3406e shutter missing

Did you find anything with the shutters? I'm having the same issue. I have the 800 hp cam and c18 injectors in a 1LW. Mine only acts up when cold. When it's 80 deg or better outside it don't act up, but when it's cold, it's bad, and gets worse the colder it gets, and only when loaded. I changed all sensors, and both cab and engine to ecm harness. When I first put in the bigger injectors it ran fine no Sutter, then a few months later it out of the blue started suttering. It happens 1300 to 1600. It seems like a timing issue to me but I've changed numerous cam sensors and calibrated the timing as well. I have 105psi fuel press at idle, but never checked for air in the lines. It also happens between 25-35psi boost, if u back off or give it more boost it goes away.

 

I’m new to the forms and I’m not sure where to go for my problems. I have a 1999 kw T800 heavy spec truck, 1998 1LW cat 3406e and it’s has been nothing but a problem. Now my Bottom injector o-rings keep burning up. Fuel in oil, no coolant in oil, no fuel in coolant. All 6 lower injector o-rings burned away in under 50 miles. I had a platinum rebuild done 30k miles ago. Every fuel line, and ever part that has anything to do with the fuel system is new. Housings, pump, fuel cooler, pressure valve, hoses, all engine sensors, I mean everything. Well Except wire harness. Fuel pressure at idle is 100 psi and gradually gets as high as 140psi at wide open throttle. Turbo temp is low like 300-900 at peak, coolant temp never above 210. I have dumped at least 50k into this POS truck. Factory Peterbilt and cat specialist are s helping me with this truck. He is even stumped. Truck starts right up, but vibrates under a load. It pings and cylinders are definitely miss firing. We install new orings and it runs good for about 50 miles. Burns up a o ring and the cycle begins again. I can’t afford to spend any more money. This is my last ditch effort any direction or help is appreciated

 

If its burning the o-rings I would think the copper washers are missing or not sealing in the injector cups like they should so thats where I would look.

 

Are you talking bout the small o-ring that slips on injector tip? If so they will burn off and get replaced with carbon buildup. That's normal. But if you have heat discoloration up on the plunger barrel then you seats are bad. ( where the tip seats down in) if the second o-ring is burning then you have bad seats. Two ways to fix it. Pull head and have machine shop repair them. Or find some one who can do it in truck. There use to be a guy in the repair thread that would come to you and recur them in truck. Think he went by truck machinist. I'm betting if you got a reman head from cat they was not cut properly.

 

Here is a picture of my injectors. I have a terrible vibration unload, sounds like a fuel knock, ruff low rpm sputter, idles fine, low exhaust temps when acting up. The motor even after I frame just never felt like my other 550 3406e. O a back story. The truck crack number 1 injector after owning it for a month. That’s why I install platinum kit. I at this point have replaced just about everything. Could the wiring cause these problems? The truck started to run weak about 2k milage ago

 

Cooper washers? Huh didn’t notice them. I’ll look into that.

 

Last engine I tore into was a cummins and they have copper washers and I cant remember if the cats have them or not but after superhauler’s comment Im thinking they dont. Been 10 years since Ive had a cat apart.

 

I’ve talk to cat, have a Peterbilt cat specialist look at it and everyone is stumped. I don’t have all the symptoms that a bad injector cup makes, the truck fires right up, and Ben in cool weather, doesn’t over heat, each cylinder is at cool temp at each exhaust port, idles is fine, but once your making boost the truck is extremely ruff, low power, low exhaust temps, crappy fuel mileage, and almost has a fuel knock. Cut out test doesn’t show anything wrong. The wiring in this truck is terrible, the only internal part I have replace is injector harness. Can a trump ecm cause this? I have loads coming up and just can afford to pay cat 500-1000 go Dyno time. I was hoping some one has seen this problem

 

If my seats are bad shouldn’t cat warranty the head? It’s brand new only 30k miles on everything... or is it my fault? What causes the seats to go bad. Reason I’m asking is I’m tired or throwing money at it, but never really fixing the original cause, to have the same problem over and iver

 

Theres no copper washers.

The injector seats on the steel taper in the head.

Your seats In the head are warped.
You will never fix it until you have the seats machined in the head.

There was a guy on here . Truck engine machinist. He can do the seats without taking head off. It's either this or replacing the head under warrenty with another reman.

You will continue burning up the lower O-rings on your injectors till you fix this.
Combustion gas's are getting by the seats and getting past the o-ring putting air into your fuel rail making it run ruff.