mystery problem with my mustang please help techs
06-27-2007, 01:22 AM
#11
4th Gear Member
Join Date: Jun 2007
Location: Cumberland County NJ
Posts: 1,369
RE: mystery problem with my mustang please help techs
thats why i asked him if it was poping out the exhuast or intake. if its poping out the intake i would think timing. but from what it sounds like he's saying is that when he drives and stops at a gas station and shuts his car off to get gas. And starts it again. and its poping and makingit hard to start is making methink that possibly an injector is bleeding down flooding his engine.
06-27-2007, 01:27 AM
#12
3rd Gear Member
Join Date: Nov 2006
Location:
Posts: 641
RE: mystery problem with my mustang please help techs
ORIGINAL: oxfordgt
I didnt think of that.
ORIGINAL: blackstallion666
If the car runs fine after you get it started again. I think you may have a fuel injector intermitantly leaking down and flooding a cyl of the engine causing it to pop, and making it hard to start.
If the car runs fine after you get it started again. I think you may have a fuel injector intermitantly leaking down and flooding a cyl of the engine causing it to pop, and making it hard to start.
p0340indicates that a problem was detected in the camshaft position sensor circuit. Since it says circuit, that means the problem couldbe in any part of the circuit. The sensor itself, the wiring, or the PCM malfunctioning could throw the code. Don't just replace the cps and think that will definitely fix it.A wire or connector in the circuit could be grounded, shorted or broken.
06-27-2007, 01:34 AM
#13
4th Gear Member
Join Date: Jun 2007
Location: Cumberland County NJ
Posts: 1,369
RE: mystery problem with my mustang please help techs
ORIGINAL: LetThePoniesRunFree
It's not going to throw a p0340 for that though.
p0340indicates that a problem was detected in the camshaft position sensor circuit. Since it says circuit, that means the problem couldbe in any part of the circuit. The sensor itself, the wiring, or the PCM malfunctioning could throw the code. Don't just replace the cps and think that will definitely fix it.A wire or connector in the circuit could be grounded, shorted or broken.
ORIGINAL: oxfordgt
I didnt think of that.
ORIGINAL: blackstallion666
If the car runs fine after you get it started again. I think you may have a fuel injector intermitantly leaking down and flooding a cyl of the engine causing it to pop, and making it hard to start.
If the car runs fine after you get it started again. I think you may have a fuel injector intermitantly leaking down and flooding a cyl of the engine causing it to pop, and making it hard to start.
p0340indicates that a problem was detected in the camshaft position sensor circuit. Since it says circuit, that means the problem couldbe in any part of the circuit. The sensor itself, the wiring, or the PCM malfunctioning could throw the code. Don't just replace the cps and think that will definitely fix it.A wire or connector in the circuit could be grounded, shorted or broken.
06-27-2007, 01:38 AM
#14
6th Gear Member
Join Date: May 2006
Location: Ohio
Posts: 6,448
RE: mystery problem with my mustang please help techs
Could be any of these that throw that code.[*]CMP circuit open.[*]CMP circuit short to GND.[*]CMP circuit short to PWR.[*]SIG RTN open (VR sensor).[*]CMP GND open (Hall-effect sensor).[*]CMP incorrectly installed (Hall-effect sensor).[*]Damaged CMP sensor shielding.[*]Damaged CMP sensor.[*]Damaged PCM.
Check all of these: harness routing, harness alterations, improper shielding, or electrical interference from other improperly functioning systems may have an intermittent impact on the CMP signal.
Check all of these: harness routing, harness alterations, improper shielding, or electrical interference from other improperly functioning systems may have an intermittent impact on the CMP signal.
06-27-2007, 01:42 AM
#16
3rd Gear Member
Join Date: Nov 2006
Location:
Posts: 641
RE: mystery problem with my mustang please help techs
ORIGINAL: blackstallion666
ORIGINAL: LetThePoniesRunFree
It's not going to throw a p0340 for that though.
p0340indicates that a problem was detected in the camshaft position sensor circuit. Since it says circuit, that means the problem couldbe in any part of the circuit. The sensor itself, the wiring, or the PCM malfunctioning could throw the code. Don't just replace the cps and think that will definitely fix it.A wire or connector in the circuit could be grounded, shorted or broken.
This is true but it doesn't mean that there's not possibly something else causing his problem
ORIGINAL: oxfordgt
I didnt think of that.
ORIGINAL: blackstallion666
If the car runs fine after you get it started again. I think you may have a fuel injector intermitantly leaking down and flooding a cyl of the engine causing it to pop, and making it hard to start.
If the car runs fine after you get it started again. I think you may have a fuel injector intermitantly leaking down and flooding a cyl of the engine causing it to pop, and making it hard to start.
p0340indicates that a problem was detected in the camshaft position sensor circuit. Since it says circuit, that means the problem couldbe in any part of the circuit. The sensor itself, the wiring, or the PCM malfunctioning could throw the code. Don't just replace the cps and think that will definitely fix it.A wire or connector in the circuit could be grounded, shorted or broken.
This is true but it doesn't mean that there's not possibly something else causing his problem
I still lean towards a short/bad connection in the CPS circuit.
06-27-2007, 01:45 AM
#17
4th Gear Member
Join Date: Jun 2007
Location: Cumberland County NJ
Posts: 1,369
RE: mystery problem with my mustang please help techs
now the question is. Was the new sensor installed a ford sensor. If it was a sensor from a parts store down the street.It may not be the correct size and not providing them proper gap between the sensor and the trigger wheel. another possibility
06-27-2007, 02:25 PM
#18
5th Gear Member
Join Date: Jan 2006
Posts: 2,504
RE: mystery problem with my mustang please help techs
i got your pm
the problem is with the alternator. something internally, a diode i think goesbad in the alt. which causes it to electro-magnetically intereferewith the cps......especially since they are both on the same harness( and the cps is a halls effect [magnetic] sensor), so now the pcm thinksthat the cps is out of whack, hence the p0340 code
the carbackfires on start up because the pcm doesn't know where the camshaft is so now the injectors are out of sync which is why it would appear to be a timing issue at first glance. believe me, this code gave me hell to figure out since the mechanics weren't much help, one guy even laughed when i told him i wasgoing toput a new alternator in
the problem is with the alternator. something internally, a diode i think goesbad in the alt. which causes it to electro-magnetically intereferewith the cps......especially since they are both on the same harness( and the cps is a halls effect [magnetic] sensor), so now the pcm thinksthat the cps is out of whack, hence the p0340 code
the carbackfires on start up because the pcm doesn't know where the camshaft is so now the injectors are out of sync which is why it would appear to be a timing issue at first glance. believe me, this code gave me hell to figure out since the mechanics weren't much help, one guy even laughed when i told him i wasgoing toput a new alternator in
06-27-2007, 03:32 PM
#19
corner carver
Join Date: Oct 2006
Location: New England
Posts: 4,371
RE: mystery problem with my mustang please help techs
ORIGINAL: Brute03
i got your pm
the problem is with the alternator. something internally, a diode i think goesbad in the alt. which causes it to electro-magnetically intereferewith the cps......especially since they are both on the same harness( and the cps is a halls effect [magnetic] sensor), so now the pcm thinksthat the cps is out of whack, hence the p0340 code
the carbackfires on start up because the pcm doesn't know where the camshaft is so now the injectors are out of sync which is why it would appear to be a timing issue at first glance. believe me, this code gave me hell to figure out since the mechanics weren't much help, one guy even laughed when i told him i wasgoing toput a new alternator in
i got your pm
the problem is with the alternator. something internally, a diode i think goesbad in the alt. which causes it to electro-magnetically intereferewith the cps......especially since they are both on the same harness( and the cps is a halls effect [magnetic] sensor), so now the pcm thinksthat the cps is out of whack, hence the p0340 code
the carbackfires on start up because the pcm doesn't know where the camshaft is so now the injectors are out of sync which is why it would appear to be a timing issue at first glance. believe me, this code gave me hell to figure out since the mechanics weren't much help, one guy even laughed when i told him i wasgoing toput a new alternator in