The Diesel-Doctor strikes again...

[snailexpress]

And most tuners came out of "Cummins certified" shop.
One my friend i did help him with MM almost decade ago call me to re flash ECM. I asked what happens.
His engine stall on the road and was towed to "Cummins certified shop" Mechanic did diagnostic and found camshaft speed sensor faulty. Replaced sensor. Still no signal. Advised to replace ECM but declined to work on tuned truck until all EPA systems restored .
When I came to check what is wrong found sensor wasn't installed properly deep, O-ring was jammed. Reinstalled sensor and engine fires up. Wiggled sensor plug and signal went intermittent. Disassembled plug and fixed contacts. That all.
Shop charged my friend almost 2 grands for nothing.
BTW friend truck running version MM I believe H or J without any problems.