low idle problems
#1
low idle problems
since i bought the truck it has been idling low and slightly rough. when warm it idles at around 490-510 and can feel it being a little rough. but at a stop, on the brake, and push the gas a little to 1000 and let go it will drop and stay to 700 and run smooth until i start moving.
truck is a 03 hemi with 34k on it and i just replaced the plugs. what is it supposed to idle at? and is there any way to raise it?
truck is a 03 hemi with 34k on it and i just replaced the plugs. what is it supposed to idle at? and is there any way to raise it?
#2
#5
I just went through this problem too, Things you should check: Clean the TB, Replace the PCV, Check and Replace the EGR (if 03s have one im not sure), and check the plugs. I had the low idle right at 500 and did all of these except the plugs and it didnt change anything, BUT i never had a rough idle. I finally just bought a diablo tuner to raise the idle myself. Since you have a rough idle I would start by checking out that Throttle Body and PCV valve.
All you have to do is take off the big plastic breather tube and there are 4 bolts and a wiring connector holding on the TB, I cleaned mine with brake parts cleaner and a rag. If you look to the left of the TB there is the PCV valve that you can just twist right out, I just replaced mine but I dont think it was faulty. If you can see a bunch of junk gumming up the insides of it then thats your problem. (assuming you have the HEMI then all this applies, im not sure about the 4.7)
All you have to do is take off the big plastic breather tube and there are 4 bolts and a wiring connector holding on the TB, I cleaned mine with brake parts cleaner and a rag. If you look to the left of the TB there is the PCV valve that you can just twist right out, I just replaced mine but I dont think it was faulty. If you can see a bunch of junk gumming up the insides of it then thats your problem. (assuming you have the HEMI then all this applies, im not sure about the 4.7)
#6
#7
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#8
Yeah I see that too, I think you can advance the spark and such, but most of the options are for 04+. And no the dealers all told me that 500rpm was normal, and that they couldnt do anything about the idle, which is BS to me. I called 3 different dealers and got the same thing. If all else fails, you can get a 180 Thermostat and trick your computer into higher idle because the comp will think that it is always in warming mode. But before you go that route, definately check those other things first!
#9
#10
when warm it idles at around 490-510 and can feel it being a little rough. but at a stop, on the brake, and push the gas a little to 1000 and let go it will drop and stay to 700 and run smooth until i start moving.