97 GM bad cats?????

[johnnyrauder]

my cheak engine light went on my mac. says i need new cats it's a single ex. my ?? are how many cat does it have and are they on the same side.
also he says it will cost about $800.00 it wont pass insp. as it is now. do byou think there is any way around it. the car has 82k on it..thanks in advance for any input...

[ctrlraven]

I'm guessing you have a Grand Marquis. The car has 4 cats, two on each side.

Exhaust;
Exhaust manfiolds connect to down tubes which have 2 cats per each side, then connect to a mid-pipe which yours turns into a Y shape for a single rear exhaust setup.

[johnnyrauder]

yes its a gm /.......how bout the price thats for 0ne side

[RoyLPita]

I've heard of a PCM reflash fixing this.

[ctrlraven]

$800 for one side? That's crazy. Check out Rockauto.com


EASTERN CATALYTIC CONVERTERS Part # 30315 Part is for non-California emissions and cannot be shipped to California
LEFT SIDE; 49 STATE DIRECT FIT - LEFT $159.79
EASTERN CATALYTIC CONVERTERS Part # 30316 Part is for non-California emissions and cannot be shipped to California
RIGHT SIDE.; 49 STATE DIRECT FIT - RIGHT $159.79


WALKER Part # 53270 ; Direct Fit $169.79
Dual Exhaust;Ultra Converter;RH
Single Exhaust;Ultra Converter;RH
WALKER Part # 53271 ; Direct Fit $169.79
Dual Exhaust;Ultra Converter;LH
Single Exhaust;Ultra Converter;LH

BOSAL Part # 0794088 Not Legal For Sale in the State of California
Front & Rear Assembly; Left $233.79
BOSAL Part # 0794087 Not Legal For Sale in the State of California
Front & Rear Assembly; Right $233.79

[sailsmen]

I have seen them priced as low as $55 per convertor. Many muffler shops will replace both sides and all 4 for ~$500.

[Ralph Sr.]

i thought that factory cats are good till 100,000 miles on gm cars ? come under emissions/ factory warranty ? maybe /may be not ? then again only from 2007 gm cars, and newer..

[ctrlraven]

i thought that factory cats are good till 100,000 miles on gm cars ? come under emissions/ factory warranty ? maybe /may be not ? then again only from 2007 gm cars, and newer..
GM - Grand Marquis not General Motors.

He is out of warranty for the cats for sure.

[RoyLPita]

TSB 3-24-5:
Some 1997 Crown Victoria, Grand Marquis and Town Car vehicles may exhibit a malfunction indicator lamp (MIL) on with diagnostic trouble code(s) (DTC'S) P0420 (Catalyst System Efficiency Below Threshold - Bank 1) and/or P0430 (Catalyst System Efficiency Below Threshold - Bank 2).

ACTION:
To service, reprogram the powertrain control module (PCM) to the latest calibration using WDS release B28.4 or higher. Replacement of catalysts is no longer necessary to address the most common causes of this condition.

Obtain an Authorized Modifications Decal (FPS 8262 - obtainable through DOES II, 25/pkg) and list the date, dealer number, and summary of modifications performed. Select a prominent place adjacent to the Vehicle Emission Control Information Decal suitable for installing the Authorized Modifications Decal. Clean the area, install the decal, and cover it with a clear plastic decal shield.

Keep us posted.

[johnnyrauder]

wow that's a mouth full thanks i'll cheack it out

[johnnyrauder]

ok hears the deal my mac. got it to pass by changing an ox. sensor.$200.00 bucks better than $800. i showed him the info. from roylpita. and he was pretty impressed and said well try it if it happens agian.he wasent aware of that procedure.
i just want to thank everyone that helped.especially roylpita.this site is filled with great people willing to help.
thanks agian.

johnny

[RoyLPita]

Glad to be of help to my friends and members here. Cya around.