Electrical issues here as well ... Blah
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Joined: Oct 2016
Posts: 126
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Electrical issues here as well ... need some help.
I have a ls2 and took it in to the tuner due to a engine knock at 4 psi boost. Tuner first thought it was methanol pump issue. Then he diagnosed 2 bad injectors . well today it started acting goofy. Tuner said electrical issue caused injectors to arc. And dead battery now with some gauges acting crazy.So, my question is what are some of the top things to look at? Battery? Fuse box needs a cleaning? Coil pack?
I just would like to find the issue before a diagnositc eats up $1000.
Anyone have a vette that a bad battery or ground cause an injector to arc?
I just would like to find the issue before a diagnositc eats up $1000.
Anyone have a vette that a bad battery or ground cause an injector to arc?
Last edited by newbC6; Sep 21, 2018 at 06:04 PM. Reason: more info
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What injectors?
As for C6, injectors should have about 11-14 resistance and should be the same for all of them. if you are using injector's with less than this for resistance, it's part of the problem.
From here, check the voltage at each injector plug, and should have about 14. something volts.
Next, double check the injector balance via a tech II to make sure they are balanced correctly.
Also, check duty rate of the injectors, and if it maxed out, another problem as well. Hence at most, you only want the duty rate of the injector at 80% at full RPMS, since above this, the injector pulse rate is pretty much wide open to keep the injector at a full constant spray instead.
As for the injectors, they are getting there power from the power train Ignition relay 1, through fuse 12 and 16, and the negative side is controlled by the ECM to pulse them. Why I bring up the ECM, is if you have enough RF noise in the system from after market spark plugs, or spark plug wires causing such to make it way back to the ecm, could be causing the problem as well. A quick way to check to see if you have RF noise at the ecm, is to let the car idle, and take a reading off just the alternattor (back terminal under the rubber boot, and use the alternator body as the ground for the meter) and if you have less than 14.7 volts, ECM is seeing too much RF noise to glitch it, since it controls the output voltage on the alternator as well.
Also double check the spark plug wires path, and make sure it not near the alternator cable, not near any of the fuel ejector wires as well.
As for C6, injectors should have about 11-14 resistance and should be the same for all of them. if you are using injector's with less than this for resistance, it's part of the problem.
From here, check the voltage at each injector plug, and should have about 14. something volts.
Next, double check the injector balance via a tech II to make sure they are balanced correctly.
Also, check duty rate of the injectors, and if it maxed out, another problem as well. Hence at most, you only want the duty rate of the injector at 80% at full RPMS, since above this, the injector pulse rate is pretty much wide open to keep the injector at a full constant spray instead.
As for the injectors, they are getting there power from the power train Ignition relay 1, through fuse 12 and 16, and the negative side is controlled by the ECM to pulse them. Why I bring up the ECM, is if you have enough RF noise in the system from after market spark plugs, or spark plug wires causing such to make it way back to the ecm, could be causing the problem as well. A quick way to check to see if you have RF noise at the ecm, is to let the car idle, and take a reading off just the alternattor (back terminal under the rubber boot, and use the alternator body as the ground for the meter) and if you have less than 14.7 volts, ECM is seeing too much RF noise to glitch it, since it controls the output voltage on the alternator as well.
Also double check the spark plug wires path, and make sure it not near the alternator cable, not near any of the fuel ejector wires as well.
Last edited by Dano523; Sep 21, 2018 at 08:37 PM.
Thread Starter
Instructor
Joined: Oct 2016
Posts: 126
Likes: 10
What injectors?
As for C6, injectors should have about 11-14 resistance and should be the same for all of them. if you are using injector's with less than this for resistance, it's part of the problem.
From here, check the voltage at each injector plug, and should have about 14. something volts.
Next, double check the injector balance via a tech II to make sure they are balanced correctly.
Also, check duty rate of the injectors, and if it maxed out, another problem as well. Hence at most, you only want the duty rate of the injector at 80% at full RPMS, since above this, the injector pulse rate is pretty much wide open to keep the injector at a full constant spray instead.
As for the injectors, they are getting there power from the power train Ignition relay 1, through fuse 12 and 16, and the negative side is controlled by the ECM to pulse them. Why I bring up the ECM, is if you have enough RF noise in the system from after market spark plugs, or spark plug wires causing such to make it way back to the ecm, could be causing the problem as well. A quick way to check to see if you have RF noise at the ecm, is to let the car idle, and take a reading off just the alternattor (back terminal under the rubber boot, and use the alternator body as the ground for the meter) and if you have less than 14.7 volts, ECM is seeing too much RF noise to glitch it, since it controls the output voltage on the alternator as well.
Also double check the spark plug wires path, and make sure it not near the alternator cable, not near any of the fuel ejector wires as well.
As for C6, injectors should have about 11-14 resistance and should be the same for all of them. if you are using injector's with less than this for resistance, it's part of the problem.
From here, check the voltage at each injector plug, and should have about 14. something volts.
Next, double check the injector balance via a tech II to make sure they are balanced correctly.
Also, check duty rate of the injectors, and if it maxed out, another problem as well. Hence at most, you only want the duty rate of the injector at 80% at full RPMS, since above this, the injector pulse rate is pretty much wide open to keep the injector at a full constant spray instead.
As for the injectors, they are getting there power from the power train Ignition relay 1, through fuse 12 and 16, and the negative side is controlled by the ECM to pulse them. Why I bring up the ECM, is if you have enough RF noise in the system from after market spark plugs, or spark plug wires causing such to make it way back to the ecm, could be causing the problem as well. A quick way to check to see if you have RF noise at the ecm, is to let the car idle, and take a reading off just the alternattor (back terminal under the rubber boot, and use the alternator body as the ground for the meter) and if you have less than 14.7 volts, ECM is seeing too much RF noise to glitch it, since it controls the output voltage on the alternator as well.
Also double check the spark plug wires path, and make sure it not near the alternator cable, not near any of the fuel ejector wires as well.
The injectors were from AA corvette 60 lb Bosch I believe.
I will definitely get the tuner to check on all the suggestions or go pick it up and do it myself The head scratcher for me was how an injector arcs and also a dead battery .
