Question about 1995 Volvo 940

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95 volvo 940 won't start. Is it lack of fuel or spark or air?

I just replaced my fuel filter because it was running rough, lunging forward. At a red light I would have to give it gas and brake. Then it would take lots of gas to go then it would lunge forward. I bumped into someone, ( who forgave me!:) so I used a couple of bottles of injector cleaner which helped some intermittently. Then I replaced my gas filter which helped some . Now My car ran for 15 seconds then it would not start at all. The next day it ran for a few seconds. As I let go of the key it pops as if it wanted to start. How do i know if it's lack of gas, spark or air?

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  • Anonymous Dec 27, 2008

    clarification. I dont know how to post clarification.
    I put the first bottle of gumout fuel treatment and injector cleaner in near empty and the tank to empty. It improved for a few days then got bad. the second bottle was techron that I put in half full ande filled the tank used half the tank, bumped into someone and replaced the fuel filter...
    Thank you!
    Doug

  • ricky horwood
    ricky horwood May 11, 2010

    tell me what you did with the injector cleaner

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Have you try changing out the air mass meter? It could be dead. The air mass meter is a black Bosch unit that sits by the air filter. Disconnect it and if its doesn't get better. The it has to be replaced.

Posted on Sep 13, 2009

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BEEN THERE.... IT WAS THE CRANK SENSOR... its under the distibutor

Posted on Mar 27, 2013

  • alex Mar 27, 2013

    BEEN THERE.... in my case IT WAS THE CRANK SENSOR... its under the distibutor

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This could be a timing problem, to check for a good spark, remove a plug, reconnect the ht lead, and place the end of the plug, somewhere on the rocker cover, and turn her over. You will then see, just how well it sparks.
But more often than not, it's dodgy connections and/or faulty fuel relay.
It's a common fault, but easily repairable, and cheap.
You will find the relays in the centre console, behind the ashtray.

Posted on Jul 22, 2009

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