Cold Weather Idle Problem

The trans problem could just be temp related.Check for TSB's . The idle could be the IAC motor noy liking the cold.Im in socal, when it got cold a little bit back (right around freezing) my IAC motor in my Chevy truck started having a cow.I removed it, cleaned it and lubed it with a drop of motor oil. Dont know if the oil helped, but it hasnt done it since and we had ice 2 days ago.

IAC Valve was Carboned Up with only 20,000 miles on engine. Dodge is telling dealership that this service may have to be done every 30K at a cost of $130.00...

They suggested it may been result of bad fuel, however, I always go with brand name???

Instead, lets spend 5 bucks on a can of carb or brake cleaner.Remove the IAC and clean it yourself

I have a 2005 Dodge ram 4.7 engine. When in park or in drive and not moving, my idle goes from 600 to 1100 RPM's constantly. Once it levels out and I drive, it will do it again when i stop.

have the codes read. check for vacuum leaks and binding throttle.

I recently changed the PCV, would that make a difference

wrong part could
spray throttle body cleaner around the hoses and if the idle changes you have s vacuum leak. re check pcb part #.

what does dodge code p1582 mean? Where is the ac drain location on a 01 Dodge Ram 1500 truck?

I don't have a listing for that code number. If necessary, I'll try to find a Chrysler service manual to find out what it means.

What kind of "idle problem" are you having? Was the battery recently disconnected or run dead?

The AC drain tube is always on the engine-side of the firewall on the passenger side. Look for a 4" rubber hose with a 90 degree bend in it hanging down.

I haven't had a dead battery recently. My truck idles rough when you put it in gear. When your stopped it idles rough

Rough running is typical of a misfire. How long since the spark plugs and wires were replaced?

They were changed 2 months ago

The first thing I would suspect is a plug wire that didn't get fully-seated. That will lead to arcing between the terminal and the spark plug, and eventually the wire will burn back far enough to cause a misfire. Don't overlook the distributor cap and rotor. Check for carbon-tracking, cracks, and moisture.

Normally misfires will be detected by the Engine Computer which will set a diagnostic fault code specifying which cylinder is at fault. When no code is set, consider other causes of harshness such as a collapsed rubber isolator in an engine mount.

I have an 04 ram 1500 4.7L, and when it is idling it will jump between 500-1000rpm back and forth. It pretty much constant. Once you get going its smooth though. What's going on?

This can be caused by a few things, a vacuum leak, idle air control valve, throttle position sensor... Has the check engine light come on?

Ok thanks.

No check engine light coming on. I tried cleaning the throttle body and putting sea foam through the tank. It seems like if I the problem is occuring and I rev the engine it will stop a little while??

What does dodge code p 0305 mean? How do I fix it? It's on a 2001 Dodge Ram 1500 truck.

Check to see if there is normal back pressure coming from the exhaust. I'm wondering if your converter is starting to plug.

P0305 - Cylinder 5 Misfire Detected

Same as any other misfire. Gotta have consistent spark, fuel, compression, valves opening fully and not leaking.

For a while I have been having a problem with my truck. The check engine light comes on intermittenly and goes off in a few days. I put my truck in the shop at the dealership and they claim that the computer didn't pick up that the light has ever come on.

Here's my problem: whether or not the light is on, upon start up, the truck will rev up and down, fluctuating between about 750-1500 rpms and keep revving up and down, back and forth, however you want to call it instead of staying at one rpm. Think as if I were pressing the gas and manually revving up the engine, but instead it's doing it by itself. When the truck is running fine, it usually will idle in park at about 500 rpms. Also, when I am driving at a steady speed, the engine will rev up as I am drving. For instance, if I am drving 60 mph, the typical rmp is around 1500. However, it will jump from 1500 to about 1700/1800 and back down again. And when I am slowing down to stop, the truck will rev up and lurch me forward and will also jam into gears when I am switching between drive, park, reverse, etc because it's running at too high of rpm.

Help?!?!?! I love my truck but it's been in the shop twice and no one will tell me what is wrong.

Is your truck consuming any unusual amount of oil? If it is, the gasket on the bottom of the intake manifold is leaking causing very high idle at startup and when warm. See any smoke when you first start it up?

My 2002 Dodge Ram has 36,000 miles, small V8, 2WD, with no prior problems. When I am in park or sitting at a stoplight, the idle fluctuates up and down sometimes to 2 rpms. This is with or without the a/c on. It can be any time of day. I took it to the dealer and they said it was a dirty throttle body and worn spark plugs. After paying them $510 to clean the throttle, install new plugs, & reprogram the computer, 3 weeks later I have the same problem again. They said it could be something underlying that they didn't see. I would appreciate some help before Thursday because I am going back to the dealer and cannot afford to keep paying them this kind of money! THANK YOU FOR ANY HELP!!!!

Try putting a new idle air control valve on and see if this fixes youre problem.It is located on the back of youre carbarator.

For about the past 6 months on and off my truck will start acting up...It will Run rough Like it wants to stall and any gas worsens the problem Unless i floor the gas it wont get any acceleration....It happens for a while then stops for a few weeks then starts again....The Engine light is coming out to be a bank 1 sensor 1, O2 sensor which i have replaced twice now....I also put a new coil in....The most recent time it seems like my throttle is sticking also causing me to accelerate without touching the gas....When i do touch the gas it start to run rough like it wants to stall....Im out of ideas as my truck does not have an auto choke which i thought might be the problem...Silly me lol

Ya, no choke. It is run by the computer based on information from a temp sensor. As far as the problem, have you checked the basics like vacuum leaks, fuel pressure...? Also, have you checked to make sure the catalytic converter isn't plugging?

Let me know. Also, the engine reving sounds like the throttle position sensor is bad. It will cause the idle to change.

Joe

Hello, I have a 2001 Dodge Ram 1500 with the 5.2L. It starts fine drives fine; however, in park the engine idles up and down from around 700 rpm to 1200 rpm and is worse at cold start. when it warms up it often stops; however, occasionally will do it after driving distantly and restarting. There are no engine lights on, and we tested the computer with my Actron OBD 2 pocketscan tester whith indicated no codes, and the three - key turn indicats "PDONE" , furthermore, there are no dash or engine lights on. Can anyone help me with this?????

It sounds like either a bad throttle position sensor or idle air control valve. Have you checked them?

No. How do you check them? Can a sensor be bad if theres no engine light on?

[quote:2eb213f77e="Jacobandnickolas"]It sounds like either a bad throttle position sensor or idle air control valve. Have you checked them?[/quote:2eb213f77e] No. How do you check them? can a sensor be bad if theres no engine light on?

Here is what I need you to try. Disconnect the IAC when the engine is idleing. The engine should die. If it doesn't, that is bad. As far as the TPS, with the engine running, disconect it. THere shouldn't be a change until you try to rev the engine. Then it should cough and not want to rev.

As far as codes, yes it should have set one. However, it doesn't always happen. Honestly, my first guess is the IAC. You may be able to get away with removing and cleaning it.

Let me know what you find.

The “TPC” is clearly good because the engine became very hesitant and bogged down when I pressed the throttle, and the check engine light came on. I then cleared that code and the check engine light went off.

I then started over with checking the “IACV” and when I unplugged it, the engine continued running with no changes whatsoever, and no check engine light came on, so I pulled the “IACV” and cleaned it as well as the “IACV” bore, which had a lot of carbon build-up. Upon reinstalling the “ IACV” I then started the engine and unplugged the “IACV” again, and let it run for several minutes, and upon killing the engine and restarting it, the check engine light came on; however, again there was clearly no change in the engines operation. I again cleared the computer, re-plugged the “IACV” and started the engine, at which time the check engine light was off and it stayed off. So, I suspected the “IACV” was bad as you suggested, and I ordered one. Upon receipt of the new “IACV” in a few days, and getting it installed, I will let you know how it does. I appreciate your assistance and hopefully this works because I just purchased this truck and got a great deal on it; however, I really can’t afford putting much more money into it anytime soon. Thanks again, Shannon.

It should have killed the engine when disconnected.

Let me know what you find.

Joe

Joe, the tps and the iacv was bad. The tps was making the transmission shift in and out of gear.

Is it working properly now?

Yes the truck runs great. The TPS was most of the problem. Thank you for all your help

Nice truck. I'm glad it helped. Let us know if you have questions in the future.

Joe

idle surges up and down after idling for a few min.

clean out the throttle body/plate, check for vaccum leaks and check out the IAC module.

those will all cause your vehicle to perform as you have listed, and are easy fixes and checks.