Exhaust Problem: GLOWING RED HOT - Maintenance and Repair Forum

Forum Post / Reply
You must log in before you can post or reply to messages.
Exhaust Problem: GLOWING RED HOT
Tuesday, December 06, 2005 9:31 AM
I have DC sport, 4-1 headers that are nylon taped, and a borla cat-back system installed on my car. I got in this cold morning and started it up, and it was at a really rough idle. It seemed to smooth a bit out at high rpms. It's really rough and lacking power in the low RPMS. I got out of the car after driving it for 10 mins locally, and looked under the car, only to notice from the back of the Cat, right up to the start of the muffler, it was glowing red hot. The headers and downpipe were fine, but it started at the very end of the cat. I have no idea, only to think it's a clogged cat because it's sputtering and and has a really rough idle. Keep in mind it's 30 degrees out here, and it still managed to glow red hot. Any input would be helpful guys.

Re: Exhaust Problem: GLOWING RED HOT
Tuesday, December 06, 2005 10:13 AM
Well it may or may be the cat. It could be clogged and thats causeing it OR it could be you have too much fuel getting into the engine and the poor cat is working overtime trying to burn off the excess fuel and thats causeing the glow. Is the CEL on? if so get the codes checked before you just start replaceing parts as that tends to get expensive. If there is any codes see what they are.




Semper Fi SAINT. May you rest in peace.



Re: Exhaust Problem: GLOWING RED HOT
Tuesday, December 06, 2005 11:17 AM
It might help to know what car you have, with what engine.



Re: Exhaust Problem: GLOWING RED HOT
Tuesday, December 06, 2005 11:58 AM
Clogged cat my friend. Those are the classic signs of it.


Brian
Re: Exhaust Problem: GLOWING RED HOT
Tuesday, December 06, 2005 6:23 PM
Yeah, and wrapped header doesnt help IIRC, doesnt it make it hotter too, or isnt that the idea?


Re: Exhaust Problem: GLOWING RED HOT
Tuesday, December 06, 2005 8:57 PM
id actually be looking at a the muffler


usually the cat will cause the pipes to heat up before it , not after


if you havent noticed anything before that morning someone might have shoved something up the tail pipe


or the cat did come apart , and clogged the muffler


also wraping the header is not good for a street car, it will cause the header to fail , and blow out


id pull the cat back pipe off and start it and see how the motor acts , and also if there is a white sandy grit in the pipes , which would be the cat coming apart










Re: Exhaust Problem: GLOWING RED HOT
Tuesday, December 06, 2005 9:09 PM
[quote=97cavie24ls(JDM&00s/c sedans™)]id actually be looking at a the muffler

usually the cat will cause the pipes to heat up before it , not after

if you havent noticed anything before that morning someone might have shoved something up the tail pipe

or the cat did come apart , and clogged the muffler

also wraping the header is not good for a street car, it will cause the header to fail , and blow out

id pull the cat back pipe off and start it and see how the motor acts , and also if there is a white sandy grit in the pipes , which would be the cat coming apart
<img src="http://home.att.net/~lls4849/iagree.gif">
IMO, this is good advice.


Re: Exhaust Problem: GLOWING RED HOT
Wednesday, December 07, 2005 5:05 AM
Thanks for the help guys. I finally got an engine code to read. haha, says "multiple cylinder misfires". SO i'm thinking spark plugs or my coils. I'll take em out tonight and see if they spark or not. I've heard from people that the bosch platinums might be the source of the problems. I've sworn by them in the past, but now i'm questioning myself. I'm going back to the stock AC/delco if they are. Thanks again...
Re: Exhaust Problem: GLOWING RED HOT
Wednesday, December 07, 2005 5:44 AM
So the engine was mis-fireing causeing unburned fuel to dump into the cat. Hmm?
Sounds almost like what I said.

Glad you found it out before it made your cat go bad.




Semper Fi SAINT. May you rest in peace.



Re: Exhaust Problem: GLOWING RED HOT
Wednesday, December 07, 2005 5:07 PM
[quote=97cavie24ls(JDM&00s/c sedans™)]id actually be looking at a the muffler


usually the cat will cause the pipes to heat up before it , not after


if you havent noticed anything before that morning someone might have shoved something up the tail pipe


or the cat did come apart , and clogged the mufflerquote]

my thoughts too. another thing that can cause it is an EXTREME lean condition

here's an off beat thought too. there is such a thing as a Field Service mode, this is done by connecting two pins in the DLC 9dant remember wich two) and it will set EVERYTHING to base (timing:spark/ign, and will basically ignore ALL sensors not needed for engine to be running. what this will cuase many times is the exhaust to glow red hot b/c it causes certain conditions (i.e extreme lean condition) maybe somethign shorted out. very implausable, but possible, and just sum food for thought



Re: Bad ignition coil/ control module
Tuesday, December 13, 2005 4:34 AM
As a heads up, i finally got time to work on my car this past weekend. I found out that plugs 2 and 3 aren't firing, 1 and 4 are working correctly. So i took my Iginition coil, and started to ohm out the pins, thinking i could find something, but i have no idea what i'd be looking for to prove it bad.. The ignition control module could also be bad. I'm not sure what i can do to find which one is bad. I'm going home for the christmas in 3 days, and i have to fix this for the road trip. Thanks for any input on which one to pick.

Re: Bad ignition coil/ control module
Tuesday, December 13, 2005 5:35 AM
Tom, If you go to Advance Auto they have in their computer system the specs for all the coils as to what the ohm values should be and the exceptable levels that the manufacturer says are ok. They also have a tester for certain moduals, you'll need to pull it off and take it into the store for testing, same with the coils. Now true some moduals can't be tested but if I remember correctly the Chevy ones aren't a big deal.
call and check before you go so they can double check that they can test yours.

And good luck




Semper Fi SAINT. May you rest in peace.



Re: Bad ignition coil/ control module
Tuesday, December 13, 2005 3:05 PM
it probably is the module, had the same problem with my company car. we put an aftermarket module on and it was running like crap. we decided to put an a.c delco on and it solved the problem

BirdmanXXXXX!
Forum Post / Reply
You must log in before you can post or reply to messages.

 

Start New Topic Advanced Search