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Discussion Starter #1
I recently purchased a 05 T&C 3.8 with 120k on it. My gas pedal was sticking, I tore apart the TB and it had ALOT of black soot, like my chimney gets in comparison. I cleaned all of it, didn't remove the plenum.It stopped the sticky pedal. 2500 later pedal is sticky again. Took airboot off of TB looks like soot buildup again. Anyone know why this is. My dodge caravan 3.3 with 239k on it was reasonably dirty for the mileage, nothing like this turd I bought.
 

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On the top back of the engine is a PVC valve. Follow the hose. It's AFTER the air intake filter. All of the PVC oily messy blow-by and moisture gets dumped directly into the TB via the intake and into the plenum. Some folks have re-routed this hose placing it before the filter. Others use the old school catch can. Some elect to use just an enclosed large transparent fuel filter just before the hose gets to the air-intake box.

A Plymouth Duster or Dodge Dart 1970 - 1980 era fuel filter is the typical route. Just needs to be replaced once a year or so.

This sludge build-up also diminishes the MPG over time. With the catch can option, the messy sludge and the hot gases do not return to the air-intake dox, thus allowing the better MPG. Outside cool air is best on the intake, not hot gases.
 

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Discussion Starter #4
On the top back of the engine is a PVC valve. Follow the hose. It's AFTER the air intake filter. All of the PVC oily messy blow-by and moisture gets dumped directly into the TB via the intake and into the plenum. Some folks have re-routed this hose placing it before the filter. Others use the old school catch can. Some elect to use just an enclosed large transparent fuel filter just before the hose gets to the air-intake box.

A Plymouth Duster or Dodge Dart 1970 - 1980 era fuel filter is the typical route. Just needs to be replaced once a year or so.

This sludge build-up also diminishes the MPG over time. With the catch can option, the messy sludge and the hot gases do not return to the air-intake dox, thus allowing the better MPG. Outside cool air is best on the intake, not hot gases.
Thanx. Gonna try the filter.
 

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Discussion Starter #5
Thanx. Gonna try the filter.
Do I put the new filter in the front hose going from valve cover to air box?? Also at carid auto parts they sell an old school breather cap for the valve cover. The hose from the pvc valve is short. Is this the hose to add a filter or catch can to? Should I replace the old pvc valve? The owners before me were lazy. They had another radiator for it but instead dumped in 5 cans of that copper Luma-seal crap. I took out a quart jar of gum from the coolant overflow. After cleaning entire system I still see specs of copper. I did put in the rad they gave me with van. No leaks. Just saying didn't know if they had done something that makesTB carbon up so quick.
 

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Drivin' Maniac
2002 Grand Caravan ES 3.8L
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Took airboot off of TB looks like soot buildup again. Anyone know why this is.
Vans that used EGR valves suffered from TB dirt. Unfortunately you cannot just remove the valves without getting a CEL.
 

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Do I put the new filter in the front hose going from valve cover to air box?? Also at carid auto parts they sell an old school breather cap for the valve cover. The hose from the pvc valve is short. Is this the hose to add a filter or catch can to? Should I replace the old pvc valve? The owners before me were lazy. They had another radiator for it but instead dumped in 5 cans of that copper Luma-seal crap. I took out a quart jar of gum from the coolant overflow. After cleaning entire system I still see specs of copper. I did put in the rad they gave me with van. No leaks. Just saying didn't know if they had done something that makes TB carbon up so quick.
Sure, you can use the old school breather cap from a Dodge Ram Van 3.9L/5.2L/5.9L in the late 1990s and early 2000 era. These usually have a good filter media in them too. Between the PVC valve and the air-intake box is best to place it. In an odd setup, folks have filters on each of the hoses from the top of the valve covers. It's a breather system, so the pressure could escape out either hose.
 

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Discussion Starter #8
Sure, you can use the old school breather cap from a Dodge Ram Van 3.9L/5.2L/5.9L in the late 1990s and early 2000 era. These usually have a good filter media in them too. Between the PVC valve and the air-intake box is best to place it. In an odd setup, folks have filters on each of the hoses from the top of the valve covers. It's a breather system, so the pressure could escape out either hose.
So I can put a clear fuel filter on the front hose. The hose to the pvc valve is kinda big. I guess I use a longer hose and add a fuel filter there too. My peddle stuck one day while driving. I took off the TB and cleaned it in gas. Took apart the whole thing, 2000 miles later it's carboned again. WHY DOESN'T MY 01 GC T body get gummed up. 230k miles fairly clean.
 

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WHY DOESN'T MY 01 GC T body get gummed up. 230k miles fairly clean.
As Carbuff2 mentioned, EGR vs non-EGR engine.

For filter method and hose fitting size, the previous posting for the Dodge Ram Van or Ram Truck would be the best bet. Rockauto has them really cheap than most places.
 

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2001 can have EGR also. The 2005 vans seemed to have more of a habit of using oil, so more blow-by is my guess. More oil sucked into plenum makes the EGR gases stickier. Install a catch can in the REAR PCV line between the valve and the plenum inlet, to separate oil from air and keep the sludge out of the intake plenum. The front valve cover only needs a mini air filter breather, so the stock setup is fine. If you want, you can cap the line on the air filter box to delete the long hose, and just run a small intake filter/breather on the front valve cover.
 
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