1998 Dodge ram 2505.9 L V8 will hardly idle when cold once it warms up it's smooths out, is there a choke pull off or anything on this engine? Sounds like there's a vacuum leak when it's running really rough but it's fine once it smooths out

Asked by Taurus_442 Feb 08, 2015 at 12:39 PM about the 1998 Dodge RAM 2500 Laramie SLT Quad Cab 4WD

Question type: Maintenance & Repair

3 Answers

13,555

there is a couple of things is you could have a sticking IAC Motor (Idle air control motor) and its not letting it open enough ...or you have a bad coolant temp sensor and it thinks that the engine is not cold and not going into the correct fuel loop for a cold engine ...I would take the throttle body off and remove the IAC motor and clean them then after you reinstall them do a battery disconnect for 15 seconds ...the engine may not want to run at first because you reset all the values but just keep it running and once warm restart it several times

3 people found this helpful.
Best Answer Mark helpful

Also upon moderate acceleration the heater switches to defrost every time like there's a loss of vacuum soon as you let go of the accelerator pedal it goes back to the floor position

3 people found this helpful.

Did you ever find out what was wrong? This is happening to my 1998 5.9 vin z right now and I cannot seem to find the issue??

Your Answer:

RAM 2500

Looking for a Used RAM 2500 in your area?

CarGurus has 1,002 nationwide RAM 2500 listings starting at $6,400.

ZIP:

Own this car?

Share your experience with others.

1998 Dodge RAM 2500

Review another car

CarGurus Experts

  • #1
    Dan Connell
    Reputation
    5,600
  • #2
    Ram2500Diesel
    Reputation
    1,600
  • #3
    Tony Williams
    Reputation
    1,540
View All

Know more, shop wisely

Search

Related Models For Sale

Used Chevrolet Silverado 2500HD
1,078 Great Deals out of 30,426 listings starting at $3,800
Used Ford F-250 Super Duty
1,434 Great Deals out of 41,335 listings starting at $3,995
Used Dodge RAM 3500
35 Great Deals out of 482 listings starting at $7,999
Used Dodge RAM 1500
87 Great Deals out of 1,534 listings starting at $1,800
Used Ford F-150
6,021 Great Deals out of 127,344 listings starting at $1,995
Used Ford F-250
206 listings starting at $7,495
Used Chevrolet Silverado 1500
4,096 Great Deals out of 130,276 listings starting at $2,995
Used Ford F-350 Super Duty
957 Great Deals out of 22,034 listings starting at $3,995
Used GMC Sierra 1500
1,878 Great Deals out of 64,496 listings starting at $3,400
Used Toyota Tacoma
1,865 Great Deals out of 30,367 listings starting at $3,500

Used Cars for Sale

2010 Dodge RAM 2500 For Sale
66 listings starting at $9,000
2009 Dodge RAM 2500 For Sale
6 Great Deals out of 68 listings starting at $7,500
2008 Dodge RAM 2500 For Sale
7 Great Deals out of 99 listings starting at $6,995
2007 Dodge RAM 2500 For Sale
15 Great Deals out of 148 listings starting at $7,995
2006 Dodge RAM 2500 For Sale
12 Great Deals out of 178 listings starting at $6,400

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.