850's new FP or rebuild? FAE ECT?

Post by **JimBee** » 01 Dec 2016, 18:31

Still struggling to get the 93 850 started for those who might have read my post.
Today was more hopeful, with a few encouraging pops before the battery died; it was low anyway.

I swapped in a fuel pump I've had laying around for a few years. I'm getting power to pump which hums when the key is turned on.
About the question: I think I remember a discussion about rebuilding a fuel pump with a kit but don't recall if anybody had done it successfully. If you have knowledge of this, please share.

The ECT. After reading cn90's post listing a range of resistance values for the coolant temp sensor, I measured mine. Ambient temp was in high 30's today and of course engine hadn't been running.
The ohm reading I got on my analog meter was around 3900. It should be around 6k according to cn90's table, also verified online.

Is that enough of a difference to prevent a cold start?

Re: brand. The SWF coolant temp sensor is available locally for around $60.00.

The FAE brand can be had for less than $20.00. But is the FAE trustworthy?

Post by **misha** » 03 Dec 2016, 02:58

Everything except Oem Volvo(swf which is Valeo btw),or at least Vernet is a waste of time.
Nothing else will work on these cars.

Post by **kranz** » 03 Dec 2016, 04:33

JimBee wrote: I swapped in a fuel pump I've had laying around for a few years. I'm getting power to pump which hums when the key is turned on.
About the question: I think I remember a discussion about rebuilding a fuel pump with a kit but don't recall if anybody had done it successfully. If you have knowledge of this, please share.

Not a Volvo, but I rebuilt a fuel pump for a different Swedish car. I replaced the failed OEM Walbro electric fuel pump with another Walbro and had no problems with it. It came with a replacement rubber mounting donut. It came with instructions, was not a difficult repair, and was much cheaper than purchase of the whole fuel pump assembly. During the process I learned that gasoline is not a good electrical conductor.

beigg · Post by **beigg** » 03 Dec 2016, 07:12

FAE may be a roll of the dice. If it works out of the box now, it might fail in short time; at a time with less convenience to replace.

kranz wrote:During the process I learned that gasoline is not a good electrical conductor.

Fumes from gasoline makes a great conductor...

Post by **misha** » 03 Dec 2016, 08:06

kranz wrote:... I replaced the failed OEM Walbro electric fuel pump with another Walbro and had no problems with it...

Walbro was NEVER OEM for Volvo.

Post by **kranz** » 03 Dec 2016, 08:15

beigg wrote:Fumes from gasoline makes a great conductor...

Don't know about the conductive properties of gasoline fumes, but they are easily combustible. They would require a spark to get going.

Post by **kranz** » 03 Dec 2016, 08:21

misha wrote:[quote="kranzWalbro was NEVER OEM for Volvo.

Walbro WAS OEM for the other Swedish manufacturer's product that I mentioned I was repairing. From my experience they made a good product, and if they make a replacement for VOLVo pumps, it might make a suitable replacement.

Post by **misha** » 03 Dec 2016, 10:04

Volvo oem fuel pumps are made by Bosch.
Replacements can be from Bosch,Hella,Walbro,Pierburg,Siemens....whole assembly or just an insert.
Walbro is making performance fuel pumps too and have a good reputation as long as it's not a cheap chineese copy.
You don't need to replace the whole assembly....just the insert and oem Bosch is also available from Volvo.