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I must have touched something 745T now won't run after working on vacuum 700 1991

posted by  B.B. on  Sat Jul 23 10:54 CST 2022
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last visit: Mon Oct 6 13:15 CST 2014
[RELATED]

Hi Bob,

Get the Volvo wiring manual for your car, all others are a poor second best.
Go here: https://www.matthewsvolvosite.com/forums/viewtopic.php?t=34333
see if you hit paydirt. You want the Volvo book TPXXXXXXX.
also go here for the volvo engine schematics and component locations:
http://www.autoelectric.ru/auto/volvo/740/1989/740-89.htm

There's two relays that can kill fuel.
The main fuel relay in the main fuseblock, and the RSR in the engine bay.
They are computer controlled and often get squirrely by failing intermittently.
Only replace with new relays for these two.

Bill





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