Hey folks,been messing with this old truck for 3 weeks on cranking but not starting.It Will fire sometimes then not????New plugs,new coil,new gas tank fuel pump with the gas pressure sensor and vapor valves,cleaned the mass air flow sensor new ignition,checked the ohms on the throttle positioning sensor.Will fire on either then dies….about done with her but can’t afford another truck,any suggestions?Thanks in advance

 

Put a fuel pressure gauge on the fuel rail. 28 psi minimum to run. Check the fuel cutoff inertia switch. Can you hear the fuel pump prime when you turn the key on?

 

I checked the switch on the bottom of passenger side behind panel and will get a fuel pressure gauge for the Scrader valve on fuel rail tomorrow.Thank you

 

Rail pressure was 40 psi,finally changed crankshaft sensor,which was quite a chore.Fired right up 3 times in a row.Thanks for your assistance.

 

Question; Did the old sensor have oil on the face? If it did you might have an oil leak somewhere and the oil film is not letting the sensor work correctly.
My sons 96 Corolla had the same exact problem you were having. He kept HAVING to replace the sensors until he had the crank seal replaced. No more oil leaks to foul out the crank sensor.

 

Question; Did the old sensor have an oil film on the face? If it did you might have an oil leak somewhere and the oil film is not letting the sensor work correctly.
My sons 96 Corolla had the same exact problem you were having. He kept HAVING to replace the sensors until he had the crank seal replaced. No more oil leaks to foul out the crank sensor.