engine trouble, need serious help!

Asked by Mar 03, 2016 at 07:49 PM about the 2003 Dodge Ram 1500 SLT SB 4WD

Question type: Maintenance & Repair

Hey everyone!
         I was having a problem with  my 03' ram 1500 with a 4.7 magnum
engine, so i decided to do a tune up by cleaning the throttle body and
changing the plugs. the coils seemed to be just fine (no cracks or damaged,
put in the way i took them out) and then when i turned the truck over it was
running worse than before. Before the tune up, everytime i went to accelerate
the rpm's would drop and then go back up. Now i put the pedal to the floor
and go nowhere fast. and my exhaust sounds completely different and i have
no idea what else to do, please help!!

7 Answers


you did put just a dab of dielectric grease on the coil over boots and coated them, right?

no i didn't use any


Then you may have high energy spark leaking around the boots.

what can i do about the rpm's dropping then rising ?


The ECM will have to readjust the idle itself after it starts running better, this can take as long as 30 minutes of normal driving. You did use throttle body cleaner and not some other cleaner right?

i used the throttle body cleaner and not any other cleaner


Ok good, I was hoping you did that, did you reset the computer after the tune up and cleaning? If not you can go to most parts stores and they can clear the system, usually it is free. Then you can run the relearn protocol, but put some of the dielectric grease before you do anything else.

Your Answer

Ram 1500

Looking for a Used Ram 1500 in your area?

CarGurus has 10,490 nationwide Ram 1500 listings starting at $1,995.


Dodge Ram 1500 Experts

  • #1
    Dan Connell
  • #2
  • #3
View All

Related Models For Sale

Used Ford F-150
2,943 Great Deals out of 230,829 listings starting at $1,300
Used Chevrolet Silverado 1500
2,597 Great Deals out of 157,669 listings starting at $1,500
Used Dodge Ram 2500
159 Great Deals out of 5,332 listings starting at $2,999
Used GMC Sierra 1500
1,084 Great Deals out of 61,727 listings starting at $1,295
Used Toyota Tundra
611 Great Deals out of 36,207 listings starting at $1,500
Used Toyota Tacoma
550 Great Deals out of 41,072 listings starting at $2,999
Used Ford F-250 Super Duty
403 Great Deals out of 47,758 listings starting at $1,700
Used Nissan Titan
322 Great Deals out of 21,989 listings starting at $1,995
Used Dodge Dakota
73 Great Deals out of 3,404 listings starting at $1,475
Used Chevrolet Colorado
315 Great Deals out of 43,558 listings starting at $1,695
Used Ford Mustang
332 Great Deals out of 41,500 listings starting at $1,488
Used Dodge Ram 3500
74 Great Deals out of 2,251 listings starting at $5,950

Used Cars For Sale

2006 Dodge Ram 1500 SLT SB 4WD For Sale
29 listings starting at $2,995

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.