CEL codes.... - TCCoA Forums
 
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post #1 of 13 (permalink) Old 09-07-2006, 09:42 PM Thread Starter
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CEL codes....

uh i think i need a tune....just finished PI swap, i'm sure most of u read my other post, i'm the guy who bent 4 valves, lol

ne who;
PO171- system lean, bank 1
PO174- system lean, bank 2
PO302- #2 misfire
PO304- #4 misfire

and of course PO161 & PO141.....but those are cuz i deleted the rear O2's

1997 4.6L LX SPORT, rollin on 19's
http://www.cardomain.com/ride/856858
http://s12.photobucket.com/albums/a241/steviewonder13/
PI heads, PI intake, Comp 262's, Comp Valve Springs, Kooks headers, 3.73 TL, 180*T-stat, RSTB, lowered 1.5", A/C Delete Pulley, Custom exhaust. Block #2
-- SCT dyno tune 279RWHP & 310RWTQ - DD tune, SAE corrected
14.5 @ 97mph (need a higher stall, car bogged w/ stock converter + mickeys, lol)
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post #2 of 13 (permalink) Old 09-07-2006, 10:14 PM Thread Starter
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could turning that screw with no head on the throttle body cause these....cuz we turned it to let more air in because it wouldn't idle

1997 4.6L LX SPORT, rollin on 19's
http://www.cardomain.com/ride/856858
http://s12.photobucket.com/albums/a241/steviewonder13/
PI heads, PI intake, Comp 262's, Comp Valve Springs, Kooks headers, 3.73 TL, 180*T-stat, RSTB, lowered 1.5", A/C Delete Pulley, Custom exhaust. Block #2
-- SCT dyno tune 279RWHP & 310RWTQ - DD tune, SAE corrected
14.5 @ 97mph (need a higher stall, car bogged w/ stock converter + mickeys, lol)
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post #3 of 13 (permalink) Old 09-08-2006, 12:05 AM
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you need a tune. clear the codes after the tune and if they come back, you need o2 sensors.




"Booyah". Stu Scott.
1996 Braincoated, all Aluminum PI powered and obscenely loud Pearl White Tbird [email protected] AKA Dyrdek.
2013 Black on black FX2 Supercrew Ecoboost F150. Roll onto the scene with the ceiling missing.
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post #4 of 13 (permalink) Old 09-08-2006, 12:14 AM
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a proper PI swap would still be able to idle......it may idle funky for a while while the EEC relearns certain parameters.......if both banks are lean, and they weren't before, you may have vacuum leaks.....plenty of places to screw up for that to happen......i totally forgot to hook up the main vacuum line on the upper plenum when i did my pi swap....after i fixed that, idled just fine, even with the crower cams

cylinders 2 & 4 are not paired up in our waste spark system, so i suspect spark plugs or wires, or maybe injectors....easiest thing is to swap parts and see if the codes switch cylinders.....could also swap coil packs to see where the codes end up
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post #5 of 13 (permalink) Old 09-08-2006, 10:22 AM Thread Starter
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reset that screw, cleaned MAF, switched coil packs.....plug wires are accel, less than a year old

going to test...

1997 4.6L LX SPORT, rollin on 19's
http://www.cardomain.com/ride/856858
http://s12.photobucket.com/albums/a241/steviewonder13/
PI heads, PI intake, Comp 262's, Comp Valve Springs, Kooks headers, 3.73 TL, 180*T-stat, RSTB, lowered 1.5", A/C Delete Pulley, Custom exhaust. Block #2
-- SCT dyno tune 279RWHP & 310RWTQ - DD tune, SAE corrected
14.5 @ 97mph (need a higher stall, car bogged w/ stock converter + mickeys, lol)
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post #6 of 13 (permalink) Old 09-08-2006, 10:48 AM
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Make sure you dont cook your cats ..

1997 Ford Thunderbird 4.6 Sport .

60'...... 2.06
1/8th .. 9.194
mph .... 77.13

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PI heads *PI intake*Mark VIII torque converter*Cobra T-loc w\4.10's * Jmod*tranny fluid cooler*P&P stock T/B & plenum*UD pulleys* Dynotech 4in ds*80mm Lightning maf*Xcal2*02 GT intake tube.
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post #7 of 13 (permalink) Old 09-08-2006, 10:57 AM Thread Starter
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Quote:
Originally Posted by cjchevez
Make sure you dont cook your cats ..
i'm running open headers

it drove better. yesterday it was shuddering/missing at part thottle (1200-1500rpm) in 4th, and it's not doing that ne more

i'll read the codes again once i get out of class at 2

1997 4.6L LX SPORT, rollin on 19's
http://www.cardomain.com/ride/856858
http://s12.photobucket.com/albums/a241/steviewonder13/
PI heads, PI intake, Comp 262's, Comp Valve Springs, Kooks headers, 3.73 TL, 180*T-stat, RSTB, lowered 1.5", A/C Delete Pulley, Custom exhaust. Block #2
-- SCT dyno tune 279RWHP & 310RWTQ - DD tune, SAE corrected
14.5 @ 97mph (need a higher stall, car bogged w/ stock converter + mickeys, lol)
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post #8 of 13 (permalink) Old 09-08-2006, 11:57 AM
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mine did the same thing initially when i ran the 262s. After driving it around for a while, it missed less and was more driveable.




"Booyah". Stu Scott.
1996 Braincoated, all Aluminum PI powered and obscenely loud Pearl White Tbird [email protected] AKA Dyrdek.
2013 Black on black FX2 Supercrew Ecoboost F150. Roll onto the scene with the ceiling missing.
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post #9 of 13 (permalink) Old 09-08-2006, 01:20 PM Thread Starter
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will the rear 02 sensors work if i were to hook them up in the front spots? i think my front O2 sensors might be going because the lean code for bank 1 came back after class....

1997 4.6L LX SPORT, rollin on 19's
http://www.cardomain.com/ride/856858
http://s12.photobucket.com/albums/a241/steviewonder13/
PI heads, PI intake, Comp 262's, Comp Valve Springs, Kooks headers, 3.73 TL, 180*T-stat, RSTB, lowered 1.5", A/C Delete Pulley, Custom exhaust. Block #2
-- SCT dyno tune 279RWHP & 310RWTQ - DD tune, SAE corrected
14.5 @ 97mph (need a higher stall, car bogged w/ stock converter + mickeys, lol)
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post #10 of 13 (permalink) Old 09-08-2006, 01:34 PM
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not sure. You could try it, but I would rather run new o2s if the problem really is in the sensors.




"Booyah". Stu Scott.
1996 Braincoated, all Aluminum PI powered and obscenely loud Pearl White Tbird [email protected] AKA Dyrdek.
2013 Black on black FX2 Supercrew Ecoboost F150. Roll onto the scene with the ceiling missing.
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post #11 of 13 (permalink) Old 09-08-2006, 03:07 PM
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Why don't you put your exhaust back on? If you are running open header, then you dont have O2 sensors in the system, right? Not to mention your valves are probably hating you for driving the car with no exhaust. Don't skip out on things just because you are in a rush to drive the car. A friend of mine pretty much exploded his exhaust manifold after only 2 weeks of open header driving.

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-MODS-
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post #12 of 13 (permalink) Old 09-08-2006, 06:51 PM Thread Starter
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the old exhaust will not fit......so i need to make a new exhaust


Quote:
Originally Posted by 96_LX
A friend of mine pretty much exploded his exhaust manifold after only 2 weeks of open header driving.
huh?

1997 4.6L LX SPORT, rollin on 19's
http://www.cardomain.com/ride/856858
http://s12.photobucket.com/albums/a241/steviewonder13/
PI heads, PI intake, Comp 262's, Comp Valve Springs, Kooks headers, 3.73 TL, 180*T-stat, RSTB, lowered 1.5", A/C Delete Pulley, Custom exhaust. Block #2
-- SCT dyno tune 279RWHP & 310RWTQ - DD tune, SAE corrected
14.5 @ 97mph (need a higher stall, car bogged w/ stock converter + mickeys, lol)
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post #13 of 13 (permalink) Old 09-08-2006, 09:55 PM
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Open headers..... no wonder you are running lean. You need to have a closed system to get the proper reading from the O2s. It's drawing in fresh air back up the headers between each exhaust pulse.

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