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View Full Version : Calibrating Shift light, need to know PPR for our V6s



kenewagner
07-19-2010, 11:39 AM
To calibrate the shift light I need to know what the PPR (Pulses per revolutions) for the 3.8 V6 is. From the description it is how many times the ignition fires per revolution of the crankshaft. Anyone know that?????????? Appearantly the default is set at 4 for a V8


Ken

Quik95SC
07-19-2010, 11:51 AM
Ken,
This is what i came up with. I do believe it is 3 PPR for a 3.8L.
When you run the KOER test the check engine flashes 3 times when the test starts, also I founf this on a mustang forum, so I believe it to make sense and should be the same for our 3.8SC motors as well.

Ford 3.8L and 4.6L MUSTANGS
Tach output is obtained from PCM (powertrain control module) which is a 104 wire connector, and is located behind the passenger side kick panel. Look for pin number 48, which is usually an orange wire with a white stripe.

(3.8L is = 3 PPR; 4.6L is = 4 PPR)

Smitty

frdlvr30
07-19-2010, 03:21 PM
Ken,
This is what i came up with. I do believe it is 3 PPR for a 3.8L.
When you run the KOER test the check engine flashes 3 times when the test starts, also I founf this on a mustang forum, so I believe it to make sense and should be the same for our 3.8SC motors as well.

Ford 3.8L and 4.6L MUSTANGS
Tach output is obtained from PCM (powertrain control module) which is a 104 wire connector, and is located behind the passenger side kick panel. Look for pin number 48, which is usually an orange wire with a white stripe.

(3.8L is = 3 PPR; 4.6L is = 4 PPR)

Smitty

EEC-4 is a 60 pin EEC connector(OBDI). EEC-5 is a 104 pin connector (OBDII)....96 and up. With a few Exceptions, 1994-5 T-bird with the 4.6l. 1995 Windstar, and a SN-95 mustang 3.8 NA if my memory serves...

Quik95SC
07-19-2010, 03:57 PM
EEC-4 is a 60 pin EEC connector(OBDI). EEC-5 is a 104 pin connector (OBDII)....96 and up. With a few Exceptions, 1994-5 T-bird with the 4.6l. 1995 Windstar, and a SN-95 mustang 3.8 NA if my memory serves...

Understand the EEC Connector is different, I was only referring to the 3-PPR actually, nothing else really pertains to our vehicles.

Thanks for clarifying though.

Smitty

frdlvr30
07-19-2010, 04:10 PM
Understand the EEC Connector is different, I was only referring to the 3-PPR actually, nothing else really pertains to our vehicles.

Thanks for clarifying though.

Smitty

Oh copy and paste.....got ya....sorry...

07-19-2010, 05:51 PM
I just went through this today!

The pulse rate is 3 for our V6 3.8L SC engine. When set to the factory 4 the tach reading is off. Rest it to 3 and the reading is dead nuts.:D

By the way I picked up the tach signal in the instrument cluster Dark Green with Yellow stripe will get you the pusles your need. Otherwise you may have to go further for a signal.;)

96SCbird
07-19-2010, 09:23 PM
It's quite simple to figure out if you think about it. The tach needs to know how many spark firing events equals one revolution. For any engine with an even number of cylinders, half of them fire per revolution. So for 6 cylinders, 3 spark firing events is one revolution.