22re Fuel Injector Wiring
#1
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22re Fuel Injector Wiring
I am chasing down the cause of my #2 injector woes. The history. Truck ran fine until 4th of july, i had a bad miss. I pull plugs and #2 cylinder is not firing. Has air, and spark, but injector not firing. I drive truck again the injector is firing (veryfied with listening device) A few weeks later it happens again. I read up on possible causes. Right now I pulled the intake and am cutting into the wiring harness looknig for bad splices since the 4runner is an 86. I find the splice for the blue wires. I cut into tape and shocked to see how good of condition the splcie is. It looked brand new. So as of now my question is.
How far down is the splice for the wire wires? I at first thoguht it was going right to Computer but the whites splice together also. So i have cut the harness down quite a bit but havnt gotten to the splices. I am interested to know how far they are so i can maybe skip a cutting the jacket of some of the harness.
Also another injector question. If an injector got plugged or gummed up, will the injector still "tick" or will it be dead and silent? If I do not find a bad splice here i am going to pull injectors and have them rebuilt.
Thanks for any help!!
How far down is the splice for the wire wires? I at first thoguht it was going right to Computer but the whites splice together also. So i have cut the harness down quite a bit but havnt gotten to the splices. I am interested to know how far they are so i can maybe skip a cutting the jacket of some of the harness.
Also another injector question. If an injector got plugged or gummed up, will the injector still "tick" or will it be dead and silent? If I do not find a bad splice here i am going to pull injectors and have them rebuilt.
Thanks for any help!!
#2
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I'd blame a 24 year old injector before the wiring, if the wiring looks like it's in that good of shape
were it me, I'd move that injector to a different cylinder, and see if the problem follows that injector
if the misfire follows the injector, then it's the injector going bad; if the misfire stays at cyl 2, then it's the wiring
were it me, I'd move that injector to a different cylinder, and see if the problem follows that injector
if the misfire follows the injector, then it's the injector going bad; if the misfire stays at cyl 2, then it's the wiring
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I probably wont get that far. I will probably pull all injectors first and get the rebuild done on them. Pulling the intake and everything twice or more to swap around injectors will just take forever. I still want to inspect the other splice to make sure so i have peace of mine when it comes to the harness. I am happy how it looks so far.
thanks!
thanks!
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Update. I found the other splice. Still didnt look bad but i am gonig to solder them together. I pulled my injectors and found them to be a real mess. #3 injector that wasnt a problem had nasty crud in the filter of the injector. So they will be off tomorrow to witchhunter.
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Sure. Also hopeing this will cure my little issue of hard starting if i let the truck sit for more than 3 days. It will crank and crank and crank but wont fire untill i pump the heck out of the pedal to get it to take. It will be alive again soon
#9
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i had the same problem in my 86 4runner. the wires and the splice looked great, but the inside of the wires were corroded so bad that they weren't carrying current to the injector. i fought with it for ever, i figured it out by using a test light, i tested the wires about every inch until i found the bad spot. good luck!
#13
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The injectors on a 22re batch fire, which means all 4 injectors fire at the same time. Common thought is that 1&3 fire together and 2&4 fire together, but No 10 and No 20 are tied in the harness after they leave the injectors, so if the ECU completes the ground circuit through either No10 or No20 all four injectors fire. The only places you might have a wiring issue is on the voltage feed between the splice and the injector clip, on the injector clip or on the first splice past the injector where it ties to #4 injector and No 20. Quick test is with the engine off, turn the key to the on position and check voltage from No 10 and No 20 to ground at the ECU. There should be Battery voltage on each one.
If that's what you read there is nothing wrong with the wiring. I had a miss on my 5m-ge in my truck one time and it was the connection at the injector.
If that's what you read there is nothing wrong with the wiring. I had a miss on my 5m-ge in my truck one time and it was the connection at the injector.
#14
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i had to remove the plenum again cuz i damaged an o-ring replacing my injectors.im going to get into the harness today,ive put the fuel rail back on but it seems i read somewhere you have to disable the fuel pump if your going to put power on with the plenum off,is this correct? and as far as finding power in the harness,i should be able to use a standard 12 volt light tester on the harness at first to check for power,then work my way up to the injector connector from there...correct? i REALLY dont want to take this apart again. its getting too friggin cold!!!
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The injectors on a 22re batch fire, which means all 4 injectors fire at the same time. Common thought is that 1&3 fire together and 2&4 fire together, but No 10 and No 20 are tied in the harness after they leave the injectors, so if the ECU completes the ground circuit through either No10 or No20 all four injectors fire. The only places you might have a wiring issue is on the voltage feed between the splice and the injector clip, on the injector clip or on the first splice past the injector where it ties to #4 injector and No 20. Quick test is with the engine off, turn the key to the on position and check voltage from No 10 and No 20 to ground at the ECU. There should be Battery voltage on each one.
If that's what you read there is nothing wrong with the wiring. I had a miss on my 5m-ge in my truck one time and it was the connection at the injector.
If that's what you read there is nothing wrong with the wiring. I had a miss on my 5m-ge in my truck one time and it was the connection at the injector.
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I would check to see If you have power at the injector driver on your passenger side fender well. It's a finned metal box with 2 plugs. 1 plug goes to the fuse box next to it. The other has 1 yellow wire and 1 blue wire. These wires fire your injectors. The blue fires 2 injectors the yellow fires the other 2. You should have a pulsating voltage when running. If you have voltage coming out but no voltage at the injector then I would check the harness.
#18
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snow walker said:- I would check to see If you have power at the injector driver on your passenger side fender well. It's a finned metal box with 2 plugs. 1 plug goes to the fuse box next to it. The other has 1 yellow wire and 1 blue wire. These wires fire your injectors.
This is from a Toyota Manual.
"Low resistance injectors which typically range from 2-3 ohms @ 70F are used with an external resistor in a voltage controlled driver circuit. Low resistance injectors are also used without an external resistor in a current controlled driver circuit. High resistance injectors which typically run 13.8 ohms @70 F do not require the use of an external resistor in a voltage controlled driver circuit."
The blue fires 2 injectors the yellow fires the other 2. You should have a pulsating voltage when running. If you have voltage coming out but no voltage at the injector then I would check the harness.
Natetru: If #1, 2 and 4 are firing then the splices where all the wires connect together are ok! (The reds are tied together and the White #10 and #20 wires are tied together. First your problem was with #2 and then you changed the injectors now it is #3. Did you have your injectors reconditioned or are you just using injectors from another motor?
I'm still thinking that you have either got a bad connection at #3 injector (red wire or white/? wire) or the injector is faulty.
Last edited by Hadmatt54; 08-02-2011 at 06:29 AM.
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thank you for the help, i didnt start the post. my problem has been at #3 from the beginning. i dop appreciate you taking the time to pass on this info. faulty injector causing no voltage at ecu terminal No 20?
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Hmm thanks for clearing that up. You learn something new every day. I had no idea that the 22rte engine harness was different than the 22re. My friend is running a 22re engine harness on his rte. The rest of the harness is from a turbo truck. This must mean that all four of his injectors are firing at once. I wonder why Toyota did this.