Crazy help needed. I have changed the cam sensor and crank shaft sensor in my 07 ram 4.7l in park wont go over 2500 rpm... found a bad ground, fixed that, still stalls...when ignite it gas driving doors lock and unlock. Turned auto lock off. I am showing baro sensor code, -40 on o2 sensors (but no code on the o2 sensor) I replaced MAF, EGR is next as it has a code showing as well... crank shaft sensor....let's not talk about it but I did get it out!! With a concrete screw! This just out of the blue started while I was driving.. hesitated and then acted like it wanted to die. Smells rich, has new plugs. Any ideas as to what may be the issue? Almost like limp mode but I can drive it 60 mph as long as I dont hammer down. Hit the throttle hard it cuts itself like a rev limiter at 2500on the money. Any help would be appreciated, seems electrical to me, maybe a loose ground I cant find. The cam shaft sensor, I replaced is still showing a code, says intermittent circuit, I bought a second one in case first one was defective, same thing, bank 1 intermittent circuit. So I am at a lost and glad to find you all on here. Any help would be appreciated.

Current codes showing: on my Bosch 1350 after cam, crank, maf, ground fix

P0129 baro pressure too low
P0405 egr sensor A low circuit
P0340 cam shaft sensor A circuit (bank 1 or single sensor)
P0107 manifold absolute pressure barometric pressure circuit low input
P0300 random multiple misfires detected
P0633 immobilizer key not programmed em pcm
P0933 hydraulic pressure sensor range/performance
U0195 Lost communication with Sears

Thanks!

 

Check the power feed circuit to the various sensors. Looks like they aren't getting proper input voltage, which will throw off any readings, and thoroughly confuse the PCM.

 

[QUOTE=HeyYou;3447509]Check the power feed circuit to the various sensors. Looks like they aren't getting proper input voltage, which will throw off any readings, and thoroughly confuse the PCM.[/QUOTE

I checked the voltage on the crank and cam sensors. Both ohm out and both are 4.8 to 5 volts. Is there another sensor I should check? Maybe replace the o2 sensors? And thank you!!

 

I think they all get power from the same place in any event..... Think it would be interesting to plug in with a scanner, and see what the PCM is seeing.

 

After tons of wiring checking. I finally got the problem to duplicate. Clear the codes and runs fine until hits a bump. 4th clip down on passenger side has a red wire from green and white runs across the back of the block to the starter...no idea who's jack leg work this was from, but today, I traced down the bundle from the cam sensor and last block of wires to the ecm pushed on the wires the truck hesitated and check engine light came on. Cleared the codes (same as before) and truck ran fine. I think the pin is loose or sheared som and making contact. I have the Haynes manual. Ut cannot line the diagram up. Any advice would be appreciated. Thanks.

 

You need the factory service manual for your truck. The haynes/chiltons manuals are really generic, and the wiring diagrams will not reflect what is actually in your truck...... Factory service manual will have accurate wiring diagrams, and make your life MUCH easier.

 

Ok. I'll see if I can get that. Thanks for your help!! This has been a pain.