2004 XC70 no start - faulty fuel pump and/or electrical connections? Topic is solved

[enotslim]

Please list locations you have looked for PEM...

Have not been able to locate the PEM on top of gas tank next to fuel filter, in spare tire well or behind the anterior portion of the right rear wheel well liner. See photos. I checked top of the tank looking from several directions, using endoscope, etc.

[jonesg]

ok,Wait for it to fail.
the pump primes when key is turned from 0 to pos II, not from II to III.
You can here it hum, the pump doesn't click, it hums for about 2 to 3 seconds to build pressure.
Once primed and ready to start test the fuel pressure at the rail.
No fuel at rail?.... pump failed.
Swap the pump.

[cn90]

For gas tank, search the web but you need a flash light to look for PEM. It is easy to miss it.

Please post a photo of gas tank closeup...

[jonesg]

For gas tank, search the web but you need a flash light to look for PEM. It is easy to miss it.

Please post a photo of gas tank closeup...

04 was a split yr, some have some don't.

[erikv11]

For gas tank, search the web but you need a flash light to look for PEM. It is easy to miss it.

Please post a photo of gas tank closeup...

Read the post - OP looked above and around the tank with an endoscope, and pretty clearly knows where to look. It seems there’s no PEM on this one.

[abscate]

I think it is a metal vs plastic parts split for the PEM on the early P2s

[cn90]

...Read the post - OP looked above and around the tank with an endoscope, and pretty clearly knows where to look. It seems there’s no PEM on this one...

So,

You enjoy being a cop in this forum?

[erikv11]

You're welcome!

[enotslim]

OP Update: Car continues to start without fail. Changed fuel filter 2 weeks ago. An initial hesitation when starting persisted for several days, long after the fuel line should have been fully primed. I thought this was odd but it always started. Starting is now back to normal. However, I soon noticed a fuel smell in interior. Discovered the top of the fuel pump is leaking. I am pursuing replacement by a dealer under the recall for this failure (NHTSA PE09-039, see also viewtopic.php?t=25517&start=10) but without much hope for success dono's despite experience recounted at the link. I will install a new fuel pump myself if the dealer won’t do it under recall.

My question here is: could this leak be related to the failure to start that began this thread? Or are they just coincidental? The leak is recent so I don’t think it’s a direct cause. Could failed starts and the leak be related to some underlying issue?

The pump will be replaced soon regardless.

[abscate]

Possible but I doubt it. You need to lose all the fuel pressure for a no-start and that would mean a gusher of gas