98 3500 cutaway, ready to scrap it.
#1
CF Beginner
Thread Starter
![Default](/forum/images/icons/icon1.gif)
Here's the issue- it always cranks but sometimes it'll start up but not really, either way it will not run even when it acts like it's going to start. In the beginning it was very intermittent and only in cold weather if we stuck it in a shop over night it was fine but it progressed to get worse.
new parts are-
F/P
Distributor
F/P relay
Spider and Reg
Crank Sensor
Plugs
Wires
Coil
Ignition Control Module
Even hooked up a computer out of one of the other trucks we have and it does the same thing, all new ground cables. Blue spark, 60 psi of fuel. The codes haven't been checked in some time but the last time I messed with it, it only had a couple abs codes. So any advanced gurus got a idea? I don't believe there is a fuel pump control module on these older ones nor a bcm. So I'm just kinda out of ideas.
new parts are-
F/P
Distributor
F/P relay
Spider and Reg
Crank Sensor
Plugs
Wires
Coil
Ignition Control Module
Even hooked up a computer out of one of the other trucks we have and it does the same thing, all new ground cables. Blue spark, 60 psi of fuel. The codes haven't been checked in some time but the last time I messed with it, it only had a couple abs codes. So any advanced gurus got a idea? I don't believe there is a fuel pump control module on these older ones nor a bcm. So I'm just kinda out of ideas.
Last edited by David Goodrich; September 19th, 2020 at 6:10 PM.
#2
I'm here for the party
![Default](/forum/images/icons/icon1.gif)
i know you replaced the grounds but did you clean the contacts? not 100% on the motor youre working on but does it have camshaft position sensor?
#3
CF Beginner
Thread Starter
![Default](/forum/images/icons/icon1.gif)
Yes it was a complete brand new distributor from GM itself camshaft position sensor is internal on it this is a 5.7. And yes all contacts were cleaned, however I'm thinking about changing engine harness next.
#4
![Default](/forum/images/icons/icon1.gif)
Here's the issue- it always cranks but sometimes it'll start up but not really, either way it will not run even when it acts like it's going to start. In the beginning it was very intermittent and only in cold weather if we stuck it in a shop over night it was fine but it progressed to get worse.
new parts are-
F/P
Distributor
F/P relay
Spider and Reg
Crank Sensor
Plugs
Wires
Coil
Ignition Control Module
Even hooked up a computer out of one of the other trucks we have and it does the same thing, all new ground cables. Blue spark, 60 psi of fuel. The codes haven't been checked in some time but the last time I messed with it, it only had a couple abs codes. So any advanced gurus got a idea? I don't believe there is a fuel pump control module on these older ones nor a bcm. So I'm just kinda out of ideas.
new parts are-
F/P
Distributor
F/P relay
Spider and Reg
Crank Sensor
Plugs
Wires
Coil
Ignition Control Module
Even hooked up a computer out of one of the other trucks we have and it does the same thing, all new ground cables. Blue spark, 60 psi of fuel. The codes haven't been checked in some time but the last time I messed with it, it only had a couple abs codes. So any advanced gurus got a idea? I don't believe there is a fuel pump control module on these older ones nor a bcm. So I'm just kinda out of ideas.
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