: Too hot cat converter?



HUF
08-23-11, 04:25 AM
Today, after a 20 mile trip, when I got out of car, I have noticed unusual heat wave coming from the driver side of the car. I touched all the rims, thinking the brakes could be dragging - nothing. There was no heat wave on the passenger side.

Later I realized that it could be driver side cat converter... I have recently replaced driver side AC Delco plugs with Iridium NGK and the original wires with AC Delco. I did notice the resistance of the new wire set was much higher that the old one...

Now, because I did only the driver side, I am curious if that replacement could cause rich condition and too hot cat converter... I do not feel any power loss.

I hate tune-ups! The car was fine, what the hell I decided to replace the plugs and wires! http://www.impalassforum.com/vBulletin/images/smilies/frown.gif

I have planned a 500 mile road trip. Is it safe to drive like that?

jayoldschool
08-23-11, 11:36 AM
I wouldn't drive it far with it like that. Too hot, and the cat matrix will melt down. If it were me, I would change out the NGKs for some AC Delco plugs. If that doesn't help, check for a sticking or leaking injector on that bank.

N0DIH
08-23-11, 02:46 PM
NGK is OEM plug for a lot, if not all 3800's (L67's), sold thru AC Delco. They are very good plugs.


I wouldn't drive it far with it like that. Too hot, and the cat matrix will melt down. If it were me, I would change out the NGKs for some AC Delco plugs. If that doesn't help, check for a sticking or leaking injector on that bank.

brougham
08-23-11, 08:46 PM
Change the rest of the plugs before doing any long driving with it. Cats do get hot and they will also glow if there is a problem. If there's no other signs that something is wrong don't worry too much about it.

HUF
08-24-11, 11:59 AM
I made a 200 miles trip with no problem. stopped in the middle of it, opened the hood and did not feel like the driver side cat was excessively hot. Probably I have overreacted the other day, some light breeze could create a heat wave from the exhaust system which I associated with problematic cat by mistake. Thanks for all suggestions, gents.

N0DIH
08-24-11, 12:10 PM
Get under car and look and see if the cat case is bluish like it got too hot, it might still have been going nuts, and easily can damage the substrate inside.