Go Back   MustangForums.com > Ford Mustang Tech > 2005 - 2014 Mustangs
Sign in using an external account
Register Forgot Password?
Search


2005 - 2014 Mustangs Discussions on the latest S197 model Mustangs from Ford.

Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


check engine light problem

Reply
 
 
 
 
Thread Tools Search this Thread
Old 07-15-2014, 11:37 PM   #1
Rozay_palm
 
Join Date: Feb 2014
Vehicle: 2006 mustang gt
Location: Washington
Posts: 12
Default check engine light problem

hey guys first time posting
so ill try and make it short.so i have an 06 GT. Mods=full exhaust with longtubes,underdrive pullys, ford racing cold air, 4.10 gears, and tune.
after i installed my long tubes i had a lot of problems with my CEL alot of slow response codes. bama eventually fixed the problem. i thought.
i also replaced the 02S.
about a week ago the light came on again, this time for multiple misfire codes and multiple cylinder misfires. i thought it would be good to replace the plugs and coils(50k on engine) i cleared the codes and after two drive cycles the light was back on with only three codes a multiple mis and a cylinder 3

could it be as simple as a bad plug or coil? tune?
appreciate some help. thank you.
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
Rozay_palm is offline   Reply With Quote
Old 07-16-2014, 01:00 AM   #2
Lethaldosage423
4th Gear Member
 
Lethaldosage423's Avatar
 
Join Date: Apr 2008
Vehicle: 05 DodgeRam 2500 CUMMINS
Location: Southern California
Posts: 1,603
christob90
Default

It could be all of that.
Does the car feel like is has a misfire?
If so, with the car running unplug coil number 3. Does the car run worse or the same?
If it runs worse you probably have another cylinder misfiring as well.

If the run doesn't change with the coil unplugged, plug it back in and unbolt the coil. With the engine running, pull the coil up a little. Can you hear it?(it will make a snapping noise)( be careful not to Get a shock, they suck.)

If it is snapping, the coil is working .next, ensure you put the correct spark plugs In.
If it is not snapping, most likely the coil is bad.

So let's say correct spark plugs and the coil works. Next you want to check the fuel injector. Easiest way is to use a mechanics stethoscope or a long screwdriver. Place it on the cylinder 3 injector (middle of the injector) is it clicking? Listen to the other injectors, do they sound the same? If yes then your injector is good. If no then you want to check for a signal so get yourself a noid light, it's a small light that plugs into the injector plug off your harnes. Plug In the noid light and start the car, is the light pulsing? If he's them you have signal so most likely tour injector is bad. If no then you may have a wiring harnes issue, broken wire or bad PCM .

So if you have spark and fuel,you may have low compression on that cylinder. Do a compression test .

If you still suspect the coil. Mark it, swap it with say cylindr 1 ,clear the CEL and drive it and see if you still get a cylinder 3 misfire or see if it's now a cylinder 1 misfire.


I kinda sped through the basics so it may be confusing. Feel free to ask any questions and I'll get back to you
-Chris
__________________
2014 black Mustang5.0 track package, Recaros.
Roush axle back with 4.5 tips /Boss diffuser
Jlt can
Airraid+Bama 91
Barton twin post shifter bracket
Whiteline adjustable sway bar
Whiteline lower control arm relocation brackets
Whiteline adjustable lower control arms

05 white Mustang 4.0 sold
05 white Dodge 2500 Cummins sold and missed
Lethaldosage423 is offline   Reply With Quote
Old 07-16-2014, 01:02 AM   #3
Lethaldosage423
4th Gear Member
 
Lethaldosage423's Avatar
 
Join Date: Apr 2008
Vehicle: 05 DodgeRam 2500 CUMMINS
Location: Southern California
Posts: 1,603
christob90
Default

After re reading your post, you could try flashing the car to stock then re uploading your tune just to see if that makes a difference
__________________
2014 black Mustang5.0 track package, Recaros.
Roush axle back with 4.5 tips /Boss diffuser
Jlt can
Airraid+Bama 91
Barton twin post shifter bracket
Whiteline adjustable sway bar
Whiteline lower control arm relocation brackets
Whiteline adjustable lower control arms

05 white Mustang 4.0 sold
05 white Dodge 2500 Cummins sold and missed
Lethaldosage423 is offline   Reply With Quote
Old 07-16-2014, 09:12 AM   #4
AMDanBailer
Platinum Sponsor
 
AMDanBailer's Avatar
 
Join Date: Oct 2009
Vehicle: 2012 Boss 302
Location: PA
Posts: 2,269
americanmusclefb americanmuscle
Default

Quote:
Originally Posted by Rozay_palm View Post
hey guys first time posting
so ill try and make it short.so i have an 06 GT. Mods=full exhaust with longtubes,underdrive pullys, ford racing cold air, 4.10 gears, and tune.
after i installed my long tubes i had a lot of problems with my CEL alot of slow response codes. bama eventually fixed the problem. i thought.
i also replaced the 02S.
about a week ago the light came on again, this time for multiple misfire codes and multiple cylinder misfires. i thought it would be good to replace the plugs and coils(50k on engine) i cleared the codes and after two drive cycles the light was back on with only three codes a multiple mis and a cylinder 3

could it be as simple as a bad plug or coil? tune?
appreciate some help. thank you.
This could be a number of different things. I would recommend returning the car back to stock and see if the codes follow. If so, then we rule out the tune and can continue to troubleshoot what's going on here. That is the quickest/cheapest way to start!

We can also look into your tune for you to see if we notice anything out of the ordinary. Just give the Bama team a call and they'll gladly look into this for you! Our Bama Performance tuning specialists are here in the building Monday-Friday from 9AM-5:30PM EST and Saturday 9AM-5:30PM EST. You can hit them up directly at 888.226.9764 and they'll get you squared away!

-Dan
__________________
Dan Bailer | AmericanMuscle.com
Toll Free: 866.727.1266 | M-F 9AM-9PM EST | Sat 9AM-5:30PM EST
Bama Hotline: 888.226.9764 | M-F 9AM-5:30PM EST | Sat 9AM-5:30PM EST
GET UP TO $200 TOWARDS YOUR NEXT PURCHASE FROM AM!
Free Same-Day Shipping!
AMDanBailer is offline   Reply With Quote
Old 07-16-2014, 10:51 AM   #5
Rozay_palm
 
Join Date: Feb 2014
Vehicle: 2006 mustang gt
Location: Washington
Posts: 12
Default

i really appreciate the reply's.
Lethaldosage423. i never really felt a misfire, nor does it run bad right now. it has power and when i floor it, it doesn't seem to mis. but first i will mess with the tune and see what happens. also i will go over what you recommended. thank you!
Rozay_palm is offline   Reply With Quote
Old 07-16-2014, 11:37 PM   #6
Rozay_palm
 
Join Date: Feb 2014
Vehicle: 2006 mustang gt
Location: Washington
Posts: 12
Default

ok so i switched cylinder 3 and 1 and deleted the codes...
code came back on...when i got home i re flashed my car to stock. ran ****ty.
and the CEL came back.
the codes were...
oxygen sensor heater circuit 1 bank sensor 2
and back 2 sensor 2
bank 1 too lean
bank 2 too lean...
and it read the oxygen sensor codes twice
i had a total of 6
Rozay_palm is offline   Reply With Quote
Old 07-17-2014, 12:57 AM   #7
Rozay_palm
 
Join Date: Feb 2014
Vehicle: 2006 mustang gt
Location: Washington
Posts: 12
Default

also...do you think re tuning will at least make it run better?
Rozay_palm is offline   Reply With Quote
Old 07-17-2014, 01:24 AM   #8
808muscle
5th Gear Member
 
808muscle's Avatar
 
Join Date: Oct 2009
Vehicle: 2006 Mustang GT
Location: Maui
Posts: 4,612
Default

Sounds like some sort of air or vacuum leak. Check all around your cai, something is leaking there. Aftermarket coils suck. Stick with the stockers.
__________________


06 Satin Silver GT - Auto...ROUSH M90 CAI, Afco Dual Fan HE, 4.10s,Trutrac, Detroit Rockers, Moroso, DSS DS, TCI Rachet Shifter, PA Deep Pan, Eibach Handling, FR P Springs, Strange Shocks/Struts, BMR, J&M, SS Lines/ EBC Rotors w/Reds, Mickey Thompson SC5, Nitto 255/305, 2011 leather, Pypes LT's/H-Pipe, MBRP Resonators, Borla

2014 Pro Street 12.90 Class...Season Points Runner Up
12.23@114
808muscle is offline   Reply With Quote
Old 07-17-2014, 09:51 PM   #9
Lethaldosage423
4th Gear Member
 
Lethaldosage423's Avatar
 
Join Date: Apr 2008
Vehicle: 05 DodgeRam 2500 CUMMINS
Location: Southern California
Posts: 1,603
christob90
Default

did you run your car without the tune and it ran poor?

you should re upload your tune. if you have an intake and headers, it will only run properly with the tune.

so no more misfire codes?
like 808 said, sounds like a vacuum leak.
do you have a scanner that will read a live data? you could use that to check the ranges of your 02 sensors and compare them to bank 1 to see if any are out of range.

A lean code will quite often trigger an 02 sensor code.

also
i see you have a cold air intake.
is it an oiled filter?
is there too much oil on it.
a very common cause of system too leak bank 1 system too lean bank 2 is the mass air flow sensor. A lot of people over oil their air filters and the oil gets on to the tiny sensor element causing incorrect readings.

sorry for all the possible scenarios, its difficult to diagnose without the car.

With the engine running, do you hear any hissing sounds?
get yourself a can of carb or brake cleaner. with the engine running, spray a small amount round the intake manifold and vacuum lines. does the idle change at all? if yes then you have a vacuum leak. This is kinda a shady test. the proper way to check for a vacuum leak is with a smoke machine but they are pricey! Just be careful with the brake cleaner, its HIGHLY flammable.

Let me know what you find
__________________
2014 black Mustang5.0 track package, Recaros.
Roush axle back with 4.5 tips /Boss diffuser
Jlt can
Airraid+Bama 91
Barton twin post shifter bracket
Whiteline adjustable sway bar
Whiteline lower control arm relocation brackets
Whiteline adjustable lower control arms

05 white Mustang 4.0 sold
05 white Dodge 2500 Cummins sold and missed

Last edited by Lethaldosage423; 07-17-2014 at 09:52 PM. Reason: profanity lol
Lethaldosage423 is offline   Reply With Quote
Old 07-18-2014, 04:24 PM   #10
Rozay_palm
 
Join Date: Feb 2014
Vehicle: 2006 mustang gt
Location: Washington
Posts: 12
Default

well i didnt get to post this yesturday but, i did re-tune the car. after i tuned it i drove it for 20 plus miles and no codes yet..
so im thinkign it was just that, i will post again if something new happens.
so far so good!
thanks for all the help.
Rozay_palm is offline   Reply With Quote
Old 07-18-2014, 09:03 PM   #11
Rozay_palm
 
Join Date: Feb 2014
Vehicle: 2006 mustang gt
Location: Washington
Posts: 12
Default

so after work today it came on and started flashing and i lost power....
i got home i scanned the car and it was again a misfire code, cylinder 3 and 5 misfire
i check coils 5 and 6, both making the snapping noise, i checked the fuel injectors they all feel and seem to be working (there ticking) i then check the cai and did notice that the actual filter was loose. its a none oil filter. im going to do a compression test tomorrow to count that out(hopefully) so maybe tightening the air filter down will help....

i also went over the vacuum lines and didnt see or hear anything, i will double check with brake clean
Rozay_palm is offline   Reply With Quote
Old 07-19-2014, 11:54 AM   #12
Lethaldosage423
4th Gear Member
 
Lethaldosage423's Avatar
 
Join Date: Apr 2008
Vehicle: 05 DodgeRam 2500 CUMMINS
Location: Southern California
Posts: 1,603
christob90
Default

Quote:
Originally Posted by Rozay_palm View Post
so after work today it came on and started flashing and i lost power....
i got home i scanned the car and it was again a misfire code, cylinder 3 and 5 misfire
i check coils 5 and 6, both making the snapping noise, i checked the fuel injectors they all feel and seem to be working (there ticking) i then check the cai and did notice that the actual filter was loose. its a none oil filter. im going to do a compression test tomorrow to count that out(hopefully) so maybe tightening the air filter down will help....

i also went over the vacuum lines and didnt see or hear anything, i will double check with brake clean
the loose air filter may be part of the issue. it would be sucking in way more air causing it to run lean. Fingers crossed. ket us know how the compression test goes
__________________
2014 black Mustang5.0 track package, Recaros.
Roush axle back with 4.5 tips /Boss diffuser
Jlt can
Airraid+Bama 91
Barton twin post shifter bracket
Whiteline adjustable sway bar
Whiteline lower control arm relocation brackets
Whiteline adjustable lower control arms

05 white Mustang 4.0 sold
05 white Dodge 2500 Cummins sold and missed
Lethaldosage423 is offline   Reply With Quote
Old 07-19-2014, 05:26 PM   #13
bl817
1st Gear Member
 
Join Date: Apr 2010
Vehicle: 2005 Ford Mustang GT
Location: Ft. Worth Tx
Posts: 114
Default

there is also a TSB for misfiring issue after changing plugs. not sure the number, but I do remember reading that the ecm needs reflashed with newer code? ive been thinking of having this done but things are running fine for now.
here is a list of TSBs you can browse thru. credit for list to other forum. good luck

http://www.stangpit.com/info/tsbs-fo...2009-mustangs/
bl817 is offline   Reply With Quote
Old 07-21-2014, 07:58 PM   #14
Rozay_palm
 
Join Date: Feb 2014
Vehicle: 2006 mustang gt
Location: Washington
Posts: 12
Default

ok its back...


so after i re-tuned it, i got on it and the misfire code came back. i deleted it drove it again, then a cylinder 4 mis came up...

i decided to have one of my good buddies/mechanic check it out. we did comp test-good

check for vacuum leaks- none

he did see on the modus that is was missing but we couldn't find anything causing it.

he told me too try a different tune, one before the mis happened. it worked for a while came back today, first as a multiple, then cylinders 3 and 5.

my buddy is thinking its the camshaft position sensor. i think thats what ill do next. what do you think?

i just don't know what else it could be.

i also read that alternators can cause a misfire as well. any thoughts??
Rozay_palm is offline   Reply With Quote
Old 07-23-2014, 08:34 PM   #15
Rozay_palm
 
Join Date: Feb 2014
Vehicle: 2006 mustang gt
Location: Washington
Posts: 12
Default

this is ridiculous...

replaced both CPS today, drove it felt fine no miss. then i left work got on it and it popped, i couldnt feel a miss. scanned the code now its only a clyinder 3 miss.

i cleared it, see what happens. maybe crank sensor??

this is frustrating
Rozay_palm is offline   Reply With Quote
Old 07-23-2014, 09:41 PM   #16
Lethaldosage423
4th Gear Member
 
Lethaldosage423's Avatar
 
Join Date: Apr 2008
Vehicle: 05 DodgeRam 2500 CUMMINS
Location: Southern California
Posts: 1,603
christob90
Default

the alternators can throw out a cam sensor code, i know it sounds peculiar but you don't seem to have that code.
If the crank sensor or cam sensors were bad, the usual symptom is cranking with no start. you've definitely got a strange one. are you sure you used the correct spark plugs? You could also have carbon buildup on a valve causing a slight miss.
now you need to see if the coil is getting power all the time. its hard to test. it could be getting a faulty signal from the ECU and a new ECU may be the fix, but thats usually a last resort. Sorry i can't be of more help but please let us know what you decide to do. and of course don't hesitate to ask questions.
__________________
2014 black Mustang5.0 track package, Recaros.
Roush axle back with 4.5 tips /Boss diffuser
Jlt can
Airraid+Bama 91
Barton twin post shifter bracket
Whiteline adjustable sway bar
Whiteline lower control arm relocation brackets
Whiteline adjustable lower control arms

05 white Mustang 4.0 sold
05 white Dodge 2500 Cummins sold and missed
Lethaldosage423 is offline   Reply With Quote
Old 07-24-2014, 11:09 AM   #17
Rozay_palm
 
Join Date: Feb 2014
Vehicle: 2006 mustang gt
Location: Washington
Posts: 12
Default

i get all my parts from american muscle. they were stock motorcraft plugs (maybe thats the problem) and another thing is that it only seems to mis on cold start up at low idle. idk if that helps.

im going to have another mechanic look at. see what he thinks.

ill keep you up to date. thank you
Rozay_palm is offline   Reply With Quote
Old 08-14-2014, 06:27 PM   #18
Rozay_palm
 
Join Date: Feb 2014
Vehicle: 2006 mustang gt
Location: Washington
Posts: 12
Default

just thought i would let everyone know, i got the problem fixed!!!

the alternator was cause. it was putting out about 13.1-13.3 volts
took the pullys off to see if it would go up more. it didnt. replaced the alt. went up too 14.2, havent seen the light since.

thanks for the help guys!
Rozay_palm is offline   Reply With Quote
Old 08-14-2014, 07:37 PM   #19
Nuke
6th Gear Member
 
Nuke's Avatar
 
Join Date: Jun 2007
Vehicle: 2007 GT
Location: PA to KY ('07) to IL ('09) to MS ('10) to FL ('11)
Posts: 16,109
Send a message via AIM to Nuke Send a message via Yahoo to Nuke Send a message via Skype™ to Nuke
Default

The OE alternator has been a chronic issue with these S197's. Glad you found the problem... finally.
__________________
Rick
07 GT Prem: Alloy, MT, 3.55's, Steeda CAI w/Brenspeed tunes, FRPP Stingers, 275/40/18 Goodyear Eagle F1 A/S on SVT Cobras (OE GT500's), 14" shorty, Wheelskin side scoops & qtr window louvers, A-H rear window louvers, SHR honeycomb blackout panel, Sequentials, Hella Optilux Extreme XY fogs, Silverstars
06 V6: Legend Lime, Pony Package, 14" shorty, Sequentials, Hella Optilux Extreme XY fogs, Silverstars
Nuke is offline   Reply With Quote
Old 08-14-2014, 07:37 PM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 07:35 PM.

© Internet Brands, Inc.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup