New fuel pump - installed....ok, now what!

goldfishhh · Post by **goldfishhh** » 06 Apr 2011, 17:44

New pump in. No start. Cranked on it for 20secs then stopped. Tech at the dealer suggested unplugging the battery and let the car sit for an hr or so then replug and restart. So far - no go.

Just replaced the spark plugs. No go.

No engine codes either (yet).

Im stuck. Any ideas?

goldfishhh · Post by **goldfishhh** » 10 Apr 2011, 06:03

In a bit deeper. Hooked up a fuel pressure gauge to the rail and with the key in 2nd position - no pressure. Cranking - no pressure. With a helper, put key in 2nd position and pressed my ear against the floor where the pump is - no 'whirring' sounds. Hmm.

Used a multimeter to test each of the fuses under the hood - all good. Test resistance on the relays - all good.

Post by **kcodyjr** » 10 Apr 2011, 08:43

Give the relay a good whack, maybe try swapping in another if you have one handy.

If it isn't the pump, relay, or fuse, all that remains is ECU and wiring.

goldfishhh · Post by **goldfishhh** » 10 Apr 2011, 18:23

ECU for the fuel pump. The one behind the passenger wheel well..... shazam!

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Post by **kcodyjr** » 10 Apr 2011, 18:51

Quoting an exceptionally memorable movie,

"Sister Mary Francis! What the HELL happened HERE??!!"

TexasCoder · Post by **TexasCoder** » 10 Apr 2011, 19:13

goldfishhh wrote:ECU for the fuel pump. The one behind the passenger wheel well..... shazam!

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OUCH!!! How much do one of those run?

goldfishhh · Post by **goldfishhh** » 12 Apr 2011, 04:38

$365 from the dealer - $122 from a few dismantlers.

What kills me is there can't be more than $1 worth of electronics.

Post by **jimmy57** » 12 Apr 2011, 09:17

"What kills me is there can't be more than $1 worth of electronics"
Be sure you keep that in mind when buying those Apple and other products we all so dearly love.
You need to re-locate the pump module per a service bulletin. There is an adapter harness involved.
I'd be sure the new one is VERY clean or you could be buying another one on the way down the tubes.

goldfishhh · Post by **goldfishhh** » 12 Apr 2011, 17:08

*giggle* Yea, I aint relocating the pump control module - that is the next guys problem, not mine. As soon as this thing fixed the car is going to be traded in. Stupid economy has killed our income and the $760/mo (36mo left) isn't sustainable.

TexasCoder · Post by **TexasCoder** » 12 Apr 2011, 21:39

jimmy57 wrote:You need to re-locate the pump module per a service bulletin. There is an adapter harness involved.
I'd be sure the new one is VERY clean or you could be buying another one on the way down the tubes.

How does it get that hot in the first place? Is it strapped to the back of the catalytic converter? Is this something I should think about doing on my 2004 T5 RWD XC90?

New fuel pump - installed....ok, now what!

Re: New fuel pump - installed....ok, now what!