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Shuttering @ 45-50mph
Truck has 183,000 miles & it's bone stock.
I jsut added new fuel lines, filter, FPR Shim, no fuel pressure guage. I've been meaing to add it since I shimmed it, but havent had time.
After all this work, I get on the Parkway to go to work and the first time it did it, I thought the shuttering was the bumpy road. Then it kept doing it until I added or removed throttle.
It now does it at 45-50 mph constantly. It SOUNDS like it is running fine, and doesnt seem to have any sort of loss in power; even when I get on it.
I dont remember if my truck shuttered before I shimmed it.
Sounds like fuel delivery, right? Fuel pump?
Thanks in advance for any suggestions or input! Cheers!