1986 volvo 740 fuel issue

Old Sep 15, 2015 | 04:19 AM
  #21  
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Originally Posted by pierce
removing the main ('fuel pump') relay should render the engine inoperable. no fuel pressure, no ECU, no injection == no run.
Thats why i wanted to show you the video. It runs without the relay and has an excessive amount of fuel at all times now like my 1991 740. The only way to start either is relay out then quick start then with the 91 relay back in to keep her goin and with the 86 relay stays out and she goes for AWHILE by herself or the pump keeps pumping or it might die eventually and i can keep her runnin with my foot on the gas and revved up with the relay in but she dies the second i accelerate in gear.
 
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Old Sep 15, 2015 | 12:30 PM
  #22  
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no mo volvo
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then either your car has been rewired in some crazy manner, or you're pulling the wrong relay.
 
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Old Sep 15, 2015 | 01:32 PM
  #23  
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p.s. your video is marked 'private' and can't be watched.
 
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Old Oct 19, 2015 | 09:25 PM
  #24  
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Can you still not see the video? Upon testing the car again today i had the injectors not do anything period about 6 times then i moved the fuel rail position a bit since i needed to see it from inside the car. I also observed normal spray patterns i Guess but at one point i seen the injectors keep spraying for an extended amount of time . i moved the key a certain way and got a weird pattern from the injectors but also got the same results from messing with the turn signal switch.

I think the injectors are being grounded out somewhere along the wire but dont know what to test.


that link right there works for the video.
 

Last edited by one to remember; Oct 19, 2015 at 09:37 PM.
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