Question about 1991 Volvo 740

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Timing on 1991 740 (non-turbo)

Couldn't get car started... we tried everything then my friend the certified master mechanic moved the distributor. said he only moved it maybe 2 degrees at the most. turns out after we read the codes that the oxygen sensor was bad.... can i use a timing light to put the distributor back... since i haven't gotten the sensor yet i don't know if it effected the timing or not.... car fluctuates slightly when car is warmed up I'm assuming that is the oxygen sensor other than that no missing or rough running. its only rough to start it. other than that it runs great!

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  • David Westhoff Dec 05, 2014

    it was the oxygen sensor after all!

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Several years ago, my 1992 740 would start sometimes and sometimes it would not. I checked my the crankshaft sensor cable. It is located behind the engine. One part of the cable goes to the transmission. You can reach it from the engine comparment. The cable had exposed wire and cracks. I changed it. No problem starting until lately. I had to have my starter rebuilt.

Posted on Aug 22, 2008

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Even your freind adjust it it should run deal the timing later,check if you have spark,then check it if you have gas coming in,the way you describe the problem is you have a cold starting problem,you gonna check a lot of thing in there,the best thing i can tell you is chance your ECT get it from the dealer

Posted on Jun 20, 2008

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