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Tuner
Gen V swap 17 Tahoe 8 speed auto
I can?t get the car to run. I?ve tried VATS, and clutch and starter switches. I?m not getting any injectors pulse while cranking. If I put starter fluid it will run. It tried to hit a cylinder here and there. But will not run. Any ideas?
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Tuner
Is your fuel pump working? Or are you getting fuel to the rail?
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Tuner
Fuel pump working, 72 psi
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Tuner
I know at first start I had fuel cut status until high pressure pump was up to pressure and it took about 10 seconds of cranking. Try logging some parameters while cranking:
Fuel rail pressure
Desired fuel pressure
Fuel pressure state
Fuel cut type
Immidiate engine torque source.
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Also, check the codes. Possibly need to turn off a few more.
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Tuner
Ok I get a weird reading of like 95000. Is there an actual high pressure fuel rail sensor
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Yes. It is on the back of the driver's side fuel rail.
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Tuner
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Tuner
100% Required or car will not run.
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It changes pulse-width depending on pressure. It absolutely has to know how much pressure the injectors are receiving.
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Tuner
I wonder why it?s maxed at 95000, it?s connected
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Tuner
I set all LP settings to a default 72. But it reads zero in the log. I wonder if that?s my issue?
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Advanced Tuner
Did you removed the harness? under intake manifold? there are 2 connectors that can be mixed when reinstalling those contains wiring for the injectors, fuel rail pressure sensor , etc, i have seen that issue at least 2 times, did you have any codes?, crank it, read codes, crank it, read codes again, read codes again, to see if it throw you something.
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Advanced Tuner
Also log; Cam counts, to check if you have cam signal
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Tuner
Awesome guys... thanks... we are trying it step by step
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Tuner
That was it. The damn harness was backwards. The only thing we are fighting is the pedal doesn?t work. But started right up and idles perfect
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That is great!
It would really help if you can plug in, open up VCM Scanner and check what codes you have.
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Tuner
I?m away on vacation, I?ll get home and reflash with stock cal vats off and see what all codes come up. I had turned several off for attempting to get it to run
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Tuner in Training
anything to hear back on this having same problem cranks with no start
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Tuner
It was the injector harness under intake had the fuel pressure sensor hooked up to an injector