SP542 plugs: A solution, or avoiding finding the problem?

[Macgyver]

Hair plugs, yes.  Spark plugs, no.  No SHO, no need LOL.  It just seems like more people have chosen this as a goto for the very real issue of KR, so I am trying to ascertain if this is a viable longterm solution that does not end up creating another problem in the process.  Treating the symptom vs the cause kind of thing.

That was my point on my above post. How many have fuel issues that the 542's seem to fix. Yeah I know that is a fix but when one motor does not need 542's because their 93 is great.......

KR is KR.

[ZSHO]

I noticed today after cold morning startup that the idle would settle @ 500-rpm with much added smoothness.... 
The only time it would idle @ 500-rpm would be in Stock Tune IIRC!
In the past it would always hover above 700-750 rpm while being Tuned!  Z 

[SHOdded]

Is that enough RPM to drive the accessories at idle?

Interesting they de-rated the alternator starting partway through the 2014 MY
Generator (3.5L GTDI, early production) 
Rating  200 amps 
Output  109/191 amps (max) @ 600-2,000 engine rpm 
Pulley ratio  2.66:1 

Generator (3.5L GTDI, late production) 
Rating  175 amps 
Output  88/175 amps (max) @ 600-2,000 engine rpm 

Generator (Police) 
Rating  220 amps 
Output  103/217 amps (max) @ 600-2,000 engine rpm 
Pulley ratio  2.67:1 

Ford DG1Z-10346-B    
Alternator Assy
200 Amp
Fit Note:   Heavy Duty Alternator, Standard Duty Alternator
Fitting Vehicle Options:   (-) Police Version
Base Number:   10346
Callout Name:   10346
$565.36 $465.02
1
Ford DG1Z-10346-C    
Alternator Assy
220 Amp
Fit Note:   Extra Heavy Duty Alternator
Fitting Vehicle Options:   Police
Base Number:   10346
Callout Name:   10346
Replaced by:   GB5Z-10346-C
$781.29 $543.38
1
Ford DG1Z-10346-F    
Alternator Assy
175 AMP
Fit Note:   Heavy Duty Alternator, Standard Duty Alternator
Fitting Vehicle Options:   (-) Police Version
Base Number:   10346
Callout Name:   10346
$398.73 $350.07

[ZSHO]

Is that enough RPM to drive the accessories at idle?

Interesting they de-rated the alternator starting partway through the 2014 MY
Generator (3.5L GTDI, early production) 
Rating  200 amps 
Output  109/191 amps (max) @ 600-2,000 engine rpm 
Pulley ratio  2.66:1 
Generator (3.5L GTDI, late production) 
Rating  175 amps 
Output  88/175 amps (max) @ 600-2,000 engine rpm

Interesting indeed! The 2013MY alternator is rated @ 220 amps with a Build date of 11/12 IIRC!  Z

[ZSHO]

The idle in park has been hovering @ 600-650 rpm as if late!
I am hoping other members will contribute to this Topic!  TIA. Z   

[StealBlueSho]

The Rpm has been @ 600-650 rpm as if late!
I am hoping other members will contribute to this Topic!  TIA. Z   

That's where rpms sit when in drive. In park is slightly lower.


Sent from my iPhone using Tapatalk

[ZSHO]

The Rpm has been @ 600-650 rpm as if late!
I am hoping other members will contribute to this Topic!  TIA. Z   

That's where rpms sit when in drive. In park is slightly lower.


Sent from my iPhone using Tapatalk

I will check to see in Drive.
Edit - basically same here, thanks.  Z

[StealBlueSho]

The Rpm has been @ 600-650 rpm as if late!
I am hoping other members will contribute to this Topic!  TIA. Z   

That's where rpms sit when in drive. In park is slightly lower.


Sent from my iPhone using Tapatalk

I will check to see in Drive.
Edit - basically same here, thanks.  Z

Interestingly enough... in the mycalibrator there was a PID (it has since been removed) that was labled "Desired RPM at IDLE"... LMS has this set to 600 RPMs based on the information from the tuning device.