i cleaned out my cat yesterday after puttin on my dc header and today i threw a check engine light.. which didnt surprize me.. but is there anyway to keep it from coming back? besides the obvious buy another cat or high flow? i already pulled the negitive off the battery

 

obd1

 

is it a 4 wire o2 sensor??

if so, o2 simulator. see o2 sim install thread in my sig below for a place to buy($30) and how to install

 

a hollowed out cat will only hurt performance. And theres no reason not to run a cat. Get a high flow cat or at least a "test pipe"

And OBD1

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DagYo! &raquo;</TD></TR><TR><TD CLASS="quote">obd1 </TD></TR></TABLE>

Heh, that's a good one.

Indeed, with an OBD2+ vehicle, doing something like that will grab a CEL. Do like the others stated, O2 simulator and/or test pipe.

 

i assumed hollowing out the cat was basically the same thing as putting a test pipe on ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jayare05 &raquo;</TD></TR><TR><TD CLASS="quote">i assumed hollowing out the cat was basically the same thing as putting a test pipe on ?</TD></TR></TABLE>

I thought the same thing. I mean, wouldnt a hollowed cat be just like a pipe, but with the looks of a cat? Cuz if I run a test pipe and a cop decides to do a random look under the hood and under the car, hes gonna noticed no cat. *shrug*

 

well you need a cat for the visual part of inspection too in PA. will my car pass edmissions with this obd2? because what i had planned on doing is going to a part store when it is time for inspection and just buy a cat and throw it on, then when i pass i planned on taking the cat back..

 

hollowed out my cat on my em1 and got a ecg 02 sim from kteller.com and it works flawlessly i would definitely recomend it for your prob. some of those solder in resistors dont always work this does.
peace
eric

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by urnotfast &raquo;</TD></TR><TR><TD CLASS="quote">hollowed out my cat on my em1 and got a ecg 02 sim from kteller.com and it works flawlessly i would definitely recomend it for your prob. some of those solder in resistors dont always work this does.
peace
eric</TD></TR></TABLE>