Fuel pump no power

[saabguy]

No power to fuel pump. Replaced fuel pump, main relay replaced, checked every single fuse 24 and 31 have power and are good, jumped the contacts on main 1 to 7 and 5 to 7 and the fuel pump turns on but no start, have plenty of spark and injectors have power. Please help.

 

[5SpeedEJ6]

My first question is how do you know for sure it's your fuel pump? for all you know, it could still be your main relay (which are behind a lot of the 'no start' problems).

 

[Diana Nam]

well the main relay doesn't just turn the fuel pump on or off that only half of it, the other half sends power to other things

 

[saabguy]

My first question is how do you know for sure it's your fuel pump? for all you know, it could still be your main relay (which are behind a lot of the 'no start' problems).

Because I took my multimeter to the leads and there is no power unless I jump 5 to 7 or 1 to 7 on the relay. The relay Is new.

 

[Diana Nam]

Because I took my multimeter to the leads and there is no power unless I jump 5 to 7 or 1 to 7 on the relay. The relay Is new.

If your pump turns on when you jump the pins then it's not the fuel pump if the relay is new then there might be a excessive power draw that keeps blowing the fuel part of the relay

And check the wiring

 

[saabguy]

I have traced all wiring for the fuel pump. It all has perfect voltage and continuity. I know the pump is fine it's new.

How would I find an excessive power draw. Has anyone dealt with this before

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[saabguy]

It's with an electrician now I will let you know what was wrong.

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[Diana Nam]

well what was problem?

 

[saabguy]

I'm military stationed over seas in Sicily Italy and electricians and mechanics take a little longer here lol. I will keep you all posted

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[saabguy]

The result is in... Distributor rotor screw came lose and shorted a connection inside the distributor housing.

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[Diana Nam]

The result is in... Distributor rotor screw came lose and shorted a connection inside the distributor housing.

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sometime it can happen i've seen stranger stuff happen

 

[saabguy]

Wtf though something so simple. I had spark to that's the messed up part. Damn you screws that randomly fall out and touch electrical posts.

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[Diana Nam]

cam angle sensor and stuff are in the distributor for honda all tho obd2 typically had a external crank angle sensor mounted by the crank gear that the timing belt rides on. ecu usually reads tho sensors first upon first start up

 

[saabguy]

Yup and that's why the fuel pump wouldn't turn on.

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[saabguy]

Had to replace the distributor and the PCM and boom she's back up.

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[Diana Nam]

you managed to short the ecu?

 

[saabguy]

No not the ecu the pcm and distributor. The screw fell off and killed it all

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[Diana Nam]

the pcm is the ecu just called differently

 

[saabguy]

When I think ecu I'm thinking the whole ecu the pcm is just a part of it.

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[Diana Nam]

yea sound really odd and confusing. being that both are the same unit because pcm is only just one of many parts of the ecu and its not sold separately normally the whole ecu is sold/ replaced. cause if you really wanted to replace or fix that part on the ecu you'll be sitting there taking off old solder and re soldering it or possible replacing burnt chip or resistors off the board