2006 5.9 engine miss when first start up? Help?
 

I've posted on here before about my 2006 5.9 running away with me and I had to replace the engine and I had the injectors rebuilt by F1.

For the last 8 weeks it has been at Pueblo Pump and Injector looking for the miss that only shows up early in the morning and goes away in about 1.5 minutes and engine then runs great.

They have replaced the injectors several times from F1, they were very good on support of this problem. It all showed an injector problem a couple not running at 100% they would range from 86 to 92%.

They Did compression check 6 times, leak down test 6 times. Replace the Fuel rail, replaced a $2400.00 ECM. Pueblo injector has spent their own money and bought 6 new injectors and put them in and it still has the problem. They have checked the wiring harness, replaced the valve cover gasket. Fuel tubes and lines replaced too.

Like I said, I only have a miss when it is cold then it goes away after a minute and a half.

Dodge does not know what to do anymore and Sean the Mechanic has pulled his hair out and has helped so much on this that I can not say enough GOOD THINGS ABOUT HIM AND PUEBLO INJECTOR.

I called cummins in Denver and they did not want to talk to me and I asked Sean to call them on Friday and he did and they said they would get back with him on Monday? They did say I could bring it up to them?

Any help any one has would be greatful. My truck has been down for 8 months now, new engine, waiting for injectors and now this.

Please help if you can. J.R.

Have they tried the compression test when its cold? And is it a single cylinder miss or is it several cylinders missing. Is it the same cylinders every time?

Test when cold
 

Yes they tested each cylinder when cold and then they did a leak down test. The did both test wam and cold with the same results. they done these six times and they said nothing is wrong with the engine, it has to be electrical or fuel but are out of things to go to now.

Anything you might think of?

no offense but spend 5,000 dollars chasing a 90 second miss when cold, you earn your money WAAAAAAAAAAAAAAAY too easy. if the truck runs great the rest of the time why bother? My 03 has had the same miss for 180,000 miles runs great and gets 19 plus mpg, i worry when it doesn't miss cold now.

Have you replaced the FCA, COV, and the CP-3?


Intermittent miss cold could be ANYTHING from the CP-3 to the injector tips.

When mine had a first start miss, I traced it to bad fuel. New fuel solved the issue.