7.3 cranking but won't start… is it the CPS or something else?

Advice Needed
21

Drue said:
@Harley
The FPR screen is on the driver’s side of the fuel bowl. Also, check the HPOP reservoir—oil should be within an inch of the top. Cranking with the ICP unplugged might help too.

I’m calling it for tonight—new CPS, filter, topped-off oil, and still no start. I’ll check the HPOP reservoir and might tear apart the fuel filter housing next.

22

Are you having trouble cranking or starting?

23

Ocean said:
Are you having trouble cranking or starting?

It cranks fine. I’ve got a newer relay, solenoid, and starter.

24

Harley said:

Ocean said:
Are you having trouble cranking or starting?

It cranks fine. I’ve got a newer relay, solenoid, and starter.

Poor wording in my original post—I can’t get it to start at all now, just cranks.

25

@Harley
Check your battery voltage with a voltmeter. It should stay above 10 volts while cranking and be around 12.5 when idle. If that’s fine, tap the starter with a hammer to see if it engages.

26

Just to clarify: The truck would start for a few seconds, sputter, and die earlier today. After replacing the CPS, it’s back to just cranking with no start.

27

Harley said:
Just to clarify: The truck would start for a few seconds, sputter, and die earlier today. After replacing the CPS, it’s back to just cranking with no start.

Do you have a scanner to monitor it while cranking? Check fuel pressure and the fuel bowl too.

28

@Ocean
I don’t have one, but a fuel filter replacement is easy and cheap, so I’ll start there.