Quote History Quoted:
I'm a dealer tech more central Va.
The V10 is a pretty simple truck.
Do you have fuel pressure? If you spray some gum cutter in the intake with it start for a second or two?
View Quote View All Quotes
View All Quotes
Quote History Quoted:
I'm a dealer tech more central Va.
The V10 is a pretty simple truck.
Do you have fuel pressure? If you spray some gum cutter in the intake with it start for a second or two?
I am assumed from the beginning it was a fuel pressure (bad assumption). Replaced the fuel pump and the fuel pump regulator to no avail. It appears to have good fuel pressure, because once you start it, it runs very well, idles well, no issues with anything, full power, etc.
Crank signal? that's what tells the pcm to fire the coils and injectors. Had 3 mechanics look at it. The first one thinks it's the crank pos sensor. The second one it's the camshaft pos sensor. The third one thinks it's bad gas. It has been sitting for 2 years, driven every few months. I pumped out most of the gas out, and put fresh gas in it. He said it does not smell right and that bad gas mixed with good gas and still no good. And I had the engine started about 3 months ago but never since then. It just cranks endlessly.
I don't know how to check crank signal. Other than via the Forscan software. Will take a shot at it tomorrow.
here is the thing. When I do get it started, it starts easily a few hours after that initial start. But if it seats overnight, it's back to square one. I don't know what that means. Losing fuel pressure? But the pump is new. there is no fuel filter. It's inside the fuel pump. The entire fuel line has been looked at. Probably good to measure the fuel pressure anyway.
The reason I don't think it's bad gas is because it did that exact same thing when I got a full tank of fresh gas. It still would not start the next day.
Here is another clue: It starts easier if I pump the gas pedal. Which makes no sense as it's a 2012 with no carb in it. And has no IAC valve either. I thought it was the engine coolant temperature sensor but then realized 2012 does not have an ECT sensor. Nor IAC.
Is it a sensor? A ground issue? A vacuum leak? It could be any of the 100 and 1 things.
No, it does not start with ether sprayed directly into the throttle body. One of the above repair people thinks it's getting no spark and points to crank or cam sensors. I think he is just guessing.
Is there power at 1 side of the coil and 1 side of the injector with the key on?
Does the check engine light even light up when key is in run position? PCM awake?
No CEL when key is on, yeah PCM engages. Or so I think. PCMs rarely go bad. Not sure about the coils/injectors. Not sure how to pull the voltage. Tach moves 100 rpms when I try to start it. One mechanic said it has no spark but I don't know how he got to that conclusion.
I think my best angle of attack is to try to replace the crank pos sensor, then camshaft pos sensor and then pump out the gas. Or maybe there is something else I am missing. I need someone to take ownership of the problem and just fix it.
I think I've read every article about V10's crank-no-start issue from the beginning of the Internet.
I just got Forscan software and the adapter and will try to look at the live data to see what's malfunctioning hopefully that will shed some light on it.