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 Feb 08, 2015 at 12:39 PM about the 1998 Dodge Ram 2500 Laramie SLT 4dr 4WD Extended Cab SB

Question type: Maintenance & Repair

2 Answers

4,955

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

1 of 1 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

2 of 2 people found this helpful.

Your Answer

Dodge Ram 2500 Experts

  • #1
    Dan Connell
    Reputation
    2,260
  • #2
    Ram2500Diesel
    Reputation
    670
  • #3
    tennisshoes
    Reputation
    570
View All

Related Models For Sale

Used Dodge Ram 3500
73 Great Deals out of 2,228 listings starting at $5,999
Used Ford F-250 Super Duty
332 Great Deals out of 47,501 listings starting at $1,899
Used Dodge Ram 1500
414 Great Deals out of 10,795 listings starting at $1,499
Used Ford F-350 Super Duty
336 Great Deals out of 26,219 listings starting at $3,300
Used Ford F-150
2,762 Great Deals out of 211,558 listings starting at $1,400
Used Chevrolet Silverado 1500
2,454 Great Deals out of 173,305 listings starting at $795
Used Ford F-250
430 listings starting at $2,995
Used Chevrolet Silverado 2500
6 Great Deals out of 209 listings starting at $4,495
Used GMC Sierra 1500
1,135 Great Deals out of 65,444 listings starting at $1,995

Used Cars For Sale

2010 Dodge Ram 2500 For Sale
10 Great Deals out of 348 listings starting at $8,791
2009 Dodge Ram 2500 For Sale
8 Great Deals out of 286 listings starting at $7,995
2008 Dodge Ram 2500 For Sale
32 Great Deals out of 630 listings starting at $8,499
2007 Dodge Ram 2500 For Sale
32 Great Deals out of 800 listings starting at $4,900
2006 Dodge Ram 2500 For Sale
22 Great Deals out of 1,110 listings starting at $6,588

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.