running lean?

[shopro88]

I just had the catylitic converter gutted on my jetta ecodiesel. It runs ALOT better, maybe too good. It runs a little bit warmer, and since it is td motor with a NA pump  I was thinking it might be leaning for some reason. could gutting the cat on my eco lean it out?

[theman53]

no
The way I understand a diesel takes in 100% of cylinder volume per stroke. It maybe breathing better, but the more air you get in and out faster it should run cooler. The hot part is when you turn up the fuel.

[the caveman]

no
The way I understand a diesel takes in 100% of cylinder volume per stroke. It maybe breathing better, but the more air you get in and out faster it should run cooler. The hot part is when you turn up the fuel.

well, not "no". you are both saying the same thing.

[79rabbit4dr]

I think "theman53" was answering "shopro88's" question, not refuting "libbybapa's" post  

[theman53]

yeah Libbybapa posted sooner than I did, but it looks like we basically were righting at the same time. Andrew just must be a faster typer than me  :lol:

[arb]

I just had the catylitic converter gutted on my jetta ecodiesel. It runs ALOT better, maybe too good. It runs a little bit warmer, and since it is td motor with a NA pump  I was thinking it might be leaning for some reason. could gutting the cat on my eco lean it out?

Like they all said, a diesel is always lean - we control power (aside from boost on some engines) by controlling how much fuel is injected... so, less fuel, less power. If your Cat is plugged, you'll have excessive back pressure which means less clean air in each combustion cycle, so less power and less heat because there is not as much air to burn the fuel.

[88jetta350]

I just had the catylitic converter gutted on my jetta ecodiesel.

Why didn't you just replace it?

[dillenger1]

I just had the catylitic converter gutted on my jetta ecodiesel.

Why didn't you just replace it?

replace it?

[8v-of-fury]

I just had the catylitic converter gutted on my jetta ecodiesel.

Why didn't you just replace it?

replace it?

Why not take it off completely?

[Smokey Eddy]

HA!
my pops said today "how much would an exhaust system cost for your car? because we just want it out of the garage."

"Well, because i need a downpipe to be fabricated to fit because of the blend of two different sized engines and i want it to be three inch exhaust... probably $1,000 for a shop and like ... $150 if i did it my self + beers and SS wire because i already have some three inch pipe, oh and probably a weekend... and i wouldnt get a catalytic converter or a muffler"
(he seemed to think those two items were vital)
"oh..."

For air care im just going to get two adapters that will replace a piece of my straight pipe with the old cat for air care purposes only Muffler isn't required.

[shopro88]

thanks guys. It dose run alot better now. I had my buddy took its temp and it was around 190F. It might need a sending unit, It runs on the second to last line (3/4) I would call it.

[Rabbit TD]

I just had the catylitic converter gutted on my jetta ecodiesel. It runs ALOT better, maybe too good. It runs a little bit warmer, and since it is td motor with a NA pump  I was thinking it might be leaning for some reason. could gutting the cat on my eco lean it out?

Like they all said, a diesel is always lean - we control power (aside from boost on some engines) by controlling how much fuel is injected... so, less fuel, less power. If your Cat is plugged, you'll have excessive back pressure which means less clean air in each combustion cycle, so less power and less heat because there is not as much air to burn the fuel.

This might sound dumb but I didn't know these 1.6's even had catalytic converters, I didn't think diesel would work with a catalytic converter and just kill the workings of it :oops: All mine have just had a resonator and a muffler :shock:

[spencebm]

cats suck and all they do is get plugged up with soot and then do no good but add weight, DON'T DO IT

[dillenger1]

why did you put the cat back in?

[shopro88]

It was easier just to gut the cat then to bend pipe in its place.