Truck came to shop with customer saying our injectors are bad. Didn't have much time to play with the truck at the end of the day but did a quick look. codes- p0263, cyl 1 Cont or balance

- some egr code, position

- p1000

Did a balance test, saw a lot of random low numbers but 1 and 3 were -50 ish. Did injector disable test and no change in sound or rpm on 1&3. Buzz text good. Wiggle wiring and ficm/ injector connector. Ficm voltage 48, 47/47.5v under heavy load ( takes forever to get to 50kph)

Cleaned egr, ramped up egr duty and truck sounded like it idled fine ( maybe due to exhaust drowning out engine?)

Past history-- 8 months ago customer bought truck,needed all new injectors.. My first injector job on a ford. Well improper torque on #1 injector and hyro locked motor. Replace seals and washer/oil and truck ran mint.

Any good test to check first? Doing a compression test, fuel pressure in the am..

thanks in advance.

Felice Meo
Owner
Tractor Trailer Service
Thunder Bay, Ontario, Canada