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No Start Continuation
Previous thread: http://986forum.com/forums/general-discussions/43943-wont-start-dropping-oil-level.html
We determined the fuel pump was faulty as the plug itself had power to the pump, but when power was applied to the pump nothing happened. After having Brumos overnight a pump for me (ended up being cheaper than Pelican), I installed it on Saturday evening. Success! Started up and drove wonderfully. Did a few startup cycles with no issues. This afternoon I went to go buy groceries and... it just cranked. :mad: I only drove 13 miles between the new pump until it was parked in my garage and it's doing the same thing again. Checked the fuel rail, no pressure. Fuses are good. Bypassed the fuel pump relay, nothing. Swapped the ignition switch, no improvement. However, the DME relay and fuel injector relay (#1 and 2 on the rear relay panel) get warm/hot when cranking. Swapped those relays to no change either. I'm stuck, guys. What are the odds that there is a short somewhere and it fried the new pump (I hope not! :eek: )? Out of ideas on what else to really look into as the same issue (cranks but doesn't fire) came back so soon. Update: Replaced sending unit (w/ internal fuel filter) and fuel pump with used examples, drained the gas tank completely, and refilled with fresh 93 octane. Problem solved. Old fuel in the tank smelled old, not as pungent as fresh gas does - likely a contributor to the failure. Related threads: http://986forum.com/forums/general-discussions/43943-wont-start-dropping-oil-level.html http://986forum.com/forums/general-discussions/44258-still-doesnt-run-help.html |
Could've been a faulty fuel pump. The only thing that could've fried the pump motor would've been a high surge, and that is very, very unlikely. The system doesn't produce enough power to fry it. With a dc system, the pump is only going to draw as much power(amps) as it needs and the voltage will not exceed 15v.
I would check for power at the pump and go from there. My guess is that you got a bad pump...hopefully under warranty. |
Failed fuel pumps are possible but relatively rare. Put 12VDC directly to the new pump to see if it runs. Now put 12VDC to the old pump and see if it runs. If they run, it's not a fuel pump problem and we are still missing something.
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perhaps not getting fuel - something jamming up the pump? the fuel lines in the tank get brittle and break with age. perhaps you are drawing air? perhaps bits of plastic up into the pump?
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Air is possible. Going to have it towed back to my dad's house again so he can work on it. |
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