I haved changed the oil, fuel filter, plugs,wires,and dist.and rotor. It cranks but will not start.
Sep 15, 2010 at 1:34 PM
1988 Volvo 740 no spark
1988 VOLVO 740
MTMFREE
- MEMBER
- 2 POSTS
- FOLLOW
Advertisement
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
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
Sep 15, 2010 at 2:45 PM