I run the fuel injection service at my shop daily... the results are amazing. We use a Motorvac machine to clean the injectors/fuel rail, and we also clean the upper plenum with a mist of the same solvent. We usually see 1-3 inches of vacumn increase at idle. As far as the EGR goes, during the upper plenum cleaning (engine is running) we cycle the EGR open, with rpm at about 1300-1500. Which usually helps clean out the passages. Of course if it is plugged, it wont help, and removing is required. Seafoam is a good product, but as with all the cleaners out there, they are for preventive measures. We have customers that swear by it. We had a guy (1995 F-150 5.0) come in with a miss, and loss of power, he just tuned it up (cap, rotor, the works), and the problem was still there. We ran the truck on our Sun 500, which among other things will drop spark to each cylinder, and measure the HC change. The results showed that only two of the eight injectors were normal, one wasnt flowing at all, and the others were all over the board. He said he uses Seafoam regularly, and didnt believe us. Long story short... he replaced all of the injectors himself, and problem solved. He had us Motorvac his wifes car shortly after that. Im sure we could of got most of his injectors flowing correctly with the Motorvac, but questionable on the one that was the worse. I Motorvac my Sport Trac and wifes Concorde every 30k, and my new Supercrew only has 3k.... so it will be awhile on that one.

 

how exactly is all this done? How do hook up this machine? Maybe i should stop by my ford dealer and ask about this cleaning. Not sure if i need it though. tb is spotless and i put in a bottle of lucas fuel treatment every 6000k.

 

I will definitely go with the Gatorback. The 26" packs are barely audible in the cab and wake up nicely when you get on it. Much different outside the cab and sound great. (The only time I get to hear it from the outside is if the wife takes it out of the driveway on RARE occasions.)

The biggest difference I found was in throttle response. Had them done without the "H" pipe first, and lost a ton of lowend. I wouldn't do it if you're looking for a mileage increase.

 

What happened the the coated injectors the majors were using in the late 90's. Many tech articles about not using harsh cleaners on injectors because they were coated and the cleaning would damage them.. Obviously many have cleaned injectors ( have run the Motorvac machine on hundreds in my day) and haven't had any come back but still have to wonder. Anyone out there heard anything about this??


97f150f/s.... Tha e machine is simple. It has a small tank where you put the cleaner. Has two hoses with quick connects. You disable the fuel pump. Attach pressure hose to fuel rail. return hose to the obvious. Start the machine then the truck. Let it run till it runs out of fuel/cleaner. Put everything back and away you go. the Champion aerosol product is also a viable alternative ( most fuel injection machines cost $2500 or so)

 

Motorvac machine hooks into the fuel lines, pressure and return. Then the lines from the tank are looped together, so the fuel goes right back to the tank. The machine acts like your fuel pump, pressurising the system. The vehicle is run for an hour or so.