3.0l lowrpm idle

[jracecrazy]

Hi I got a problem whit the 3.0 l that the is idle too low like 500rpm its been doing this for a long time and is runing but it want to turn off at a stop light and I have to put the car in nuetral to keep it running. any help or advise on this?

[92lebaronGTC]

When was the last time the spark plugs, wires and other ignition components have been replaced if ever? A weak spark can cause a lot of issues. Also dirty injectors, dirty air filter, or a weak fuel pump can cause some other issues.

Does your transmission work fine otherwise? How does the fluid look?

Also try pulling engine codes to see what may have come up in the computer. Here's how you can do that.

"How To Get The Fault Codes
Shut your engine off if it is running. Turn the iginition key to the on and off positions (do not turn the key to the start position) within 5 seconds using this sequence: ON-OFF-ON-OFF-ON.

The "Power Loss", "Limited", or "Check Engine" light will begin flashing. By counting the number of flashes between delays, you will retrieve two digit numbers. So, for a code 12 and a code 55, you would see the following sequence:

FLASH-(delay)-FLASH-FLASH-(long delay)
FLASH-FLASH-FLASH-FLASH-FLASH-(delay)-FLASH-FLASH-FLASH-FLASH-FLASH

All code sequences end with a code 55, so once you've received a 55 there are no further messages. If you just receive a code 55, that means there are no codes to send (the ECU thinks everything is OK). It is also normal see a code 33 if you do not have air conditioning. You will never see more than 7 flashes in a row, so watch for delays. A code will stay in the ECU for 15 engine on/off cycles, so don't expect a code to disappear immediately after you make a repair. To see if you have fixed the problem that generated the code, your can erase all codes by removing power to the ECU (by disconnecting the battery or otherwise) for about 10 minutes. This will clear the ECU's memory and generate code 11 and code 12. Crank or start the engine to see if the code in question returns. The code 11 should disappear as soon as the engine is cranked and the code 12 will disappear after 15 on/off cycles."

Fault Codes - Mini-Mopar Resources is where you can find any codes that come up and diagnose from there what to do or fix.

[jracecrazy]

i have done all that stuff you mention whit no change in the motor the trasmission is working fine whit new oil and filter and I try the codes and only 33 and 55.

[c2xejk]

I would guess that you have a problem with the AIS circuitry or the AIS passages are clogged... The AIS controls airflow at idle...

[Ondonti]

are you using a stock tb?

Maybe you are using a larger tb but your AIS pintle is not happy etc. I used to have a lot of these problems when i was first fooling around with larger tb's and not swapping in the right AIS parts. 46mm pintle sorta gets stuck in the 52mm tb ais passage.

Or its just clogged dirty and sticking.

[jracecrazy]

Am using a stock TB and when I clean the TB this afternoon the sensor looks all the way estended is supost to be that way? After that, no change. I have to buy new sensor and TB sensor too., to see if that's the problem.

[irocelectric93]

o2 sensor?

[lookin]

Sounds crazy I know. But check to see if the nuts that hold your throttle body to the plenum have vibrated loose. It happens.