annother possibility is its the knock sensor thats malfuntioning ive seen several that have that issue and also if the tps goes on the fritz it can have almost same problems.

 

FOUND the problem, we removed both sensors again and tested their resistence hot and cold, CMP was showing over 8.59 Megaohms, way to high

 

OF:
Glad to hear you got to the bottom of it!!! I know these types of issues can sometimes be a real bear to pin down. Good work and congrats!!!!!!!

Don

 

This is not a question but a solution. Our company runs a 1999 Dodge Durango 5.9 V8, which was having problems starting. We have been online multiple times to see if others had a solution and we found that owners were spending 1000's $ trying to figure the problem out to no avail, replacing part after part.
The PROBLEM:
Drive the Durango shut it off - go to start and would crank only - leave it for a while - come back start right up. Check engine light came on stayed on, threw a P0340 code (according to manual and dealers - no Cam shaft sensor on this model - it was throwing a false code). Little by little problem got worse to point Durango would not start at all. Seemed like it might be factory alarm with engine kill.
OTHERS ONLINE TRIED:
Coil; Crank Sensor; IAC; battery replacement; new distributor cap, rotor and plugs; replacement and/or flash of PCM; Throttle Positioning Sensor; Fuses; amoung other items. Brought to Dodge they could not figure it out.
WE FOUND IT TO BE:
Distributor pickup which duals as a cam shaft sensor. This is located under the distributor cap. A $50.00 part solved the problem.