LT5 Misfiring at All Speeds - ZR-1 Net Registry Forums

Big D · 07-17-2015

Hi Paul, I also talked to Jon this morning and he said that you had called him. Thank you. He was helpful and gave me the same information. I find it hard to believe that the injector would be bad but i have to check it. So, the plenum is off, again, gettting pretty good at this. The wire bundle is tight and would not allow mis-connection but i checked it anyway, per Jons instructions, and the connectors are to the correct injectors. Jon said to use a 9 volt battery to check the injector and it fired just fine, just like the others that I checked next to the questionable one.
The wire diagram in the manual is not all that helpful, i'll need greater detail now to figure out how to wring out the wiring. Since the other primary injectors appear to be working correctly i'll need to shoot the wire from the injector to the direct ignition housing. The manual just shows all injector wires going to what appears to be one splice or terminal.
and then on to the ignition and the Direct Ignition Housing. It would be helpful if i knew what fired the primary injectors, the manual diagrams don't show that or explain it.

Ken, don't be alarmed, I'm sure it is a vehicle problem and not the injector. Jon is very helpful and understanding. He even offered up a replacement injector before I even verified this one was bad, but i declined the offer. So after my checks above, i feel confident the injector isn't bad and that it is a vehicle problem. The top end run is great, better then it ever was and i contribute that to the new inlectors. But, if i can't find any wiring problems i will have to do the injector swap and see if the problem follows the injector.

07-17-2015	#11
Big D Join Date: Jun 2014 Location: Washington State Posts: 17	Re: LT5 miss at all speeds Hi Paul, I also talked to Jon this morning and he said that you had called him. Thank you. He was helpful and gave me the same information. I find it hard to believe that the injector would be bad but i have to check it. So, the plenum is off, again, gettting pretty good at this. The wire bundle is tight and would not allow mis-connection but i checked it anyway, per Jons instructions, and the connectors are to the correct injectors. Jon said to use a 9 volt battery to check the injector and it fired just fine, just like the others that I checked next to the questionable one. The wire diagram in the manual is not all that helpful, i'll need greater detail now to figure out how to wring out the wiring. Since the other primary injectors appear to be working correctly i'll need to shoot the wire from the injector to the direct ignition housing. The manual just shows all injector wires going to what appears to be one splice or terminal. and then on to the ignition and the Direct Ignition Housing. It would be helpful if i knew what fired the primary injectors, the manual diagrams don't show that or explain it. Ken, don't be alarmed, I'm sure it is a vehicle problem and not the injector. Jon is very helpful and understanding. He even offered up a replacement injector before I even verified this one was bad, but i declined the offer. So after my checks above, i feel confident the injector isn't bad and that it is a vehicle problem. The top end run is great, better then it ever was and i contribute that to the new inlectors. But, if i can't find any wiring problems i will have to do the injector swap and see if the problem follows the injector.