1991 Mazda b2600 Repair Question
Mileage: No information provided.
Troubleshooting
Answer
Do below as suggested and comback with your testing results
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, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-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
If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems
with compression and valves opening and closing at the wrong time/broken or jumped timing
belt/chain.
fuel filter,pump work good.put a noid light on injecters all good.cam sensor is in the new distributer,crank sensor didn't come out until 1995,blue spark present(bluish white w/yellow halo),coil input voltage 12v,all cylinders had over 120-150 on the compression,bought a computer and had it updated and is garranted