surging

[Hart]

1992 club cab 135000 miles -16mm -screw 1/2 turn in. Picked up some fuel with rusty looking junk in it. My truck started surging when there is no load on the engine. Dumped the fuel ,added new fuel and filterpluse some C- Taine booster-fuel injector cleaner also. Better but still serging some. A shop in the San Fernando Vally said I needed my injector pump rebuilt and new injectors. Estimated $$$$ 2000. 00 Any thoughts?

 

[BushWakr - RIP]

First, suck it up cause you're going to need to do some work...



DO THIS ON A COLD ENGINE...



I think you should purge the entire system. Undo the fuel lines at the injectors, and then at the pump... let them drain free. . if you have some compressed air, use a small nozzle to push from the injector back AFTER the lines are off at the pump.

What you want to do is get out as much of the fuel from every line etc as possible.

Get two new filters and after your system is purged as best you can, fill the filter with some CLEAN fuel and additive (half and half).

Re-attach your fuel lines at the pump.

Loosen the low pressure fitting on the side of the engine and work the lift pump lever till you drop or... until you have fuel coming from it then tighten it.

((If you feel no resistance when operating the pump lever, use a ratchet/socket to turn the alternator BACKWARDS... . this will move the lobe that the lift pump runs on and you should eventually find a spot were the lift pump handle works. ))



Connect a battery charger to the battery and try cranking the engine over... . no more than 10 or 15 seconds at a time with a 15 minute wait after about the 3rd try. (Starter heats up pretty good)

After some cranking you should see fuel coming from the injector lines at the injectors.

Tighten the lines, and crank again. If you see white smoke from the tailpipe you are getting fuel to the injectors.

After a few tries, you should have a start condition.

If it is rough and doesn't smooth out after a moment or so, then crack loose each injector line in sequence till the fuel comes out with a good squirt and no bubbles. Go down the line doing each, and back again if needed.

It should smooth out.

As a final touch, shut down, remove the fuel filter, refill the new one with half/half and tighten up.

Re-start the truck and see if that helps... .

If not, you've spent minimal $$$ and may need to go to the "pro's".

If it runs ok, you're ahead of the game by $1950. 00



Anything I missed or misquoted here guys????????



bob