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truck dies while driving, then won't start
I was driving down a country road and I decided to punch it a little, so I did and the second I did I got a huge jerk and the truck was dead so I got pulled over and it would not start, so after 20 minutes of letting it sit and then crankkng, I finally got it to fire up and everything was just normal, so I got it home and started looking around and couldn't find anything wrong so I took it on a test drive and It did it again and this time, no start. I had to be towed home and over and over two hours later no start. Everything that I am reading is pointing to a bad tps, which has been replaced before (I know that the new ones are prone to going bad quickly) any input/ suggestions before I start throwing new parts at it? I always thought that a bad tps wont keep the truck from starting, but would only cause it to run rough Also, I did check for the fuel pump priming and there is fuel pressure
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Well, start by reading codes.
Typically cam/crank sensors, coils, or PCM would be where I'd look. |
It hasn't thrown any codes, I think I have it narrowed down to either the tps or the crank sensor. I did get the truck to start fine once it cooled off but then same thing after about five minutes of running
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Find out what's missing when it won't start. TPS rarely causes a no-start condition, and I haven't ever seen one cause the engine to die while driving.
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I think I have ruled out a tps, I checked function of that with a scan tool this morning, I am thinking a crank sensor now. Would a crank sensor cause no spark? What is a good way to check for no spark without getting lit up by the coil? I'm going to put a crank sensor on it tonight, needs to be done anyway because it has never been replaced before, thanks for the replies guys
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Get one from the dealer, yes, they are more expensive, but, they WORK.
I just use a spare spark plug.... hook it up to a random, easy to get to plug wire, ground it out somewhere, and have a bud crank the motor..... see if anything happens. Do NOT hold it in place with your fingers, you can use a screwdriver, or something similar with an insulated handle..... and you can probably avoid doing the 45,000 volt dance. :D |
I am thinking a crank sensor now. Would a crank sensor cause no spark? What is a good way to check for no spark without getting lit up by the coil? |
Do you guys think that a cam sensor would do this? I would be willing to bet it's one of the two
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I think the pcm will still fire the coil, if it doesn't get a cam sensor signal, it just won't know which injector to fire..... therefore, it probably won't fire any of them. Service manual isn't real clear on that.....
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No spark, replacing the cps right now
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