General Rotary Tech Support Use this forum for tech questions not specific to a certain model year

Exhaust bright red hot after a short drive

Old 03-27-19, 02:48 PM
  #1  
Junior Member
Thread Starter
 
Join Date: Feb 2005
Location: Maryland
Posts: 30
Likes: 0
Received 0 Likes on 0 Posts
MD Exhaust bright red hot after a short drive

I have a 1985 RX7 12A (GSL) stock with manual transmission. I been have problems with it loosing power after it warm up. Today, I test drove it for about 10 minutes and after the test drive I notice the exhaust system after the exhaust manifold was bright red hot at 11:00 AM in the morning. What could cause the exhaust to heat up like this? .
DiamJim is offline  
Old 03-27-19, 03:15 PM
  #2  
Rotary Freak
iTrader: (7)
 
Join Date: Mar 2002
Location: St. Louis
Posts: 1,591
Received 3 Likes on 2 Posts
Had a bad lower intake manifold gasket that caused a high idle as well as a glowing red exhaust manifold.
books is offline  
Old 03-27-19, 03:27 PM
  #3  
half ass 2 or whole ass 1
iTrader: (110)
 
cr-rex's Avatar
 
Join Date: Nov 2011
Location: okinawa to tampa
Posts: 1,971
Received 65 Likes on 59 Posts
i had the same thing happen on my fd and it ended up being a broken spark plug. the shell of the plug was broken. it was hard to diagnose since the plugs were brand new and it drove perfectly fine otherwise
cr-rex is offline  
Old 03-27-19, 07:16 PM
  #4  
Rotary Freak
iTrader: (7)
 
Join Date: Mar 2002
Location: St. Louis
Posts: 1,591
Received 3 Likes on 2 Posts
Guess....clogged cat
books is offline  
Old 03-28-19, 08:59 PM
  #5  
Junior Member
Thread Starter
 
Join Date: Feb 2005
Location: Maryland
Posts: 30
Likes: 0
Received 0 Likes on 0 Posts
Can I delete the Cat and two Pre-Cats? Will the car run ok?
DiamJim is offline  
Old 04-01-19, 11:44 AM
  #6  
Junior Member
 
Join Date: Oct 2015
Location: Tampa
Posts: 30
Received 2 Likes on 2 Posts
Try advancing the timing and see if it goes away.
strokercharged95gt is offline  
Old 04-01-19, 12:33 PM
  #7  
Fight the Cancer
iTrader: (42)
 
Molotovman's Avatar
 
Join Date: Jul 2002
Location: Northern Virginia
Posts: 3,365
Received 54 Likes on 46 Posts
Do you have more history on the vehicle? Did you buy it like this, was it running just fine and then this happened, or did someone work on it and now the issue is happening?

The engine is likely running too lean due to timing being way out or the cat being clogged.
Molotovman is offline  
Old 04-29-19, 07:04 PM
  #8  
Full Member
 
Join Date: Dec 2015
Location: Thessaloniki
Posts: 101
Likes: 0
Received 3 Likes on 3 Posts
as someone already said , a trailing plug that doesnt fire (either because of bad plug or plug cable or faulty coil) will raise egts (+200C)
that will make your exhaust glow
AlienHack is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
danhaggis
2nd Generation Specific (1986-1992)
17
05-25-07 10:22 AM
rickylil
3rd Generation Specific (1993-2002)
42
05-06-06 04:49 PM
CrackHeadMel
2nd Generation Specific (1986-1992)
33
06-07-05 06:23 AM
79-r7
1st Generation Specific (1979-1985)
3
10-21-04 09:13 PM
kev
2nd Generation Specific (1986-1992)
8
01-16-02 06:23 PM


Thread Tools
Search this Thread
Quick Reply: Exhaust bright red hot after a short drive


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: