cn90 wrote:Re Fuel Pump RELAY, you have 2 options:

1. New relay from dealer is about $50 or so.

2. Repair the relay using cheap capacitors ($2-3 from Radio Shack).
Search for the DIY by "Ozark Lee".

I did read that very cool stuff, I will be doing the radio shack upgrade on a few relays

low 40's this AM, started right up, so far so good....

I am sorry, I misphrased my sentence. It should read: - If you jump the 15-87 and car runs, fuel relay is bad. - If you jump the 15-87 and car does not run, fuel pump (or wiring to fuel pump) is bad. Sorry for the confusion! Ok thanks, that makes more sence. I will up date as the weather gets colde...

so far so good 2 days with no issues.

Still looking for clarification on the fuel pump thing.

T.

Did you try the Fuel System Trouble-Shooting Guide I mentioned above? When you have hard starting, jump a wire between 15 and 87, if the problem goes away, then your fuel pump is bad. If not, then suspect fuel relay. https://www.matthewsvolvosite.com/forums/viewtopic.php?f=1&t=52252 Ok so I did...

well as I suspected, the ect was not the fix, It was 50* out and it still did the start then die, then try a few more times then it will stay running. Anyone have any more thoughts on this? it still seems like a fuel issue, I have not been able to check fuel pressure after it shuts off yet I'm new t...

the ohms went to 2700 after install cold, not sure why? and that is still along way from 5000-7000 ohms that a previous poster said it should be.

I wont know in till it sits all night, to see if that fixed the problem.

I'm having my doubts that this was the fix.

Ok so heres the update The car is a 98-not a 97, not really sure why I was thinking 97....

So I bought a new ECT from volvo, And right out of the package it ohms 2100 OHMs, I will install it and check it again to see if this changes.

Going out to install it now...


T.

So I seem to be better at working on cars, than navigating around on computers.

I can't find where to buy the correct SWI ECT

If someone could point me in the right direction that would be much appreciated.

T.

so I VOM checked the ECT it was 4800 ohms, so out of spec I guess?

So then I just un-pluged it, and the car started right up, but of coarse then I got PO117, and fan running after shut down.

So what do y'all think?

Any links for the swf ECT?