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AznDrgn · Posted: Sun May 23, 2004 11:10 am Post subject: It Glows

I was taking a look in my engine bay today after I went to the store and back and to my surprise my exhaust manifold was glowing. I'm guessing it's due to the mix being too rich, I messed with the mix a bit about a week ago but I guess I made it too rich. Anyone else have any theories?
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-'87 Jeep Cherokee 4.0L 6" of lift 33" Super Swampers

-'83 Callaway 944 2.5L turbo, 300HP, 1 of 42 ever made

Lizard · Posted: Sun May 23, 2004 2:13 pm Post subject:

timing too far advanced and too lean will cause an extremely hot exhaust
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3 928s,

browning · Joined: 03 Feb 2004 Posts: 74 Location: salem arkansas

to rich would lower you egts prob running to lean.

gohim · Joined: 02 Nov 2002 Posts: 4459 Location: Rialto, CA

Running way too lean, could also be too much ignition timing advance.

Check the bottom of your exhaust manifold for cracks.

emoore924 · Joined: 13 Apr 2004 Posts: 2822

Have seen this with a plugged cat before

AznDrgn · Posted: Sat May 29, 2004 3:51 am Post subject:

just put a new cat in a year and a half ago so I hope it's not that.
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-'87 Jeep Cherokee 4.0L 6" of lift 33" Super Swampers

-'83 Callaway 944 2.5L turbo, 300HP, 1 of 42 ever made

Roger · Joined: 06 Jan 2003 Posts: 1235 Location: Cordova, TN

Exhaust glowing is from an extremly rich mixture. You should be eaisly able to tell by smelling the exhaust. The problem is that the fuel is continuing to burn as it moves out of the combustion chamber.

I have never heard of the exhaust glowing from a lean mixture. If the mixture is too lean it will burn the exhaust valves long before anything else.
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1981 924 NA

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