#2312659 - 06/11/11 09:53 AM
Cat efficiency below threshold BOTH banks??
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Climber
Registered: 08/29/09
Posts: 554
Loc: Southport, NC
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I'm getting codes for catalyst efficiency below threshold on bank 1 and bank 2. Before the motor swap, I was just getting a code for bank 1, now i'm getting one for both. FYI the car and exhaust has 165k miles, the motor's around 49k. I had to swap the passenger (bank 1 ?) upstream sensor with one from the '06 because the connector got cracked in the chaos. I've got the other 3 from the '06 and i'm going to try swapping them in first, according to Motorcraft they're the same part. What's the possibility all 4 of my cats took a dump at once? If the O2s don't fix it what am I looking at, cats?? FYI, I don't have a custom tune yet to make everything work well together. I've got about a month to get this thing inspection ready, stupid emissions inspection
Edited by fireandice9008 (06/11/11 09:54 AM) Edit Reason: mileage
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2000 P71, Boiling Spring Lakes NC Car 5 **SOLD** and still floating around somewhere... 2004 Mercury Marauder, Silver Birch #51 of 997. Built to be blown but still (for now) N/A!! 2007 P71, Albemarle County, VA Car 52.
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#2312670 - 06/11/11 10:21 AM
Re: Cat efficiency below threshold BOTH banks??
[Re: fireandice9008]
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Over the Hill
Registered: 05/01/07
Posts: 2191
Loc: SoCal High Desert
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If your scanner can monitor the O2 sensor outputs, check that they all are switching. I had 1 slow downstream sensor (Bank 1) on one car that caused both 0420 & 0430.
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'95 P71, 5xx,xxx miles, Rebuilt tranny, 2.73. Lives as a cab, and will die as a cab. (Died-FrontEnder) '96 P71, 640,xxx on original drivetrain. (Now parts car - T-bone & roll)(You should see the roof - A,B & C-pillars chopped on driver side) New to list: '96 MGM (Nice! @ 35x,xxx), '97 CV P71, '98 CV P71, '00 CV P71, 01 P71 (2 of 'em) '03 CV P71 (Nice so far) (All Ford Zinc Yellow w/Black decals & trim) And the list is growing........... Taxicab mechanic: I HATE DRIVERS!
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#2312673 - 06/11/11 10:34 AM
Re: Cat efficiency below threshold BOTH banks??
[Re: fireandice9008]
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Poobah
Registered: 07/24/08
Posts: 5972
Loc: New Jersey
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It can be the maf sensor, O2 sensors or the cats. I had this same problem on a 95 marquis. It gave me codes p0130 and p0131. After replacing 02 sensors, spark plugs, trying a new maf and trying a bounch of other stuff, car still had the codes and ran horrible. I then deceided to remove the catalyic converters passenger side and car ran extreamly new. Came to find out it was both cats on the passenger side that were clogged up to the max.
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#2312674 - 06/11/11 10:34 AM
Re: Cat efficiency below threshold BOTH banks??
[Re: BigNSlow]
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Climber
Registered: 08/29/09
Posts: 554
Loc: Southport, NC
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Make sure you don't have any exhaust leaks. Are you still using MAF from 2000? Yes, the entire top end is for the most part 2000. I'm under the impression i'll need a tune for the '06 MAF to work, when that happens i'm going to swap the entire air intake system for like an '04, or maybe the '06 if I can put in a port for the IAC.
_________________________
2000 P71, Boiling Spring Lakes NC Car 5 **SOLD** and still floating around somewhere... 2004 Mercury Marauder, Silver Birch #51 of 997. Built to be blown but still (for now) N/A!! 2007 P71, Albemarle County, VA Car 52.
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#2312676 - 06/11/11 10:36 AM
Re: Cat efficiency below threshold BOTH banks??
[Re: fireandice9008]
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Climber
Registered: 08/29/09
Posts: 554
Loc: Southport, NC
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Ford05, i'm thinking the pass. side cats may very well be clogged. I thought the driver's were okay, but they may have gone too. The old motor did burn oil like it was free.
I'm headed out now to swap the O2s since I have them on hand.
_________________________
2000 P71, Boiling Spring Lakes NC Car 5 **SOLD** and still floating around somewhere... 2004 Mercury Marauder, Silver Birch #51 of 997. Built to be blown but still (for now) N/A!! 2007 P71, Albemarle County, VA Car 52.
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#2312708 - 06/11/11 12:21 PM
Re: Cat efficiency below threshold BOTH banks??
[Re: fireandice9008]
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Over the Hill
Registered: 05/10/10
Posts: 4420
Loc: Virginia
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1998 Grand Marquis LS. 96K mi. .. Stock 2007 Grand Marquis GS. 90K mi. .. Stock 1996 F-150 XLT 196K mi Beater, Stock ---------- My Toys--------- (links are up)1969 Fairlane Cobra 428CJ 4-Speed 1972 Comet GT Restomod 306, C4 1988 Turbo Coupe 331 AOD & 3.73 .. Pressurized ½ Motor is History *****************NEW TOY!!!*********************1969 Base Fairlane 302, C4, 45K mi(really!) Now with P/S & PDB Gonna wake it up with a Blue Print headed 347
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#2312749 - 06/11/11 02:26 PM
Re: Cat efficiency below threshold BOTH banks??
[Re: fireandice9008]
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Poobah
Registered: 07/24/08
Posts: 5972
Loc: New Jersey
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The 95 marquis I worked on had an oil leak a few months ago. Don't know for how long but when I bought the car, the seller did tell me that it had fail emission and they had to replace a few gaskets and spend a few 100 bucks. When replacing the sparkplugs, the passenger side ones were completly black while the driver side were very clean and looked new. I'm still guess that the marquis still has a leak(oil) and it just caused the cats on that side to clog up with gunk.
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#2312773 - 06/11/11 03:25 PM
Re: Cat efficiency below threshold BOTH banks??
[Re: fireandice9008]
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Cynical Jackass
Poobah
Registered: 05/19/09
Posts: 5427
Loc: Somewhere in the CRC
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2003 Crown Victoria ( AKA Car Craft Crown Vic ) , Trick Flow 38CC top end kit, 04 Navigator water pump, Circle D multi disk 3500-3700 stall converter, Full SW exhaust, MM Airbox and MAF, ADTR zip tube, 78mm BBK Plenum and TB, Transgo Stage 2 shift kit, 3.73 with track lok, Naake coilover suspension, Henious control arms, Metco watts link, ARP watts link stud, Addco sway bars, Powerslot rotors with Hawk HPS pads, BH1976 headlight relay harness, Procar sportsman pro race seat's, 17" steel rims widened to 9.0 with Nitto 555's in 285/40/17 tire for the rear, Tuned by Mo's Speed Shop in Dallas Georgia....more mods coming soon. 1997 Mercury Grand Marquis HPP. Full PI engine swap, Stock PI torque converter, 04 Navigator water pump, 3.27 with trac lok
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#2312788 - 06/11/11 04:11 PM
Re: Cat efficiency below threshold BOTH banks??
[Re: fireandice9008]
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Climber
Registered: 08/29/09
Posts: 554
Loc: Southport, NC
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That's interesting reading/watching. I'm still not sure i'm sold on the idea of dumping lacquer thinner in my tank, but if it comes down to it I may. Custom cats are in the works, but not close enough for inspection.
I swapped the remaining 3 O2s and cleared it out. So far it's got 27 miles on it since then and -knock on wood- no CEL. It used to pop it in 4-6 miles. The front ones had a nice coat of some kind of white stuff on them, and the original rear one had rust inside the holes. We'll see if it holds, if it does it's getting inspected tuesday before it changes it's mind.
_________________________
2000 P71, Boiling Spring Lakes NC Car 5 **SOLD** and still floating around somewhere... 2004 Mercury Marauder, Silver Birch #51 of 997. Built to be blown but still (for now) N/A!! 2007 P71, Albemarle County, VA Car 52.
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#2312808 - 06/11/11 05:13 PM
Re: Cat efficiency below threshold BOTH banks??
[Re: fireandice9008]
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Cynical Jackass
Poobah
Registered: 05/19/09
Posts: 5427
Loc: Somewhere in the CRC
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I know of one person who has done it and saw results......and the car was OK. 1 gallon in 1/2 a tank of gas is not much......but just enough to do the job.
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2003 Crown Victoria ( AKA Car Craft Crown Vic ) , Trick Flow 38CC top end kit, 04 Navigator water pump, Circle D multi disk 3500-3700 stall converter, Full SW exhaust, MM Airbox and MAF, ADTR zip tube, 78mm BBK Plenum and TB, Transgo Stage 2 shift kit, 3.73 with track lok, Naake coilover suspension, Henious control arms, Metco watts link, ARP watts link stud, Addco sway bars, Powerslot rotors with Hawk HPS pads, BH1976 headlight relay harness, Procar sportsman pro race seat's, 17" steel rims widened to 9.0 with Nitto 555's in 285/40/17 tire for the rear, Tuned by Mo's Speed Shop in Dallas Georgia....more mods coming soon. 1997 Mercury Grand Marquis HPP. Full PI engine swap, Stock PI torque converter, 04 Navigator water pump, 3.27 with trac lok
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#2312833 - 06/11/11 06:28 PM
Re: Cat efficiency below threshold BOTH banks??
[Re: fireandice9008]
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Poobah
Registered: 07/24/08
Posts: 5972
Loc: New Jersey
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i wanted to do this but wasnt sure about it. I did remove the cats a dumbed in a big bucket of water with detergent and that didnt help. It was just completely clogged up.
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#2312856 - 06/11/11 08:02 PM
Re: Cat efficiency below threshold BOTH banks??
[Re: fireandice9008]
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Cynical Jackass
Poobah
Registered: 05/19/09
Posts: 5427
Loc: Somewhere in the CRC
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Its one of those things that you try when you got nothing to lose. If it worst your stoked.....if not then your at the same place you started at.
_________________________
2003 Crown Victoria ( AKA Car Craft Crown Vic ) , Trick Flow 38CC top end kit, 04 Navigator water pump, Circle D multi disk 3500-3700 stall converter, Full SW exhaust, MM Airbox and MAF, ADTR zip tube, 78mm BBK Plenum and TB, Transgo Stage 2 shift kit, 3.73 with track lok, Naake coilover suspension, Henious control arms, Metco watts link, ARP watts link stud, Addco sway bars, Powerslot rotors with Hawk HPS pads, BH1976 headlight relay harness, Procar sportsman pro race seat's, 17" steel rims widened to 9.0 with Nitto 555's in 285/40/17 tire for the rear, Tuned by Mo's Speed Shop in Dallas Georgia....more mods coming soon. 1997 Mercury Grand Marquis HPP. Full PI engine swap, Stock PI torque converter, 04 Navigator water pump, 3.27 with trac lok
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#2312865 - 06/11/11 08:23 PM
Re: Cat efficiency below threshold BOTH banks??
[Re: fireandice9008]
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Climber
Registered: 08/29/09
Posts: 554
Loc: Southport, NC
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Well...it's back on. It blessed me with its amber glow right at the 40 mile mark. I went back to Advance and read them again just to be sure, it's the same 2 codes as before. I can fork out the money for new cats, so I'm going to jump in with both feet and try the lacquer thinner.
Just for fun I stopped by the firehouse and busted out the thermal imager to see what they were running. The following temps are inside the heat shield, with the motor running.
D/S Front: 366 D/S Rear: 382
P/S Front: 390 P/S Rear: 393
The pipe running between the two cats was right at 500 degrees on each side.
_________________________
2000 P71, Boiling Spring Lakes NC Car 5 **SOLD** and still floating around somewhere... 2004 Mercury Marauder, Silver Birch #51 of 997. Built to be blown but still (for now) N/A!! 2007 P71, Albemarle County, VA Car 52.
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#2312878 - 06/11/11 08:58 PM
Re: Cat efficiency below threshold BOTH banks??
[Re: fireandice9008]
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Climber
Registered: 08/29/09
Posts: 554
Loc: Southport, NC
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I'm still not convinced...I think i'll try like a half gallon first and run it out in one run the same day. Anyone else tried the lacquer thinner trick?
_________________________
2000 P71, Boiling Spring Lakes NC Car 5 **SOLD** and still floating around somewhere... 2004 Mercury Marauder, Silver Birch #51 of 997. Built to be blown but still (for now) N/A!! 2007 P71, Albemarle County, VA Car 52.
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#2312903 - 06/11/11 09:32 PM
Re: Cat efficiency below threshold BOTH banks??
[Re: fireandice9008]
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Cynical Jackass
Poobah
Registered: 05/19/09
Posts: 5427
Loc: Somewhere in the CRC
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I'm still not convinced...I think i'll try like a half gallon first and run it out in one run the same day. Anyone else tried the lacquer thinner trick?
In the link to to the tread about this method.....at least one person has done it with there CV. The member who turned us on to this claims to have done it in 3 vehicles with great results. Here's the link again... https://www.crownvic.net/ubbthreads/ubbth...072#Post2264072
_________________________
2003 Crown Victoria ( AKA Car Craft Crown Vic ) , Trick Flow 38CC top end kit, 04 Navigator water pump, Circle D multi disk 3500-3700 stall converter, Full SW exhaust, MM Airbox and MAF, ADTR zip tube, 78mm BBK Plenum and TB, Transgo Stage 2 shift kit, 3.73 with track lok, Naake coilover suspension, Henious control arms, Metco watts link, ARP watts link stud, Addco sway bars, Powerslot rotors with Hawk HPS pads, BH1976 headlight relay harness, Procar sportsman pro race seat's, 17" steel rims widened to 9.0 with Nitto 555's in 285/40/17 tire for the rear, Tuned by Mo's Speed Shop in Dallas Georgia....more mods coming soon. 1997 Mercury Grand Marquis HPP. Full PI engine swap, Stock PI torque converter, 04 Navigator water pump, 3.27 with trac lok
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