1996 Dodge Ram P1391 diagnostic code

[ilxciteu]

I am working on a 1996 Dodge Ram pickup with 318. It is running ragged when it gets hot. When you slow down on stop the truck cuts off 2 - 3 times or more before you can get is going again. I hooked up the OBD machine and got diagnostic code P1391 Intermittent loss of CMP or CKP. We have replaced the crank shaft sensor, cam shaft sensor, distributor cap, and rotor button. It ran fine for a couple of drives and now right back to the same thing. Any suggestions of what to look for now would be greatly appreciated. Thanks.....

[silverado122775]

Have you ran the computer on it sense you have seen the CEL come on again?

I found this, I do not know if it will help but it does mention the PCM may need to be replaced and the CKP may be installed incorrectly.

http://www.actron.com/faq_detail.php?pid=16151&id=16

P1391 Intermittent loss of CMP (camshaft position) or CKP (crankshaft position) signal
Camshaft Position (CMP) sensor and Crankshaft (CKP) sensor signals are monitored with engine running or cranking. Diagnostic Trouble Codes (DTCs) will set in Powertrain Control Module (PCM) memory when the PCM senses failure counter reaches 20 failures for 2 consecutive trips.
Possible causes are:
CKP sensor improperly installed.

Defective CKP sensor.

Defective CMP

Defective PCM

Defective tone wheel/flexplate.

Visually inspect related wiring harness. Check for chafed, pierced, pinched or partially broken wires, defective connectors or defective wiring.

Visually inspect related wiring harness connectors. Check for broken, bent, pushed out or corroded terminals.