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Way OT

F

Farmall 504

Member
Tired, at my wits end, waiting for reply on a Mopar forum, wondering if anyone might be familiar with late model Chryslers. Got a 3.5 throwing a 1004, short runner valve. Will this code cause limp mode? Pulled manifold off and short runner valve barely moves. The only other code is for EGR, for years. A new hunk of plastic manifold is 1200 darned dollars.

Are all the manufacturers using this type of manifold now?

Thanks.
 
Yes. Worried a used one will just have the same problem. Others have reported it at under 100k miles.

Rock doesn't have nor parts geek.

Thanks.
 
The runner valve can get all gummed up with carbon. You might clean and polish it and put a little grease on it. It would also be good to replace the O-Ring in the manifold. If it still doesn't work you might need to replace it.
 
That is a big problem on those engines, the runner doesn't move a lot, maybe 30* of rotation, it's usually sticky or binding to set the code. This code should not cause a limp mode problem. It sounds like your next step is removing the intake and thoroughly cleaning the runners & flaps. Removing the intake is pretty easy to do BTW. The intake manifold is unnecessarily expensive but it comes with a new throttle body and actuators.
 
Yes, I have it off, and it's not just carbon. Apparently over time they develop blisters in the plastic journals. Brake cleaner, carb, and seafoam cannot loosen it. And sometimes the shaft itself gets warped.

Mine has actually gotten worse as I've been cleaning it. Went from very sticky to cannot move by hand and have to put a screwdriver in the shaft to turn it.

Thanks.
 
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