boxster cranks but won't start..help!!
My boxster cranks, but doesn't start. I've change the crankshaft/reference sensor twice and it does the same...The ECM tested good...Please help...What other sensors should I change or what else should I check?
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Wish I could help, are you in the OKC area? I'd give Dumont's a call, 1-405-232-6497, and see what they say.
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Start with the basics. Are you getting fuel, air, spark? What year and mileage?
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crank, but won't start
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Yes, I'm getting fuel, air and spark. She is a 1998 boxster with 113k miles... Last week I was driving down the highway approx 65 mph. I then push down on gas to go faster and all of a sudden it started jerking and popping like I had bad gas or something....I had to pull on the shoulder of the highway because I lost all the power in the car. I tried to start it back, but it would just crank and crank, but not turn over an start......What do you think? |
crank, but won't start
Yes, I'm getting fuel, air and spark. She is a 1998 boxster with 113k miles... Last week I was driving down the highway approx 65 mph. I then push down on gas to go faster and all of a sudden it started jerking and popping like I had bad gas or something....I had to pull on the shoulder of the highway because I lost all the power in the car. I tried to start it back, but it would just crank and crank, but not turn over an start......What do you think?
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I had a 99' which did the same thing, cluncked out on my on I-5 in San Diego, 5 hours from home. It would turned over, but would not start, it was the MAF. $600 later, it was fixed by the dealer. Since then I've fixed my own MAF's under $250, a very easy to DIY. |
crank, but won't start
Okay, I just tried to unplug the mas sensor and start her, but she still did not crank over...I then rented a ODBII scanner and tested it. The codes I got are PO336 crankshaft sensor & PO727 engine speed sensor?
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crank, but won't start
Quote:
Okay, I just tried to unplug the mas sensor and start her, but she still did not crank over...I then rented a ODBII scanner and tested it. The codes I got are PO336 crankshaft sensor & PO727 engine speed sensor |
Sounds like a mechanical timing issue to me.
Unfortunate for you if that is the case. I wouldn't try to keep messing around cranking and turning it if I were you. Get it to a dealer or a crack independent to find out what's really going on and hopefully that I'm wrong. good luck. |
The DME isn't receiving a signal from the crank sensor. Either the sensor has failed, there is a wiring issue or your DME has failed. Also could be possible the flywheel has lost a significant portion of its teeth but that is pretty unlikely.
To test the sensor, disconnect it at the motor and measure across pins 1 &2, it should have 0.8-1.0 kohm resistance at around room temperature (20 C). Across 1 &3 it should be open. If not the sensor is bad. If the sensor is OK you need to test the wiring between it and the DME. -Todd |
Leave it to a "Master" to come with a logical conclusion. My friend's 3.2 DME 911 died a similar death; culprit was the crank sensor.
You learn a lot from these boards; not that I can remember it, but it's always a great resource. |
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