Tach reading low rpm at idle

06 QC tach reads low rpm at idle but when on the gas it reads normal. I am sure this has been discussed before so I apologize in advance. lol any advice would be gretly appreciated.

New2srt10 said:

06 QC tach reads low rpm at idle but when on the gas it reads normal. I am sure this has been discussed before so I apologize in advance. lol any advice would be gretly appreciated.

Click to expand...

Is all stock ? When were the plugs replaced ? Tuneup !

Battery? Alternator ?

It is a regular thing for all 06 rams. There are videos on Youtube to fix. Easy fix. Did it to mine in about 30 minutes. You have to refloat the soder on a couple of chips and put in a couple of spacers.

Ok, I watched a couple of videos and doesn't look to difficult. Just taking dash all apart seems to be the worst part I guess. lol yep vipr pwr its all stock except for cai, oil catch can and cat back exhaust. She runs well.

I had a collapsed electrode on one of my spark plugs.. tach read low .. gas mileage was lower but it ran great and showed no codes .. I had a tune and thought maybe it’s the tune , had the tuner check it and do some adjustments ... didn’t matter nothing changed. I had replaced the plugs just recently at that time .. ran the truck for many years .. took a long road trip last year .. ran fine until the day after started home from the trip .. I started feeling a very slight miss at low speeds but cleared up while cruising at highway speed .. figured when I get home it was time to check and change the plugs again ,, also was showing codes . I pulled the plugs and found a collapsed electrode on one .. changed them and to my amaaaazment the slight miss was gone . Tack was smooth reading and the RPM was up a bit , normal spec, I also gained the mileage back that I lost .. went from 10.4 highway to over 14 highway .. moral of this is when you change your plugs make sure the gap is correct and don’t unintentionally bump the plugs when installing them.