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Old 02-18-2013, 01:38 AM   #4
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Join Date: Feb 2013
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Location: Anytown, United States
What I Drive: 2002 Gold SE

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Originally Posted by ManiacalZX3 View Post
Well, what it sounds like is that you got a leak between throttle body and maf, the leaked caused engine to think it was running lean so it added fuel to compensate for too much and not enough fuel. The extra fuel (which it didnt need) caused the catalyst to melt which restricts hot gases from leaving the engine and built up causing excess heat causing plastic to melt.

MAF and/or IAC (idle air control) may or may not have been bad considering how bad your condition was at the point of diagnosis, since Im not their I really dont know.

Now the transmission may have gone into fail safe mode or just lost an input like a sensor signal, and may not be related. Its possible a sensor wire may have been burn/damaged form excess heat off the exhaust, or during repair a sensor may have come disconnected. I would go over all the wire under the hood and car to see if their is loose or damaged. If your friend has a good scan tool he should be able to look at the transmisson to see whats going on.

Also the transmission most of the time does not set a cel as the cel is for emissions issues with the engine. Hope in some way this helps.
Thanks for the reply......and here is an update.

The leak was patched.

Apparently, the CAT is clogged and was returning to much hot air via the EGR that caused the manifold to melt in a couple of spots, therefore the leak and the idle problems.

The manifold was patched with jb weld and as a temporary precaution, the EGR was disconnected and sealed until the CAT is replaced. (Hopefully within the next few days)

He also stated the IAC was shot. And the MAF I bought on line was bad as well.

The tranny problem was being caused by the MAF.

I installed another MAF he had laying around and voila!! the engine idle'd great and the transmission issue went away. Yes, the MAF was causing transmission problems (I think I dogged a bullet there).

So now the car is running fine (sort off) as the mechanic said the CAT needs to be changed and the IAC. The car is running fine, but still feels a little "off" when the car idles.

Is that related to the IAC that is bad?

Or its the CAT that is clogged and making the engine a little rough on idle.

Is there a way to actually test the CAT?

Also, Can someone tell me what CAT I can buy and have it replaced???????

I am very confused, and here is why......

The car is from CA. BUT was exported to Mexico, where it has Mexican tags and registration. I see cats on e@ay for as low as $50 (universal)....can I use one of those CATS?

They say they are not to be installed on CA cars, but since its not in CA anymore and I have one of those universal cats installed/adapted in the cars here (south of the border), can I just go ahead and install one of those and the car will be driving well, and will not have any issues with the car not running like it should?

Someone care to shine a light on this?

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