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| to cat or not to cat? http://www.ladsm.com/forum/viewtopic.php?f=26&t=13582 |
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| Author: | Hezig [ Wed Nov 09, 2011 6:33 pm ] |
| Post subject: | to cat or not to cat? |
so, when I got the car, it reaked of cigarrete smell, so much that I didn't even notice the smell off the exhaust. Well not the smell of cigarrete is barely noticeable. And the exhaust smells like shit now, so I wanna put in a cat. ilooked around and I found some hi-flow but I also read that they don't have the filter, so they don't do much. Then I found some universal ones. Which one should I put? My goals are somewhere between 300-350fwhp as I want it to be a DD and somewhat reliable, so would a cat hurt my numbers to much? Thanks |
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| Author: | Synthetek [ Wed Nov 09, 2011 7:14 pm ] |
| Post subject: | Re: to cat or not to cat? |
Are you sure you dont just have exhaust leaks or maybe your car is running rich or burning oil? I usually dont run a cat but when I do I dont notice any difference. |
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| Author: | Hezig [ Wed Nov 09, 2011 7:49 pm ] |
| Post subject: | Re: to cat or not to cat? |
Ill have to check tomorrow, ill take a video and post it. I didn't. See what color the smoke was cuz of my tint, I just saw smoke. White is oil burning right? And black is rich. and if I'm running rich what can I do? Dsm link? |
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| Author: | Wally [ Wed Nov 09, 2011 9:21 pm ] |
| Post subject: | Re: to cat or not to cat? |
Naw white usually means burning coolant. You might have a bad 02 sensor causing you to run rich or a boost leak somewhere. |
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| Author: | Hezig [ Wed Nov 09, 2011 11:28 pm ] |
| Post subject: | Re: to cat or not to cat? |
I do have a boost leak. And I had to go buy stuff so I decided to take the car, and I took a whiff at the exhaust, I picked up a sweet smell, so I'm looking at a boost leak test to find the leaks, and a HG replacement? |
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| Author: | Illeagle [ Sat Nov 12, 2011 9:48 pm ] |
| Post subject: | Re: to cat or not to cat? |
if your head gasket is blown enough to burn coolant, your car would be overheating pretty bad and coolant will keep dissapearing. |
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| Author: | BoostCreep [ Wed Nov 16, 2011 12:34 pm ] |
| Post subject: | Re: to cat or not to cat? |
Are you saying the exhaust smells bad when you sniff the muffler, or it smells bad from inside the car? If it smells bad inside the car, a cat won't fix that. You probably had a leak at the exhaust manifold or turbo/downpipe area. Work on fixing any exhaust leaks first. If it smells bad/sweet when you sniff the muffler, it sounds like there is a bigger problem. A boost leak wouldn't make it smell bad. In fact I rather like the smell of a rich 4G63. You are probably burning oil or coolant. blue smoke = oil white smoke = coolant black smoke = fuel You don't need DSMlink to stop running rich. If you are running so rich that it's causing a problem, there is something wrong. Your injectors flow too much for your setup, or you have an upgraded fuel pump that is overrunning your fpr, or you have some sensors/ECU that are not working properly, etc. Troubleshoot before modding the car to fix a problem. |
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| Author: | Hezig [ Wed Nov 16, 2011 3:34 pm ] |
| Post subject: | Re: to cat or not to cat? |
| Author: | Hezig [ Fri Nov 18, 2011 2:47 am ] |
| Post subject: | Re: to cat or not to cat? |
Put in the O2 sensor (put a post on the nondsm about it) , black smoke seems to be gone have to check in the morning though. Still gotta get to those boost leaks though. Thanks for your help guys! |
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| Author: | dsmchevyguy [ Wed Nov 30, 2011 11:41 pm ] |
| Post subject: | Re: to cat or not to cat? |
ya i had a head gasket problem that ain't it, i been driving your car around these past couple days cause mines down but its running smooth a lil odd on the idle though |
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| Author: | Hezig [ Wed Nov 30, 2011 11:57 pm ] |
| Post subject: | Re: to cat or not to cat? |
Yeah I noticed it right before I left. When I was waiting on the light to the freeway. |
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