1988 Volvo 740 no spark

Tiny
MTMFREE
  • MEMBER
  • 1988 VOLVO 740
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 139,000 MILES
I haved changed the oil, fuel filter, plugs, wires, and dist. And rotor. It cranks but will not start.
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Wednesday, September 15th, 2010 AT 1:34 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi mtmfree, Welcome to 2carpros and TY for the donation

Lets do below to determine if its a fuel or spark problem and comeback with some testing results we start here.

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, cap and rotor, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing
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Wednesday, September 15th, 2010 AT 2:45 PM

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