Difference between S4 and S5 engine?
#2
F**K THE SYSTEM!!
YOu should do a search but. I guess the eaiest way is by looking for the OPM.(oil metering pump)
If it is mechanical it is an s4. works with the throttle body.
If it is electronic it is an s5. There is no link between the throttle body and the metering pump(ecu controls it)
HOpe this helps.
If it is mechanical it is an s4. works with the throttle body.
If it is electronic it is an s5. There is no link between the throttle body and the metering pump(ecu controls it)
HOpe this helps.
#3
MECP Certified Installer
Look at where the BAC valve is. If it is on the drivers side attached to the dynamic chamber (plenum) then it is an S4. If it is underneath the intake snorkel on the passenger side, near the secondary fuel rail, it is S5.
Here is the BAC valve...
http://www.rotaryresponse.com/4sale/FC3S/BACTII.jpg
Here is the BAC valve...
http://www.rotaryresponse.com/4sale/FC3S/BACTII.jpg
#5
Trunk Ornament
iTrader: (11)
Yes. You look at the intake manifold, then smash your face into it.
I like this link: REALLY AWESOME THREAD!!!
It explains all the differences, and how to tell.
-Enjoy!
I like this link: REALLY AWESOME THREAD!!!
It explains all the differences, and how to tell.
-Enjoy!
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#11
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The easiest ways to tell:
S5 = Two TPS and an electrical MOP.
S4 = One TPS and a mechanical MOP.
(Yes... I say Metering Oil Pump, as stated in the FSM.)
Here is a good link...
Rotary Resurrection: Differences between 86-88 (S4) engines and 89-91 (S5) engines
#12
if you really want the true answers from someone whose had both engines in all chassis including 3's pm me prolly know your setup off the top of my head or you can follow my build and for that I would pm it to you otherwise this posting would be at 100 pages allready id run outa room
Last edited by l3thal_S5; 02-29-12 at 05:40 PM.
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