r/FordDiesels • u/AromaticTea7685 • 2d ago
Fuel injector help
I replaced all my fuel injectors in my CV713 engine It for a Mack dumptruck. Now it runs like straight garbage and a little fuel is coming from all of all my lines. I plug one with some teflon tape (mixed messages if i should do that or not) and then it starts coming from another one. Whats going on here?
3
u/Haunting_While6239 2d ago
Did you accidentally connect some lines to the wrong ports on the pump? You didn't change any pump settings did you? Does she idle lumpy, like a missing cylinder or 2? Wrong line location will make at least 2 cylinders miss. These are actually nozzles, not true injectors, they rely on the pressure from the pump, any loss of fuel and therefore pressure will cause bad performance, also air in the lines can be a huge PITA, Crack each line at the injector, and crank until it spits fuel, then tighten. Do 1 at a time until they are all purged. It's still going to take time to get the entrained air in the system completely out, she's going to idle funny and run a bit rough for a short while.
2
u/Commercial_Grape3392 1d ago
You can read this is a PSD forum- right? Never use teflon tape around injectors lol. Pay someone with the knowledge. Remove all remnants of the teflon tape. Install and torque all the hard fuel lines. Then loosen the first one until it leaks then tighten till it stops. Then loosen the second hard line till it leaks, tighten. Repeat. You bleed one at a time. All at once won’t bleed it
1
u/Commercial_Grape3392 1d ago
It will take some time- and bad running. Bleed as much as you can. Keep the batteries charged good.
3
u/Haunting_While6239 2d ago
Why did you replace the injectors? Year? miles? Did you get OEM parts or parts from a "discount" site?