Take the 2-minute tour ×
Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. It's 100% free, no registration required.

When I start my Dodge Ram 1500 in the morning, the RPM goes up and down for about 4 times from 1000 to 2000 and it sounds like the truck is gonna shut off. It also has a check engine light on. Just bought the truck. What might be the cause of this? Thanks.

share|improve this question
    
Please add more information. Year, Engine Size, Transmission Type (AT/MT + 4x4/2x4) –  cinelli Mar 30 '13 at 21:02
1  
Does is the issue still present once the truck is at operating temperature (all warmed up)? –  cinelli Mar 30 '13 at 21:07
add comment

1 Answer

Bad idle or auxiliary air valve of some sort. Cold-air valve, idle-up solenoid, EGR valve.

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.