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Drove the truck again this weekend to warm it up. No surging still. I am pretty happy about that. Sent from my iPhone using Tapatalk

Ok, just closing the loop. Maybe this will help others. Day after I posted last, I added the fuel additive. I let the tank sit since then. I probably was a little heavy on the dose since my tank was not full and my gauge is not working…. So I guessed add rounded up. I did nothing else…...

Gonna try this. I also bought a brand new primer/filter base. The price was right, so I bought it. We will see if that fixes anything. I will update with my results.

500 miles maybe and 1.5 years…. Barely turning darker Sent from my iPhone using Tapatalk

For reference: The video Ronmar was referring to. Sent from my iPhone using Tapatalk

I will look for your video. Thanks! Sent from my iPhone using Tapatalk

I will give that a shot….. if nothing else, the engine may like it. Did you find you had to add it every tank or just occasionally? Sent from my iPhone using Tapatalk

My fuel lines are brand new from fuzzytoaster so I trust them to be good. The truck has been garage kept, so bugs is not as likely but I will pull the cap off and blow through it to see what happens. Thanks for the feedback. Sent from my iPhone using Tapatalk

Can the Cat reader see fuel pressure? The closest friend I have with a scanner is 3 hours away. Do you have a suggestion for one of the cheaper scanners? I have seen a bunch of cheap Chinese versions, but I don’t want to buy until I know which one people are having good luck with. Would love...

Thanks for the suggestion. I am not losing prime at all and the trucks starts pretty easily. I will add this to one of my debugging steps. Sent from my iPhone using Tapatalk

Thanks for the suggestion. I will give this a shot. The truck did run really smooth for about 400+ miles, so this is a new issue. That would make me a little skeptical about lubrication….. but, I don’t think it can hurt. Plus, it may do the truck some good. Sent from my iPhone using Tapatalk

Truck: 1999 m1083 A1 3126 serpentine re-certified in 2009 Symptoms: On start up if left in low idle, the engine surges in a rhythmic way. In high idle I do not notice it. In gear, the truck lunges with each surge. Once the truck is really warmed up (30 minute drive), no more surges. What...