Injector problem but no codes
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8th Gear
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Injector problem but no codes
I have pro line auto enginunity but for some reason I can't figure it out any suggestions will be greatly appreciated I've tried cutting ymthe injectors off one by one nothing different done the buzz test all fine their film 48 v ipr fine
Fleet Owner
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From: Spanaway
Benny is correct.
AE won't do an uncompensated power balance.
Then on top of that an injector must be nearly dead for it to report any problems.
Get your hands on Forscan laptop version with the wired OBD2 connection.
Ir you can try and find one of the good VCM2 clones.
AE won't do an uncompensated power balance.
Then on top of that an injector must be nearly dead for it to report any problems.
Get your hands on Forscan laptop version with the wired OBD2 connection.
Ir you can try and find one of the good VCM2 clones.
Fleet Owner
Joined: Nov 2003
Posts: 27,792
Likes: 3,542
Unfortunately even the wired (USB) version of ForScan (full version) won't do an uncompensated Power Balance test.
Hate to say this, but there's only so much you can check on injector contribution problems without dealer level diagnostic equipment. An injector could easily cause the contribution issue(s), but so could a lot of other things. When you have only contribution codes, or worse yet - only rough running conditions, generally you have only a couple of choices: 1) Take it in for uncompensated injector Power Balance testing, or 2) firing parts at it, which could possibly cost more than having it diagnosed correctly.
As an FYI - the dealership should run the Power Balance on a cold engine.
Typically, the only parameters that you're capable of viewing that MIGHT help are FICM volts (MPower, LPower, and VPower), ICP pressure, ICP voltage and IPR % duty cycle. Try to watch these parameters with the problem occurring. If you see ICP sensor voltage acting erratically, or IPR % duty cycle maxing out at wot, then you probably have an issue in the High Pressure Oil System.
Another thing to check is fuel pressure, but that requires an "add-on" sensor AND gauge. ALWAYS monitor with the problem occurring if possible.
Hate to say this, but there's only so much you can check on injector contribution problems without dealer level diagnostic equipment. An injector could easily cause the contribution issue(s), but so could a lot of other things. When you have only contribution codes, or worse yet - only rough running conditions, generally you have only a couple of choices: 1) Take it in for uncompensated injector Power Balance testing, or 2) firing parts at it, which could possibly cost more than having it diagnosed correctly.
As an FYI - the dealership should run the Power Balance on a cold engine.
Typically, the only parameters that you're capable of viewing that MIGHT help are FICM volts (MPower, LPower, and VPower), ICP pressure, ICP voltage and IPR % duty cycle. Try to watch these parameters with the problem occurring. If you see ICP sensor voltage acting erratically, or IPR % duty cycle maxing out at wot, then you probably have an issue in the High Pressure Oil System.
Another thing to check is fuel pressure, but that requires an "add-on" sensor AND gauge. ALWAYS monitor with the problem occurring if possible.
Fleet Owner
Joined: Nov 2003
Posts: 27,792
Likes: 3,542
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