hello fellow volvo fans ....i am having troble with my 85 740 ...that has been owned by my mother since new...

car had been sitting for some time after stalling on the highway last year

after stalling it would not start up .. i had it towed home and i tried to start it up 2 days later ... it started up fine but ran a little rough ... it then sat for 6 months ... when i recently tried to start it up (last week) it would not turn over ..i then checked the plugs ..they where black (somewhat fouled i guess) i have replaced them ..after replacing the plugs and charging the battery she started up no problem .....while taking a test drive that same day she stalled on me again ...and would not restart

after sitting for aprox 10-15 mins she turned over quick ..then 1-2 minutes into driving she stalled again ...again car would not start ...i let her sit for another 10 mins and she started no problem... this then happened the same way 2 more times untill i finally got her home... where i let her idle in my driveway
5-10 mins later she finally stalled while idling.....

please help i dont know where to start????

Jack

Did you pull the plugs to see if they were fouled again. If so, I would suspect that fuel pressure regulator. You can also confirm this by removing the vacuum hose connected to it. If there is gas in this vacuum hose the FPR must be replaced. FPR => 1 1/2 in diameter cylinder on the front of the fuel rail with vacuum hose connected to intake manifold.

Oh and by the way if you have the old gas in the tank it probably is not good. If it is just a small amount add premium to dilute the old stuff and don't run it hard till all the old gas has been burned. If it is full, better find some way to drain it and start anew.

Dan

Look at the tach when cranking-is it "jumping"? That should indicate you have spark although you can take a spare plug and attach it to a plug wire and look for a spark while grounding it.
You can also listen or have someone else listen for main pump operation.The in tank pump doesn't cause too much trouble if you're over 1/2 tank.
I would suspect that with fouled plugs you are getting fuel.
Try disconnecting the AMM (air mass meter) Do not reconnect it while running if it starts!
Other suspects: power stage-hall sensor in the distributor-also look for oil inside the dist. cap- fuel pump relay??
Make a trip to recycler and pick up as many engine electical components as you can afford. (should be pretty cheap given the age of these vehicles)
I always test them when everything is working good so I know I have reliable spares.
Now you can throw parts at it when you stuck in the wilderness 200 miles from a tow! (like I was when my radio supression relay took a dive!!!)
Also take a look around the engine bay; cracked or split hoses, check all the grounds and connectors.
Sorry,I'm not a pro but these tips worked for me, don't forget to visit the FAQ's,there is a wealth of info there.
Good luck!

2 things come to mind. Bad fuel pump relay behind the ashtray. Or hall sensor wiring at the distributor shorting out. The FAQs cover both of these to trouble shoot.

In case you're having a hard time finding the FAQ (there's a link to it on the main www.brickboard.com page, but it took me awhile to find it), here's a quick link to the chapter you're looking for:

http://www.brickboard.com/FAQ/700-900/HotStartProblemQuickReferenceGuide.htm

God bless,
Fitz Fitzgerald.
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'87 Blue 245, NA 236K