97 7.3

[oldmechanic]

purchased at auction sounded good & ran good for about 10 miles & lost power
& started missing drove on to shop (2 mi) shut it off & now will not start,after cranking about a minute it acts like it wants to start but will not stay running on it's own. knocks & rattles like it is running on ether & has a lot of blowby
dtc p0344 replaced cps cleared code no change & it reset the same code
what should I check next?
Thanks
OM

 

[ameristar1]

Check the IDM. Get one that is known to work properly. HEUI system needs proper oil level and pressure to fire, so check for any oil leaks. Aftermarket cam sensors can be defective, check all connections for the system including the harnesses that go to the valvecovers and the ones that are under the valvecovers.

 

[h2odrx]

Check the IDM. Get one that is known to work properly. HEUI system needs proper oil level and pressure to fire, so check for any oil leaks. Aftermarket cam sensors can be defective, check all connections for the system including the harnesses that go to the valvecovers and the ones that are under the valvecovers.

What he said, and what does the oil look like? and how much?

 

[oldmechanic]

up date

kept messing with the pos & got it stay running, at idle sounds like it is running on 4 cyl above 1000 rpm is seems to smooth out some but is still missing un plugged connectors to right valve cover no change,unplug leftside & it dies. removed rt vc all wires & connectors in good shape only dtc is 1111.is the idm seperate or in the ecu if seperate where is it located.oil is clean & full
thanks OM

 

[69crewcab]

Check to make sure the wires going to the CPS arent exposed and shorting out against the motor.. Just had the same thing happen on a 99 7.3 and had an exposed wire shorting to the motor..

 

[ameristar1]

The IDM (injector drive module) is seperate from the ECM. The valvecover harnesses can look good and not be good, especially since they are exposed to all that heat; after 12 years and all those cycles, they do go bad. Should be replaced on principle. Replace any and all questionable connectors and harnesses.

 

[jharvey]

The IDM (injector drive module) is seperate from the ECM. The valvecover harnesses can look good and not be good, especially since they are exposed to all that heat; after 12 years and all those cycles, they do go bad. Should be replaced on principle. Replace any and all questionable connectors and harnesses.

Yep, those need to be replaced just on principal, also check the oil level in the HPOP, make sure it is full and not draining down.