias.com/photos/1988%204runner/megasquirt/ecupinoutdiagram.JPG
Last, I'd plug the ECU back in and check for continuity between ground and No.10 and No.20 (seperately) while turning the truck over.
My guesses:
1) Incorrect ground somewhere - test all 3
2) Broken connection between the ECU No10 No20 and injectors <--- (most likely)
3) Bad ECU
--------------------
22REturbo.net
1988 4Runner
22RTE core, turbocharged, megasquirted...
|
jhksclemm
Need a Spot
Reged: 02/25/07
Posts: 6
|
|
I checked continuity between ground and # 10 & 20 while turning over engine read fine.
Checked continuity between injectors & 10 & 20 with engine off read fine.
Is the only thing left the ECU?
|
jhksclemm
Need a Spot
Reged: 02/25/07
Posts: 6
|
|
One other thing. when you are checking the distributor signal generator should it read open until it is closed by the signal rotor?
|
dcg9381
Rock Warrior
Reged: 10/05/00
Posts: 669
Loc: Austin,TX
|
|
Quote:
I checked continuity between ground and # 10 & 20 while turning over engine read fine.
Explain. 10 & 20 should pulse to ground.
If you check 10 & 20 with the ignition on, not turning over, you should read 12v between those points and ground (this is with the ECU plugged in)
When turningn over, you'll see voltage vary as they get pulsed to ground.
Quote:
Checked continuity between injectors & 10 & 20 with engine off read fine.
Meaning you had continuity between the injectors and 10 / 20, correct?
Can you confirm that 10 / 20 are pulsing to ground when you're turning it over?
--------------------
22REturbo.net
1988 4Runner
22RTE core, turbocharged, megasquirted...
|
jhksclemm
Need a Spot
Reged: 02/25/07
Posts: 6
|
|
Quote:
Quote:
I checked continuity between ground and # 10 & 20 while turning over engine read fine.
Explain. 10 & 20 should pulse to ground.
If you check 10 & 20 with the ignition on, not turning over, you should read 12v between those points and ground (this is with the ECU plugged in)
When turningn over, you'll see voltage vary as they get pulsed to ground.
((( I read 12 volts between those points and ground. with the ecu plugged in. and while turning engine over the voltage varied.)))
Quote:
Checked continuity between injectors & 10 & 20 with engine off read fine.
Meaning you had continuity between the injectors and 10 / 20, correct?
((( I had continuity between the injector plug and 10 & 20.)))
Can you confirm that 10 / 20 are pulsing to ground when you're turning it over?
((( Yes I can confirm 10/20 are pulsing.)))
I am usually pretty good at auto electrical, but this one has got me stumped!!
|
dcg9381
Rock Warrior
Reged: 10/05/00
Posts: 669
Loc: Austin,TX
|
|
You have 12v at the injectors.
You have continuity through the injector circuit to the ECU.
The ECU pulses to ground.
Here's the circuit. If W and WR are being pulsed to ground, you're firing the injectors.
--------------------
22REturbo.net
1988 4Runner
22RTE core, turbocharged, megasquirted...
|
Previous
Index
Next
Threaded
Edit
Reply
Quote
