howdy..new to this and trying to look for some answers on my truck..i own a 2004 1500 slt with a 5.7...having troubles with it..when I come to a stop it wants to idle low at 500..then I can watch rpm gage jump up and down then die..if I hold gas pedal down a bit it doesn't do it..i have taken it to a mech and he has cleaned the throttle body and egr..replaced crank sensor and the cam sensor..and it still does it..so what is next or where do I need to start looking..thanks for all the help..well guess I got you guys stumped..you have read post..but no answers huh...I read other post..i get it might be the tps..throttle body..o2..and a few other things..would like to hear from you people on what to check and maybe narrow it down a bit..how about it..a little help here...thanks

 

Do you have a CEL on?

 

ok..not sure what CEL is...can you explain..

 

Sorry.

If you have a CEL (Check Engine Light) on the you have stored DTC (Diagnostic Trouble Codes) stored which will tell you faults the PCM (Power Control Module AKA computer) has found

 

yes..cel is on..will have to take it to be read..also noticed yesterday when I drove it while at a stop light a lighting bolt came on..when I put foot on gas pedal and raised rpm up a tad to about 600 it went off..what was that all about..thanks for your help..will try to get it read in next couple of days..again thanks

 

That is letting you know that there is something wrong with your charging system, either battery or alternator. When you pressed on the gas your rpm rose which spun the pulley on your alternator causing it to produce a higher voltage, thus turning your dash light off.

 

On another thought, if there is something wrong with your charging system, then maybe when you slow down the fuel pump is not getting the voltage it needs and is causing your truck to idle way down. Check your alternator and your battery and I bet that fixes all your problems.

 

My question is..If you had a cel on and the lightning bolt on, Why did this guy change the crank and cam sensor ? sounds to me like he was just guessing and throwing parts at it to charge you for something. A real mechanic would've scanned the codes and fixed what was really wrong

 

I also have an 04 1500... I had a similar problem over the winter. I ended up cleaning the idle air control valve and the problem cleared right up. It's right under the throttle position sensor (on the 4.7L). Here is the link to my post: https://dodgeforum.com/forum/3rd-gen...when-cold.html

Also, for your Check engine light, save yourself a trip and to the on-off-on-off-on procedure (without actually cranking the vehicle) and get the codes yourself.

 

Lighting bolt is electronic throttle issue. Nothing to do with charging system. You need to do the key trick. Or go to AutoZone, and have them pull the codes. Then we can help you better.