Engine started surging coming home and then died.

[Kenneth Cole]

Hi
I posted this problem before and the responses didn't help. Still thanks for the help. Anyway I unhooked the fuel line coming out of the fuel filter and fuel is coming out. One question I have is should it be a steady stream or a pulsing one? Also someone said to check the automatic fuel shutoff . Can someone tell me where this is and how to test it? Also how can I check if fuel is making it to the cylinders?

Thanks for the help.
Ken

 

[Coug]

can check fuel to the cylinders by loosening (but not removing) one of the hard lines to the injectors. If it starts weeping fuel when it's cranking, you can pretty much eliminate the fuel system as the likely issue (unless most of the injectors suddenly failed somehow, which is pretty unlikely but not impossible)

 

[Kenneth Cole]

OK , I opened up one of the injector lines at the cylinder and it leaked fuel as I cranked her over.
Any ideas what I can try next?
Ken

 

[Coug]

When it was surging/dying, did you see any color to the exhaust smoke?
When you are cranking it over can you see any smoke out the exhaust?
How does the air filter restriction gauge look?

 

[Kenneth Cole]

When it was surging/dying, did you see any color to the exhaust smoke?
When you are cranking it over can you see any smoke out the exhaust?

When it was surging/dying, did you see any color to the exhaust smoke?
When you are cranking it over can you see any smoke out the exhaust?
How does the air filter restriction gauge look?

How does the air filter restriction gauge look?

 

[Kenneth Cole]

Coug
I checked the filter gage and it is at the bottom. Also there is no smoke coming out of the exhaust.

Ken

 

[Action]

How old is the fuel in the tank?

 

[TNDRIVER]

Coug
I checked the filter gage and it is at the bottom. Also there is no smoke coming out of the exhaust.

Ken

Do not trust the gauge. Open it up and have a look see. Same for the fuel filter. A small amount of fuel out the hose when cranking does not mean the filter is good. If you have not changed/remover the filter now is the time to do so. Eliminate the choke points one at a time. I think you may be surprised at what you find in the fuel. Good luck and be sure and post you fix after its running.

 

[MilitarySurplusBrent]

If you have never changed the fuel filter, I'd do it just so you know it's done. Could be something as simple as that.

 

[MilitarySurplusBrent]

OH and make sure your fuel don't have any green slime / residue. If so, the fuel might be bad and you have to put an additive in your tank to get rid of that green crap.

 

[Kenneth Cole]

Hi
Ok, I checked the air filter and it was fine. I Unhooked both the input and output on the fuel filter lines and fuel is coming out real good. I unhooked one of the injector lines at the cylinder and fuel does weep out of the line. I just don't know how much should be coming out.
Any thoughts as to what to do next. All of these tests are while cranking over the engine.
Ken

 

[TNDRIVER]

Hi
Ok, I checked the air filter and it was fine. I Unhooked both the input and output on the fuel filter lines and fuel is coming out real good. I unhooked one of the injector lines at the cylinder and fuel does weep out of the line. I just don't know how much should be coming out.
Any thoughts as to what to do next. All of these tests are while cranking over the engine.
Ken

I believe you need to 'remove' the filter housing and clean and replace the filter...... remove two hoses, 2 bolts to the fire wall, three bolts on the top, see whats inside. My two cents. When cranking you should get a decent spurt of fuel up from the pump as the engine turns over. Just my two cents.

 

[Kenneth Cole]

Hi
I had changed the fuel filter last year and as much fuel is coming out of the line from the fuel pump going into the filter as is coming out of the filter so I think the filter is fine.
Ken

 

[TNDRIVER]

Hi
I had changed the fuel filter last year and as much fuel is coming out of the line from the fuel pump going into the filter as is coming out of the filter so I think the filter is fine.
Ken

If you have the panel in the floor to get to the fuel sender you might want to have a look in the tank also. ( By the way there is one bolt on the front of the fuel filter to take off, getting it back on is not so easy. I turned mine around and tacked the bolt to the bracket.) Your description sounds like fuel starvation is the reason everyone is chasing those points, myself included. There is a sock in the tank that can clog. It also has a bypass in the end that had rusted up on one of my trucks. I believe there is a screen in the pump itself where the fuel enters the pump, at least it's in the parts diagram. When I have replaced pumps as soon as you get fuel to the injector I could close them off and get it cranked. Electrical power to the shut off in the pump, but your didn't die instantly.....PUMP DIED....had that happen, also in the driveway. Stuck open slightly, stopped it with the brake, shifted into neutral it revved up slightly and when I blipped the throttle it died not to restart. The pump had about 150 miles and 18 or 19 years on it. (Never been thru Wapiti looks like you're in a nice place but not to get a pump rebuilt) Good luck!

 

[Kenneth Cole]

Hi
When I remove one of the injector lines to an injector and crank the engine over, how much fuel should be coming out of the line?
Ken

 

[Milcommoguy]

Not much. Wrap a paper towel around it and crank 20 seconds. Wait a minute and crank again. It should be wet, not sopping wet, but not dry either. (scientific measuring method)

All done... could squeeze wring out a few drops. Don't get the big idea to hold your finger on it, checking for pressure.

Somethings you just don't do, CAMO

 

[Kenneth Cole]

OK
She started for me and I let it run for a couple minutes. Came back 20 minutes later and she started but started to serge and then killed. I did this a couple more times with the same results.
Ken

 

[Action]

Open the fuel filler cap and start it. See how it does with the cap left open.

 

[Kenneth Cole]

Hi
I guess I used a wrong word. Instead of serge I should say That the engine RPM is going up and down and then it kills.
Ken

 

[Glider]

I think it is a fuel problem. Check the hoses at fuel tank. I just had an experience of a 998 acting very erratic very similar to your experience. Turns out it was a loose fuel line connection to tank. When running it would suck air along with fuel and send it all through the injection pump making it run erratic and act possessed. After tightening hose it settled down and runs fine now. To be clear, it was so bad the owner thought the engine was going to need replacememt.