I need a little help troubleshooting a L86 starting problem. Any advice would be greatly appreciated!! The issue I thought might be the wiring of a Flaming River ignition but while cranking the motor if I spray starter fluid into the throttle body the engine starts and stays running, it just won't start on its own. I'm new to HPtuners so please don't beat me up too badI have attached the program. Thoughts?
Last time I saw this it was the cam signal due to the short pigtail on the front timing cover losing connection.
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
Wow, thanks for the quick suggestion! I will check it out first thing in the morning...Originally Posted by GHuggins
A log might be helpful. Even if it doesn't run.I need a little help troubleshooting a L86 starting problem. Any advice would be greatly appreciated!! The issue I thought might be the wiring of a Flaming River ignition but while cranking the motor if I spray starter fluid into the throttle body the engine starts and stays running, it just won't start on its own. I'm new to HPtuners so please don't beat me up too bad
Tuner at PCMofnc.com
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Thank you for the reply. Here is the log from start to running.
You're not logging cam counts, but I can tell you straight up every single time I've seen this on a DI engine it was cam related. Even had one harness company pin it wrong and caused a ground leg in the ecm to fry. Just one of many reasons I only recommend swaptime for harnesses now. Re pinned that one and a new ecu and everything was good on that one. Then like I said before the short harness getting corrosion or coolant into it. That's actually REALLY common on the vette engine pulls. Usually an oscilloscope is the easiest to use if you have one. Otherwise just go by schematics and counts. That of course if it's indeed missing the cam. You'll want to log supply pressure and rail pressure too along with inj pulse widths.
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
~Greg Huggins~
Remote Tuning Available at gh[email protected]
Mobile Tuning Available for North Georgia and WNC
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