Could the 02 scensors do this?

Dragondj11 · January 16th, 2009, 01:43 PM

I have a 2001 Mustang, and had to replace the cats on it. I had my local fab guy put it all in, and he put the 02 scensors in the wrong spot so they are reading the exhaust before it goes into the cat. It ran fine for about 2 days, and passed the smog test I had done. Then the check engine light came on, and I figured it was the 02 reading being way off. Well I have been driving it for about a month and a half that way, and the other night, it just started dying on me. I am getting a backfire on decel and she is losing power and feels like the exhaust it plugging up and not reving out. Is it possible that it has started running so rich that she is flooding out? Does anyone think it could just be I need to change the location of the scensors and all would be right with the world again, or would it be more likely a fuel pump going bad type thing???

Trick Tuners · January 16th, 2009, 02:01 PM

If he swapped the front and rear o2 the car would run real rich. It may be rich enough to melt the cats and plug up the exhaust. The O2s are one of the 2 most important sensors on the car and should always be wired correctly and operational (at least the front O2s.) If you have a friend with a xcal you can datalog it and see what is going on.

Dragondj11 · January 16th, 2009, 02:10 PM

Wish I had someone who had anything like that. Looks like into the dealer it goes for the diagnostic....

Trick Tuners · January 16th, 2009, 02:14 PM

hit up autozone or some place that will scan your codes for free and report back. The dealer will cost you $$ and it might be something else you can easily replace.

Onemanzu · January 16th, 2009, 03:33 PM

you've had a CEL for a while and you haven't had it pulled?

Dragondj11 · January 16th, 2009, 04:19 PM

Yes, had the cel for awhile. Did not have it checked, as I was sure it was just the 02 scensors sending a bad signal. And as far as I knew the worst thing that would happen from running rich aside from less power and bad fuel miles was the possibility of fouling plugs.

JASonic · January 16th, 2009, 04:45 PM

Originally Posted by Dragondj11

Yes, had the cel for awhile. Did not have it checked, as I was sure it was just the 02 scensors sending a bad signal. And as far as I knew the worst thing that would happen from running rich aside from less power and bad fuel miles was the possibility of fouling plugs.

If you can afford it, buy an Xcal or tuner that will read DTC's. It has been so helpfull with my car not to mention the gains you get. Its worth being able to read codes alone.

Dragondj11 · January 16th, 2009, 05:08 PM

I have been reading on that all day. I am going to get me one in a couple weeks when I get my tax refund in. I am thinking that, and having a shop fab me up some divorced duals and just fix it all. Maybe

JASonic · January 16th, 2009, 05:17 PM

Originally Posted by Dragondj11

I have been reading on that all day. I am going to get me one in a couple weeks when I get my tax refund in. I am thinking that, and having a shop fab me up some divorced duals and just fix it all. Maybe

Kick ass brother! Good luck. I've bought alot of "crap" for my car. The tuner was one thing I know that is well worth the $400.

ewells2420 · January 16th, 2009, 06:06 PM

dude seriously, can you not spell sensors correctly?

wannabeimportkiller · January 16th, 2009, 06:21 PM

lol ^ pwn

Trick Tuners · January 16th, 2009, 06:23 PM

Hit me up for the Xcal3 and i'll cut you a deal.

Dragondj11 · January 16th, 2009, 06:32 PM

Originally Posted by ewells2420

dude seriously, can you not spell sensors correctly?

obviously not. I had not even caught I was doing that.

Dragondj11 · January 16th, 2009, 06:32 PM

Originally Posted by Trick Tuners

Hit me up for the Xcal3 and i'll cut you a deal.

I won't have the cash flow for a few weeks yet, but I will do that. Thanks

JASonic · January 16th, 2009, 09:28 PM

Dragon...dont be discouraged about spelling...nobody is going to give a flying fuck when your car is running great. Take advantage of Joes offer there with Trick Tuners. You wont regret it kid.

Dragondj11 · January 20th, 2009, 07:55 PM

Well heard back from the shop, and after being on the diag. they agree the sensors are in the wrong spot and kicking the codes. Both need to be moved. Down fall is that the right side exhaust manifold is cracked and has an exhaust leak. The want $680 for the parts and labor. Tell me that ain't out of line???? Seriously, how hard would it be to change those myself? I have access to a lift but would only have a day to do it. Can that be changed out that fast?

graystang01 · January 20th, 2009, 10:52 PM

so the shop that fucked up your car is wantin to charge you again to fix their mistake? fuck that. go somewhere else

Dansby · January 21st, 2009, 12:53 AM

If the manifold is cracked, wait for your refund and do full exhaust, headers back.

JASonic · January 21st, 2009, 08:40 AM

Agree'd. But before you do anything else, tke it to another shop and get a second opinion. the Ford dealership was telling me my manifold was cracked. When the other shop took them off and gave them to me guess what? NO CRACKS. The crack was actually still in the mid pipe that THEY fixed under warranty.

BTW- for anyone that may be from Bradenton area. Never use Autoway Ford here.

Dragondj11 · January 21st, 2009, 10:42 AM

Originally Posted by jdansby1

If the manifold is cracked, wait for your refund and do full exhaust, headers back.

That is why I am asking how hard are they to do yourself? Anyone else done them? There are a couple of people with some good offers over in the classifieds, and such. Could I get it done in one day on my own?

January 16th, 2009, 01:43 PM	#1
Dragondj11 Regular 2001 V6 Mustang Join Date: May 2008 Location: Corning CA Posts: 52 iTrader: 0 reviews	Could the 02 scensors do this? I have a 2001 Mustang, and had to replace the cats on it. I had my local fab guy put it all in, and he put the 02 scensors in the wrong spot so they are reading the exhaust before it goes into the cat. It ran fine for about 2 days, and passed the smog test I had done. Then the check engine light came on, and I figured it was the 02 reading being way off. Well I have been driving it for about a month and a half that way, and the other night, it just started dying on me. I am getting a backfire on decel and she is losing power and feels like the exhaust it plugging up and not reving out. Is it possible that it has started running so rich that she is flooding out? Does anyone think it could just be I need to change the location of the scensors and all would be right with the world again, or would it be more likely a fuel pump going bad type thing???

January 16th, 2009, 02:01 PM	#2
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,471 iTrader: 3 reviews	If he swapped the front and rear o2 the car would run real rich. It may be rich enough to melt the cats and plug up the exhaust. The O2s are one of the 2 most important sensors on the car and should always be wired correctly and operational (at least the front O2s.) If you have a friend with a xcal you can datalog it and see what is going on. __________________ Check out my forums for stuff on troubleshooting, tuning, etc We teamed up with Socal Performance Racing to bring dyno tuning to San Diego. Be friends with us on FB

January 16th, 2009, 02:14 PM	#4
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,471 iTrader: 3 reviews	hit up autozone or some place that will scan your codes for free and report back. The dealer will cost you $$ and it might be something else you can easily replace. __________________ Check out my forums for stuff on troubleshooting, tuning, etc We teamed up with Socal Performance Racing to bring dyno tuning to San Diego. Be friends with us on FB

January 16th, 2009, 03:33 PM	#5
Onemanzu ¡ʇsnq ɹo uʍop ǝpısdn Join Date: Oct 2006 Location: Looking for free hand jobs in poland springs nebraska... silly gooses Posts: 12,514 Blog Entries: 1 iTrader: 0 reviews	you've had a CEL for a while and you haven't had it pulled? __________________ My Foz

January 16th, 2009, 06:21 PM	#11
wannabeimportkiller Hardcore Enthusiast 2012 Race Red GT/CS Join Date: Feb 2007 Location: Belmont, NC Posts: 2,106 iTrader: 0 reviews	lol ^ pwn __________________ 2012 Race Red GT/CS 98 GT-Gone NCMM ORIGINAL

January 16th, 2009, 02:10 PM	#3
Dragondj11 Regular 2001 V6 Mustang Join Date: May 2008 Location: Corning CA Posts: 52 iTrader: 0 reviews	Wish I had someone who had anything like that. Looks like into the dealer it goes for the diagnostic....

January 16th, 2009, 04:19 PM	#6
Dragondj11 Regular 2001 V6 Mustang Join Date: May 2008 Location: Corning CA Posts: 52 iTrader: 0 reviews	Yes, had the cel for awhile. Did not have it checked, as I was sure it was just the 02 scensors sending a bad signal. And as far as I knew the worst thing that would happen from running rich aside from less power and bad fuel miles was the possibility of fouling plugs.

January 16th, 2009, 05:08 PM	#8
Dragondj11 Regular 2001 V6 Mustang Join Date: May 2008 Location: Corning CA Posts: 52 iTrader: 0 reviews	I have been reading on that all day. I am going to get me one in a couple weeks when I get my tax refund in. I am thinking that, and having a shop fab me up some divorced duals and just fix it all. Maybe

January 16th, 2009, 06:06 PM	#10
ewells2420 Banned 2003 V6 Mustang 14.2 @ 96 Join Date: Jun 2008 Location: NC Posts: 644 iTrader: 0 reviews	dude seriously, can you not spell sensors correctly?

January 16th, 2009, 06:23 PM	#12
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,471 iTrader: 3 reviews	Hit me up for the Xcal3 and i'll cut you a deal. __________________ Check out my forums for stuff on troubleshooting, tuning, etc We teamed up with Socal Performance Racing to bring dyno tuning to San Diego. Be friends with us on FB

January 16th, 2009, 09:28 PM	#15
JASonic The George Forman of Keepers Join Date: Feb 2007 Posts: 2,406 iTrader: 20 reviews	Dragon...dont be discouraged about spelling...nobody is going to give a flying fuck when your car is running great. Take advantage of Joes offer there with Trick Tuners. You wont regret it kid.

January 20th, 2009, 07:55 PM	#16
Dragondj11 Regular 2001 V6 Mustang Join Date: May 2008 Location: Corning CA Posts: 52 iTrader: 0 reviews	Well heard back from the shop, and after being on the diag. they agree the sensors are in the wrong spot and kicking the codes. Both need to be moved. Down fall is that the right side exhaust manifold is cracked and has an exhaust leak. The want $680 for the parts and labor. Tell me that ain't out of line???? Seriously, how hard would it be to change those myself? I have access to a lift but would only have a day to do it. Can that be changed out that fast?

January 21st, 2009, 12:53 AM	#18
Dansby Hardcore Enthusiast Join Date: Mar 2007 Location: Orange, Texas Posts: 2,313 iTrader: 1 reviews	If the manifold is cracked, wait for your refund and do full exhaust, headers back.

January 21st, 2009, 08:40 AM	#19
JASonic The George Forman of Keepers Join Date: Feb 2007 Posts: 2,406 iTrader: 20 reviews	Agree'd. But before you do anything else, tke it to another shop and get a second opinion. the Ford dealership was telling me my manifold was cracked. When the other shop took them off and gave them to me guess what? NO CRACKS. The crack was actually still in the mid pipe that THEY fixed under warranty. BTW- for anyone that may be from Bradenton area. Never use Autoway Ford here.

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