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MORE STARTING WOES
I'm having a similar problem now to another post. Crank, but no start on cold morning. I came out to start it on the first cold morning and it cranked, but wouldn't start. My first thought was fuel pump because I had a similar problem on my e46 where the pump died. However, I checked and was getting sub 11V at the fuse #47 and the same sub 11V at the pump itself. I hot wired the pump from the jumper terminals in the engine compartment which showed 12V and the pump started working. I then switched on the ignition and it started right up. I let it run for a few minuted to warm up and then hooked the wiring harness back up to the pump and it started on it's own. I drove it for over 500 miles that day with no issues. Then, the very next morning the exact same thing happened. I hot wired it again and got it running again. After warming up it starts every time.
Questions: should I have 12v at the fuse and at the pump?
could the sub 11v be a problem with the fuel pump relay?
could the sub 11v be keeping the pump from kicking on, on a cold morning or is it more likely that if it needs that full 12V that the pump is no good
could a pump that is going bad keep the car running for 1000 mile drive that I just did over 2 days?
as I understand it, the power goes through the relay to the fuse then to the pump. is that correct?
this no starting thing is getting old, thanks! ps the sub 11v was about 10.75ish volts
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11-30-2015, 02:57 PM
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