I have a 2001 dodge ram that quits when it warms up. I replaced the crank sensor started it up now the motor is knocking and get code p1391. this is not good because I just purchased the hughs plenum gasket but now I am scared to install it with the knock. the motor now seems to be flooding out idling up and down and sounded like its sucking air. I have read posts for hours on here im stumped thanks

 

P1391 Intermittent Loss of CMP or CKP
What brand crank sensor did you put in it? Code is for intermittent loss of crank or cam sensor. What does the knock sound like pre ignition or something metallic?

 

I would suggest replacing the cam sensor too.

 

thanks for the help. I dont think the knock is in the bottom at all. I am going to get a cam sensor next. The crank sensor isnt the cheap one it has 3 year warrenty. I am going to have to send it to a mechanic I guess

 

It idles rough almost no power stalls out I replaced both cps and cks, plugs wires cap and rotor timing chain and gears but still runs rough and idles horrible I can hear the sucking threw the intake so i used carb cleaner on it, still runs bad and throws crank shaft positioning sensor and loss of cam shaft codes, and now it's got a electrical charging system low output code but still output is 12 v what am I missing here

 

12 volts is battery voltage. Charging should be north of 14. Low voltage will give you some truly interesting performance problems. Fix that first.

Also, what brand sensors did you buy? These trucks really don't get along well with aftermarket sensors, in critical locations....

 

just an update, I did replace both the crank and cam sensors distributer plugs wires etc. truck worked awesome for a week then took a bad one like it jumped its timing or something. its showing code p0340. any ideas? should I buy another sensor? I believe they are a brand called standard thanks

 

also it now wont start

 

Are you getting spark?

 

looks like no spark