Car randomly stalls

FRUGAL ART

MEMBER
2004 VOLVO XC70
2.5L
5 CYL
4WD
AUTOMATIC
200,000 MILES

Car randomly stalls. Many users on the internet diagnosed the problem as a bad PEM (fuel pump electronic module). This is a common problem for Volvo vehicles of this era.
There was a recall to relocate the PEM to the spare tire area.
I bought a new PEM and went to replace it, but I can't find the PEM:
I checked out the regular PEM locations but it's not there:
1. Passenger side top edge of gas tank.
2. Spare tire area.
3. Under the rear seat.
4. Rear passenger wheel well.
5. Beside fuel filter.

Where else would the PEM be located?
The only other place I can think of is on top of the gas tank hidden from view.
Very frustrating!
Any help would be much appreciated!

8 Replies

FRUGAL ART

MEMBER
4 POSTS

The XC70 is in Canada. Not sure if Canadian model is different.
Also, the gas tank is plastic not metal.
There is very little space around the tank, and I cannot see a PEM anywhere at the edges of the tank. Can't get a hand up the edges of the tank to see if the PEM is located at the top of the tank.
Will I have to drop the tank?

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Sunday, March 6th, 2022 AT 3:42 PM

JACOBANDNICKOLAS

MECHANIC
109,867 POSTS

Hi,

It's on the tank (top), but you don't need to remove the tank.

If you look below, I have attached the directions. Some of these were actually near the spare tire, but others were on the tank.

Let me know if this helps or if you have questions.

Take care,

Joe

See pics below.

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Monday, March 7th, 2022 AT 1:46 PM

SQM

MECHANIC
6,383 POSTS

Hello,

Keep in mind that the fuel pump module is only equipped with vehicles with demand control fuel pump (according to Volvo).

When the vehicle stalls, are you able to start it back up easily or does it take time before starting again?

I have attached the fuel pump module diagrams below. Take a look at that to see if you might have overlooked anything.

Let me know of any questions.
Thank you.

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Monday, March 7th, 2022 AT 1:57 PM

FRUGAL ART

MEMBER
4 POSTS

Thanks for all the info, but I checked all these locations thoroughly before and again after your post - no PEM. Strange - the PEM is fairly big, where could they have put it?
When the vehicle stalls, I am able to start it back up easily most of the time, but lately it sometimes takes a bit of time before starting again.

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Monday, March 7th, 2022 AT 4:49 PM

JACOBANDNICKOLAS

MECHANIC
109,867 POSTS

Hi,

Are you sure the vehicle has a demand control fuel pump? If it doesn't, it won't have an electric controlled fuel pump module.

If you look at the pic below, that is the only other place the manual indicates as being located.

Let me know.

Joe

See pic below.

Image (Click to make bigger)