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Hi Bob,
OK on Montana,
Volvo factory trained 740 techs are mostly retired.
You need a service library.
Check your local library network for auto repair data services.
Tell me if there's a good one for Volvo- some are crap.
None I've seen come remotely close to genuine Volvo.
I like the Haynes manuals. You want #1258. Search used books.
It gives nice details for installing stuff like the distributor.
The earlier Haynes book for the 740 #97040 (1550) is for 1982-1988
and a lot of the items are the same. Send me an email and I'll give you
another link that might find the Volvo wiring manual you want.
Big brother (Google & friends proxy sites) will rent the manual to you for $29.99/year instead of coughing up the free info. This is another reason why monopoly search engines suck.
YES! Change out ALL of your old vacuum lines, elbows etc.
Hopefully you have service records about the T-belt, water pump etc.
Yes the RSR is near the P/S reservoir and can disable the injectors.
It is controlled by the main fuel relay. Change out both of them since they
are old and tired, and your car will croak when they act up.
Search ebay for "Fuel Pump Relay 35236082"
The Swedish auto parts relay works OK for $20.
Ebay craps out today for the RSR:
Last summer, new was $20, Now... NO SOAP!
Check here for a Taiwan offering:
https://www.amazon.com/MTC-VP602-1323592-Relay-models/dp/B00BDVP1YU
DON'T MESS WITH USED RELAYS! UGH!
The OBD system doesn't reset itself.
Check again, each port for 1-1-1
Look at your ignition at night in the dark: Look for corona around the coil,
wires and distributor cap. Moisture aggravates any faults there.
Use only an OEM quality Distributor cap!
You never said what the plugs look like after the car acts up?
The plugs tell a story.
Cheers, Bill
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