Posts: 21
Joined: 6/14/2007 From: Martinez, CA Status: offline
i just bought this 2003 cobra with 50k miles on it. it looks simi stock i can see the fuel injectors are blue which could mean they are after market but im not sure. i have never owned a ford befor. its got a CAI and Basani exhaust. the car runs good but the service engine light came on. i hooked it up to a diagnostic tool and it spit out 2 codes. it said something about rear exhaust 02 sensors are bad bank 1 and bank 2. when i coast the car on the freeway and or anywhere almost its idel will bog from 1000rpms to 500rpms and it will flucuate up and down when out or gear or in idel. last night i mashed the car up to 100mph on a backroad and when i took it out of gear to slow down the car bogged out and turned off and i had to turn it back on while rolling down the road. can this problem be related to my O2 sensors going bad? the car does smell like it rusn alittle rich. how much are the 02 sensors and can i install them myself. again i have never owned a ford until this week and id like for my new ford family to help me with solving this mistery so i dont have to take it into a dealership. thanks guys
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2000 Camaro SS Blk Hardtop M6 w/ Bolt ons 1SICLS1 *SOLD 2004 Acura TSX With Navi. *SOLD 2004 Acura RSX -D.D. 2003 SVT Mustang Cobra M6 w/ Bolts ons -Current -Bassanni X and cat-back, K&N CAI, Spec Stage2, Free Mods
Team MF Member #002 Posts: 1401
Joined: 7/14/2006 From: Pittsburg, CA (BAY AREA!) Status: offline
Welcome to the forum!
You're having a lot of things going on at once with your car. It's hard to say what it could be. Sounds like you may have the stall problem. There is a TSB on it, and a dealer will be able to take care of that for you.
But as far as your CEL light goes, I have no clue as to what that could be. Someone here might be able to help you.
But since you are new to your Cobra, you should join svtperformance.com. There is a lot more information available on our cars over there than here. There's A LOT of things you need to learn about your car, and svtperformance.com is a good place to start. Also, If no one here can chime in and help you out better than I can, If you post this in the engine/tuning section (after you search), you'll for sure find the solution to your problems.
< Message edited by PWORLDSTANG -- 6/14/2007 1:06:52 PM >
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'04 Cobra Too many mods to list.. Stage IV Port, etc. 473RWHP/467RWTQ (Old Numbers) New Numbers Coming Soon Tuned by Shaun @ Advanced Engine Development
Team MF Member #002 Posts: 1401
Joined: 7/14/2006 From: Pittsburg, CA (BAY AREA!) Status: offline
BTW, the blue injectors are the stock ones.
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'04 Cobra Too many mods to list.. Stage IV Port, etc. 473RWHP/467RWTQ (Old Numbers) New Numbers Coming Soon Tuned by Shaun @ Advanced Engine Development
Posts: 21
Joined: 6/14/2007 From: Martinez, CA Status: offline
im not sure about the off road h pipe. i got this read out from autozone.
Here are the codes the PCM spit out P0420 (Bank 1) and P0430 (Bank 2)
TROUBLESHOOTING P0420
The PCM has determined that the catalyst system efficiency for bank 1 is below threshold for the current engine operating conditions. (Bank 1 identifies the location of cylinder #1, while bank 2 identifies the cylinders on the opposite bank)
Definition Catalyst efficiency low-bank 1 Explanation The oxygen sensors monitor the catalytic converters ability to store oxygen.
Probable Causes:
1.-catalytic converter defective (failure possibly due to #2, 3, or 4) 2.-Engine misfire or running condition 3.-Large vacuum leak 4.-Engine oil leakage into exhaust-valve guide seals, piston rings
I wish i knew what exactly was wrong with it. i baot some seafoam fuel system cleaner to help clean stuff up in the motor. i gotta take this car back to san fran from chicago. i hope it can make it. sow hat do you guys think it could be or i should do. im scared of taking it to some random mechanic because in my expierence with muscle cars i get f*cked everytime and right now with all my legal stuff i cant afford to many extra costs. my DD has a flat tire so im stuff driving the cobra which is killing me since i gotta drive it 60 miles a day.
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2000 Camaro SS Blk Hardtop M6 w/ Bolt ons 1SICLS1 *SOLD 2004 Acura TSX With Navi. *SOLD 2004 Acura RSX -D.D. 2003 SVT Mustang Cobra M6 w/ Bolts ons -Current -Bassanni X and cat-back, K&N CAI, Spec Stage2, Free Mods
Posts: 21
Joined: 6/14/2007 From: Martinez, CA Status: offline
do you guys think this issue could be the reason my cobra is getting worse gas mileage then expected lol i gotta take it back to CA from chicago can i drive it with bad 02 sensors? or is that a bad idea???
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2000 Camaro SS Blk Hardtop M6 w/ Bolt ons 1SICLS1 *SOLD 2004 Acura TSX With Navi. *SOLD 2004 Acura RSX -D.D. 2003 SVT Mustang Cobra M6 w/ Bolts ons -Current -Bassanni X and cat-back, K&N CAI, Spec Stage2, Free Mods
02 sensors are easy to replace and they are about $60. All you gotta do is look at your exhaust and you will see it sticking out of the pipe ( kind of looks like a spark plug sticking out of the exhaust pipe). you get the right sized wrench unscrew the old one unplug it then plug up the new one and screw it in. Very easy job to do I did mine my self when i was 16 so..... a bad 02 sensor can very well cause bad gas mileage but i dont know if that is your stalling prob.
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97 cobra :roush exhaust, 315/35/17s on back, throttle body spacer, and bbk under drive pulleys. coming soon 3.73s
Posts: 21
Joined: 6/14/2007 From: Martinez, CA Status: offline
it does seem to be running rich. i dont know if the previous owner had it tuned at all. i got this car from a dealership. today im gonna replace the o2 sensors on bank 1 and bank 2 and see if that fixes all these problems i got currently. i hope it does. my exhaust rattles kinda badly sometimes in lower rpms like around the 2000 rpm range im gonna see if any of the exhaust brackets are loose or missing, causing it to make those sounds when im accelerating or downshifting sometimes.
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2000 Camaro SS Blk Hardtop M6 w/ Bolt ons 1SICLS1 *SOLD 2004 Acura TSX With Navi. *SOLD 2004 Acura RSX -D.D. 2003 SVT Mustang Cobra M6 w/ Bolts ons -Current -Bassanni X and cat-back, K&N CAI, Spec Stage2, Free Mods
ORIGINAL: 1sicls1 my exhaust rattles kinda badly sometimes in lower rpms like around the 2000 rpm range im gonna see if any of the exhaust brackets are loose or missing, causing it to make those sounds when im accelerating or downshifting sometimes.
If it always happens right around 2000-2200 it is probably just "drone". The aftermarket exhaust hits a point where it begins to resonate loudly and many seem to get that right around 2K rpms.
Posts: 21
Joined: 6/14/2007 From: Martinez, CA Status: offline
i took it to a shop they replaced my fuel pressure sensor on the fuel rail. my cars fuel pressure was running at 28psi insted of 40 psi. they cant figure out why its having trouble finding idle. if u leave it on for awhile the car will just die... if i had more money if send it back to the shop to have it fixed further.
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2000 Camaro SS Blk Hardtop M6 w/ Bolt ons 1SICLS1 *SOLD 2004 Acura TSX With Navi. *SOLD 2004 Acura RSX -D.D. 2003 SVT Mustang Cobra M6 w/ Bolts ons -Current -Bassanni X and cat-back, K&N CAI, Spec Stage2, Free Mods
Posts: 21
Joined: 6/14/2007 From: Martinez, CA Status: offline
i dont know the CAI has no markings. the mechanic took the K&N filter off and ran the car and it still had issues, then he cleaned the MAF and it still had issues. he said the way it runs it might have been tuned but he cant tell...
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2000 Camaro SS Blk Hardtop M6 w/ Bolt ons 1SICLS1 *SOLD 2004 Acura TSX With Navi. *SOLD 2004 Acura RSX -D.D. 2003 SVT Mustang Cobra M6 w/ Bolts ons -Current -Bassanni X and cat-back, K&N CAI, Spec Stage2, Free Mods
if you install a stock mid pipe and reset the battery the code will go away. or you can a set of MIL eleminators and install them that will also take care of the problem
Congratulations on buying your 2003 Cobra! You're gonna love it. Since you're new to the 2003 Cobra, the FAQ page on my website will provide you some very useful info. http://www.stangshiftergaskets.com/2003_2004faqs.htm
Posts: 21
Joined: 6/14/2007 From: Martinez, CA Status: offline
thanks but i have already read that. do you guys think honestly this car is gonna be able to drive from chicago back to california in its current state. i drive it daily right now and it runs fine... should i be periniod of taking it cross country???
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2000 Camaro SS Blk Hardtop M6 w/ Bolt ons 1SICLS1 *SOLD 2004 Acura TSX With Navi. *SOLD 2004 Acura RSX -D.D. 2003 SVT Mustang Cobra M6 w/ Bolts ons -Current -Bassanni X and cat-back, K&N CAI, Spec Stage2, Free Mods
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NEED HELP WITH MY 03 Cobra! - 
