I hope someone can help with a couple of questions ive got regarding cossie managment.

I own a 2wd Saph and needed a mappable ecu and it was recomended to me that i got a P8 from an Esc Cos. It arrived in the post this morning from a friend of a friend. I opened up the ECU and found that it seemd to be missing the chip. One person tells me that it doesnt need a chip and another tells me that i need a chip or even a pectel board that plugs into the space instead.

Any ideas??


Question 2: I know that i have to swap 2 wires on the throttle possision sensor for the P8 to work propperly, but does anyone know what wires they are??


Thankyou all in advance!!

Paul

 

yes you need a chip and baby board

the two wires to swap are top and bottom, leave middle

 

ah, ok.

Any idea where i can pick up the missing bits?

 

stu at msd, on here

 

nice one!!

Have you got his email address or another way of contacting him?

 

how do you want your ecu to be mappable?

by yourself or someone else that doesn't have all the necessary equipment like an emulator and stuff that costs thousands? becuase that's what P8 needs.

and you can't just swap the wires to the TPS, you need the correct TPS too. PF09 from 4x4 models or large turbo escos.

 

I'm not mapping it myself!!! Ha ha ha! Its booked with Track n Road Essex next month. Im just trying to sort out all the bits now the head and cams are back.

I didnt realise i needed a TPS from the 4x4 tho. I'll order one in the morning.

 

sorry for the wrong info on tps

nick does this apply to the L8 aswell?

 

yes. you must have the correct TPS for the ecu. for L8 and P8, that means PF09.

not only does PF09 work the opposite way around to PF01 (for L1 & L6), but it has an additional point on the resistance track at one end - can't remember which, but it's so the ecu knows you've either got WOT or idle.

 

Ah so ecu senses this point and shuts off fuel correct or not?

 

so i still need to swap the 2 wires on the TPS loom even if i use a P8 with a PF09?

 

I would say yes but foreigneRS will reply later

 

not quite. if i could remember which way around it is, i could tell you

you got it

 

To fit a L8 or P8 to a 2wd loom requires the top and bottom wires on the TPS plug reversing. This is because the 4wd looms are wired inverse to the 2wd's.

The PF09 sensor also requires fitting in place of the PF01. This is because the PF01 is open circuit at idle which is what the L1 and 6 ecus look for to activate idle and overun strategies, where as the L8 and P8 look for a small resistance, which is what the PF09 outputs at idle. The later ecu's will see open circuit as a TPS error and drop into LOS.

The P8 internally has no babyboard at all as standard. Your mapper will supply the chip that contains your run software and if he requires encryption will also supply you an encryption babyboard, so you have nothing further to worry about. Enjoy your mapping day.

Hope this helps.

 

nice one stu, that's cleared that up properly

 

Nice explanation Stu. As an aside, a long long time ago I spoke to a guy in the technical dept at Webcon (he faxed me the specs for the two types of sensor) and he said the two were interchangeable with the wire swaps! What chance have us mere mortals got if the manufacturers get it wrong???

 

they are machanically interchangable, but it depends on the ecu that they are connected to as to whether they work electrically or not....

as mentioned above, you can use an newer ecu with an old style loom with new tps as long as the puter 2 wires are swapped

 

Typical isnt it. It should be plainly obvious from teh sensor sweep that one is open circuit at rest too.

 

Thats made it propper clear now!! Thanks guys!!

One more thing, Ive managed to find a baby board for the P8 with ALS. I like the idea of anti-lag for track days and showing off, but how do you make it switchable as it clealy not worth running anti-lag while sitting in traffic??

Paul

 

it is switchable, IIRC you either earth or put 12v to pin 12 of the ecu to enable /disable the ALS, with the board fitted and the other necessary parts needed like new throttle body, new idle valve and a uprated turbo, but you would have to check

 

nice one!! Will give it a go!