Question about 1991 Volvo 740

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Volvo 740 does not start

The engine is 2000 cc , no turbo. When the engine is hot ( after driving more the one hour ) there is not starter. I can start the car by using another battery. If the i will wait for two hours i will be able to start the car. If i am using the AC the problem is warst. The battery and the alternator are new. The problem was before and after replacing these two. Is it a relay ? Which relay ?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 10 Answers

SOURCE: overdrive relay

Clean or replace the solenoid on the tranny itself.

Posted on Sep 17, 2008

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SOURCE: COLD START ISSUE

try pushing the 4 wires on the radio supression relay into the connector, then try starting it... does it start, run, then die? those connectors ****, i've had the same prob. have you let it huff on some ether? (starting fluid) does it come to life? that would confirm weather or not it its fuel related. my 740 i was loosing voltage to my injectors 10 volts and under, causeing them to inttermittantly not fire, caused by a bad connection at that supression relay.


Posted on Mar 10, 2009

  • 121 Answers

SOURCE: Daihatsu Rocky 4cul 2.8 cc 105ps diesel

i recon you maybe best to get the correct codes from the main dealer

Posted on Jun 05, 2009

  • 35 Answers

SOURCE: volvo 850 won't start occasionally

Hey Kolby!

Sounds like you've got an issue with your alarm module, causing the immobilizer to activate (also known as a "start inhibitor"). I'm not sure what type of alarm you've got, but this will probably help you find out if there is something wrong with it:

There is a panel with relays on it behind the dash. At the bottom of the steering column, by the drivers feet, there is a panel. Remove it to get access to the relay panel (just a couple of torx screws, no breakable clips as far as I can remember). Remove the "double size" relay (probably marked 210-211). Put a wire between the terminals 50E and 50F. This will hotwire the immobilizer and make sure that it always activates when turning the key.

Drive around with the wire in place instead of the relay for a while to see if this helps. If it does you'll know that the problem is related to the alarm system. Keep in mind that you will be without alarm and therefore probably also without remote central locking while doing this.
Make sure that the wire is connected firmly enough so it doesn't come loose. You can also put a fuse on it if it makes you sleep better at night ;)

Good luck!

Posted on Jun 27, 2009

Murphybanton
  • 2004 Answers

SOURCE: service engine message on message center

The fuel pump which is located in the fuel tank beneath the back seat has gotten bad. Consider replacing it.

Cheers and rate this solution.

Posted on Sep 05, 2009

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