got my 88 coupe back...but the cats glow red hot??

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01-06-2009, 12:07 PM

#21

FORD TOUGH

4th Gear Member

Join Date: Oct 2008

Location: Virginia

Posts: 1,107

If the cats are not clogged gutting them or putting a off road pipe is not really going to fix the problem because whatever is causing them to glow still needs to be fixed.

01-06-2009, 04:34 PM

#22

HACKGT350

6th Gear Member

Join Date: Jan 2006

Location: new jersey

Posts: 6,635

Quote:

Originally Posted by FORD TOUGH

A customer had a mid 80's ford truck and the cat on it was getting like 1100-1200 degrees (you could not lay your hand on the floor board) that whole thing was glowing orange but the manifold on it was not.

because of the chemical reaction going on inside the cat they normally see temperatures above that already but only inside the cat.

01-06-2009, 04:58 PM

#23

cammedlx

5th Gear Member

Join Date: Jul 2004

Location: North Cacalaky

Posts: 2,055

If the cat was 100% restricted it would cause noticible running problems..But the honey comb inside can become disloged and cause enough restriction to have it overheat and become cherry red.If it was a vaccum leak or timing issue the headers would glow red before the cats.Also if it was dumping excess fuel into the pipes the **** would backfire like chitty chitty bang bang once the cats got that hot because there would be no way for that much fuel to enter the pipes without igniting and causing backfires..I would take a rubber mallet and "tap" on the cats and listen for noise..If it sounds like some rocks in a can the honeycomb has come lose.