[slodrivr]

My engine had thirty thousand miles on a rebuild when a timing chain guide disentigrated. The engine was running well. I tore the engine down, used engnbldr's kit, put things back together. This took place during a body swap (both vehicles 85 4runner) and over the course of several months. Now when I try to start it it cranks well and will start, run for a couple seconds then die. I think it is starting off the cold start injector, but the primary injectors are not opening up. I have tested the following, anything else I'm missing? I'm beggining to get frustrated.

Fuel
Cracked the fuel line to cold start injector, fuel leaks.
Pump runs using 4crawler method
Pump runs without jumper when flapper in AFM is moved
Circuit opening relay test good
Swapped in second circuit opening relay that tests good
Fuel cooming from return line while cranking
Solenoid resistor tests good
Swapped in second solenoid resistor that tests good
Resistance between batt - and solenoid resistor 3 ohms
Injector ground attached at manifold/plenum junction 1.5 ohms to batt -
Cold start injector sprays good pattern
Main injectors were sent out for cleaning, flowing etc.
Main injectors do not spray when fuel rail removed, injectors in rail, cranking

Spark
New plugs(NGK gapped .030), cap(NAPA), rotor(NAPA), wires(dealer)
Engine runs for a few seconds so there is some spark
Swapped in second coil and igniter
Resistance between strap around coil and batt - 4.5 ohms
Second distributor tried

Timing
Crank at mark, shiny links on dots, rotor pointing to 1
Again, it runs well for those couple seconds, so I don't think timing is an issue


TPS adjusted per FSM
TPS plug removed bottom two connections jumpered
Second TPS plugged into harness, not attached to TB
Tried second ECU
Intake tubing intact and secured
All new vacuum lines tripple checked for correct routing
Good multiple grounds body to engine
Second ignition switch tried

 

[4CrawlR]

How about the injector to ECU connections, 2 injectors conect to terminal No10 and 2
more to No20. That is what actually grounds the injectors to make them let gas through.

There are a handful of threads on 4x4Wire with the same problem and some fixes, do a search on the Early Trucks forum for "+Fuel +Injector +Wiring"

Some examples:
http://www.4x4wire.com/forums/showf...e=y&olderval=&oldertype=&bodyprev=#Post740084
http://www.4x4wire.com/forums/showf...e=y&olderval=&oldertype=&bodyprev=#Post736733
http://www.4x4wire.com/forums/showf...e=y&olderval=&oldertype=&bodyprev=#Post731261

 

[Lord Orange]

do you get continuity through the injector wires? See if the injector clips have had the wires pushed all the way through.

 

[[email protected]]

Check the electrical connection to the AFM.

 

[jmsdad]

I would bet a 12 pack that your injectors are not firing. First check for continuity on the injector wires. If you have continuity, then your injectors are bad. It's possible that the shop or carrier drop/damage your injectors when you sent them out for cleaning. If you have another set of injectors, put them in and see if it'll start.

 

[comppwizz]

I had the same problem on my 85 it would start run for a sec or 2 and then die if you try to restart it right away it wont start if you let it sit for a min or 3 it will start run for a sec or 2 and die.

it was the main efi/ecu relay at the fuse panel was going bad, check it. you can make a jumper wire and and bypass the relay for a easy check / temp fix.

the relay will check ok for continuity but that does not mean it's ok you have to do a voltage drop test on it then you will see it's really bad

 

[wr250]

on the passenger fender there is a "injector resistor" be sure it is hooked up correctly. 2 leads go to the injectors (w and W) one is a power lead ( B/Y ).do not do what i did and follow the crappy haynes manual ( which is wrong btw). mine would run for a few seconds and die. was running on cold-start injector only, due to me following the incorrect haynes diagram.i looked at my other 22RE to find the problem.

 

[slodrivr]

4Crawlr
I have battery voltage at terminal 10 and 20. I Checked out those links and decided to tear the harness apart anyway. I found the butt splice for the ground wires to be in marginal condition so I replaced it with wire and solder. I also replaced a small section of one of the wires that goes to the igniter. Afterwards, no change.

Lord Orange
The harness tests good from the resistor to the injectors to the computer. Also from the igniter plug across the top of the engine to the computer.

Jmsdad
I'm pretty sure you are correct about the injectors not opening. Every once in a while I get kinda discouraged with the thing so I'll start it on starter fluid and see how long I can keep it running. I'm up to about 20 seconds. Unfortunately that is a rather unsuitable fix for my dd. The injectors were bubble wrapped to and from Cruzin Performance for service. I have heard of some other people not having good results with them. The injectors are all about 2.5 ohms. I'm working on getting another set to try.

Commwizz
I tried two different main relays. I tried using a jumper between as you suggested. If the check engine light is coming on with the check jumper installed doesn't that confirm the relay is ok? I get battery voltage between +B and E1 also between Batt and E1

WR250
How do you hook up the resistor incorrectly? On mine there is a one pron plug and a two pron plug.


Anybody have other ideas? This is starting to get old. On thing I noticed and didn't understand was between the white and blue/yellow wires in the injector connector I was getting 3ohms. Doesn't seem like there should be continuity there with the ignition off.

 

[wr250]

How do you hook up the resistor incorrectly? On mine there is a one pron plug and a two pron plug.

the little connector inside the plug pushes back and doesn't make a good connection.

i am in the process of stripping the harness for a buggy. however its been 90 (low temp 105-115 for the daytime high) for the last month,and not much has been accomplished on that. i ended up getting a FSM for the correct wiring.

 

[slodrivr]

I tried jumpering terminals 10 and 20 to ground(simultaneously, ignition on) and the injectors all clicked. So I think that rules out any problems between the ignition switch, the injector resistor and the wiring to the computer. Any other ideas?

On a related note, the fuel pump jumper has ceased to activate the fuel pump. It will make the check engine light operate like it is supposed to and the fuel pump still turns on when you move the flapper in the MAF. weird huh.