Question about 1991 Volvo 740

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Car wont start engine will crank

1991 volvo 740 nt engine will crank and try to start but will not turn over. what are the two relays on the passenger side shock tower for? could it be the pre fuel pump in the gas tank? Battery and alt are good and have been checked.

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One of those relays supply power to the injectors. They fail, as well as the fuel pump relay, rpm sensor, and the main pump. Have you checked the trouble codes in the engine or ignition computers?

Bret
RepairPal.com

Posted on Dec 09, 2008

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1 Answer

Timing jumped


Hmmm. Getting fuel and spark, just died.
Possibilities: Crank position sensor. Sends pulses to engine computer. If it dies, so does engine. Mounted near the transmission bell housing. Check plug which appears near the passenger side firewall. Plug gets corroded. Disconnect and clean all the plug contacts in that area,
Radio supressor relay. Mounted on inner fender, passenger side, above the battery. If it fails, fuel injectors die. Remove it from socket and insert a jumper wire between the two large pins (brown wire). If car starts, buy a new one. About $95 new; less on Ebay. I always carry a spare.
Where do you have spark? Sometimes the high voltage lead from the coil to the distributor goes bad. Disconnect it and hold it near a ground.
Do the same with a spark plug lead.

Apr 16, 2014 | 1991 Volvo 740

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Jan 09, 2010 | 1991 Volvo 740

1 Answer

I have a 1991 740 volvo, was driving down he street and it died,after i pulled over it wouldn't start


Check if you still getting fuel and sparks, two items need to keep the car running. Check fuses and fuel pump relay, if needing new relays go to the junk yard and get couple of them for nothing. Checking making sure you getting fuel and fuel pump working properly, unplug the the main coil wire to distributor so the car wont start we just want the engine just to turn over. under the hood, locate fuel filter, disconnect the line to or from it, wrap the bottom of the hose with old clothe firmly and to remember to point the house downward away from your face so it wont splash at you. and have a friend turn ignition over just like starting, see if the fuel come out with good pressure. if fuses and relay check out, your crank sensor may be bad, being 91' strong possibility. crank sensor send info to computer telling to send fuel to your injectors. For sparks, make sure you plug the main wire to distributor back. pull one plug wire and get spare plug, plug it and ground the plug and have a friend turn the engine over and see if you getting sparks, do not touch the plug, big shock. No sparks, check the coil if you getting 12v, if yes, than your cam sensor is faulty. The cam sensor work just like the crank sensor but telling the computer to send sparks to the distributor. Common for older European cars, crank and cam sensor tend to become faulty after years of service due to age and heat abuse.

Aug 09, 2009 | 1991 Volvo 240

1 Answer

88 740 volvo cranks but shuts off within minutes, has new fuel pump filter and relay


You may have to bend the conections on the fuel pump relay, so they fit tightly. Try gently twisting it l/r, while turning the engine over.
Hope that's it.

Jun 17, 2009 | 1990 Volvo 740

1 Answer

1989 volvo 740 turbo no start problem car will


Try replacing your fuel pump relay,

Jun 16, 2009 | 1989 Volvo 760

1 Answer

Trouble with my cars ECU


Have you ask him about the fuel pump relay,this will cause an no start.

Mar 17, 2009 | 1985 Volvo 740

1 Answer

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.


Feb 13, 2009 | 1991 Volvo 740

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