The Diesel Stop banner

1 - 3 of 3 Posts

·
Registered
Joined
·
2 Posts
Discussion Starter #1
Hello all hope everyone had a happy Easter.
Now on to the matter at hand. I am in desperate need of some help, advise, input, what ever it takes.....PLEASE. I have a 2000 F250 7.3. Here is the skinny. 2 weeks ago I had a fuel leak at the fuel/water separator valve so I decided to do a little TLC and replace the valve, fuel filter, and serpentine belt. So removed leaking valve then removed fuel filter. Fuel filter hadn't been replaced in awhile and was fairly difficult to remove. After removal, filter housing was pretty dirty so I removed fuel heater element and proceeded to clean housing with a brush and brake clean. After a pretty thorough cleaning there was a slight dirt grove where the outer o-ring on the filter was so I took a piece of emery cloth and sanded it clean. Put everything back together. Started right up. I did forget to cycle ignition 3 or 4 times but like I said it idled fine. After I inspected old serpentine belt to make sure it was tracking properly about 15 minutes I shut the truck off. I replaced the belt and started truck back up. Still idled fine no smoke no ruff idle and now no sequel from the belt. Shut truck down after about an hour when to take truck to store for road test. Truck started fine, idled fine, but now when throttle is pushed it falls flat on its face and smokes real bad. It will idle and smoke a little but starts to lope at 1,000 rpms and smokes bad and won't go over 1200 rpms. So I end up purchasing a filter housing rebuild kit and a new FPR valve from Dieselorings.com. Rebuilt everything and still the same problem. I installed a schrader valve on the back drivers side of the filter housing. My fuel pressure is 73 and drops to 71 and when I press the throttle is drops to 70. It doesn't have any codes.Also I pulled the connector off the ICP, connector is dry (no oil), started truck and check engine light came on. Plugged back in light went out. Did the same with map censer. Same happened. Checked connector on IPR looked good, cleaned and reconnected. I did not try to star truck with IPR disconnected. No oil or fuel in valley. Any help will be greatly appreciated.....Thank you in advance.
 

·
Super Moderator
Joined
·
26,296 Posts
Unless you fully flushed out the filter housing you may have introduced some debris into the injectors (not clear whether you did the emery cloth thing with the filter housing off the engine or not).
When you disconnected the MAP sensor, it might not have made good contact on reconnecting, and without a good MAP signal, the computer restricts fuel to the engine.
Too many variables to really be definitive. What color is the smoke? If it's white, that's a sign of insufficient fuel.
You said there weren't any codes. What did you use to read them? Generic scan tools won't pull any up on your diesel and unless you cleared the codes after disconnecting connectors and getting the check engine light, there WILL be codes.
 

·
Registered
Joined
·
2 Posts
Discussion Starter #3
I did the emery cloth with the filter housing on the truck but the fuel/water separator valve was off. It was flushed out very well prior to replacing the filter and valve. The MAP sensor was unplugged yesterday and the light check engine light went out. There was no change in the way the truck is currently running. Smoke is white and doesn't smell like really anything. The engine was scanned with a laptop with ford software. The guy that looked at it and scanned it was a Diesel tech apprentice who worked at a ford dealer. He took pics of the multiple screens and talked to the person he is working under and couldn't come up with an answer. Injector buzz test passed, cyl. contribution test passed, cyl. temps were all good.
 
1 - 3 of 3 Posts
Top