cobra maf

krissZ89T · Post by **krissZ89T** » Sat May 10, 2008 5:03 am

hi,
Who can say to me the correspondence of connection enter the cobra maf and z31 maf? ABCDEF----ABCD
I have installed the nistune board in my ecu But must i to make another modif in my ecu so that it works with the cobra maf?
my car is a french 1989 300ZX turbo But my ecu is the one as americain model of 1987.
I have instaled also my walbro pump this after noon, also must i to make a modification in my ecu?
thanks
dscf1410ld8.jpg

krissZ89T · Post by **krissZ89T** » Sat May 10, 2008 5:05 am

sorry
dscf1410ld8.jpg

Matt · Post by **Matt** » Sun May 11, 2008 4:33 am

For that ECU see the software manual on the website under 'documents'

Section 14
Upgrading early model ECU MAF hardware. There are pictures on how to do the upgrade

*** We need to update this, since a 5.1 volt zener diode needs to also be added between the input signal and ground to limit the top voltage so it doesnt damage the A/D converter chip ***

I've made a note to get another picture added to this thread

For the Cobra conversion see Page 5 of the following
http://www.jimwolftechnology.com/wolfpd ... PGRADE.PDF

krissZ89T · Post by **krissZ89T** » Sun May 11, 2008 10:09 pm

thank you
it's ok for cobra maf connect,but not for upgrad my ECU.
the picture off ECU in NIStune Software Installation and Users Manual and in Type 1 Rev 3 Hardware Installation Manual Are not identical,my ecu is as american model 1987 but for upgrad it I have to follow the instructions section 14 for ecu on 1984-1986.
Would have he a person there who speaks francais to help me?

Matt · Post by **Matt** » Mon May 12, 2008 4:18 am

Same modification for your 1987 ECU

Also need 5.1 volt zener diode
http://www.altronics.com.au/index.asp?a ... m&id=Z0314

Software Users Manual Document updated tonight. Photo has been added

non bon parle francais

http://babelfish.altavista.com/tr

krissZ89T · Post by **krissZ89T** » Mon May 12, 2008 9:17 pm

ok,i'am go to make that : action chapiter 14 page 32 (remove pin 5 on.....remove pin1 on RHS and after solder a jumper and install in ECU a zener diode 5.1V as picture page 33 ok?
sorry matt but If I spoke English I shall disturb you less.

Matt · Post by **Matt** » Mon May 12, 2008 10:52 pm

Thats correct

No problems. It keeps the documentation up to scratch so everyone finds it easier as we go

Your English is better than my French

SupSay Z · Post by **SupSay Z** » Thu Jun 26, 2008 7:47 am

Hey Matt how is it going? so for the 88 ecu, where does the 5.1 volt zener diode go? do i put this in place of one of the resistors?

Matt · Post by **Matt** » Thu Jun 26, 2008 11:47 am

I've updated the software documentation the other week with photos of the zener diode. Please see the AFM page with updated pictures

SupSay Z · Post by **SupSay Z** » Sun Jul 06, 2008 2:04 am

hate to be a bother, but i am confused on this. i looked at the user manual, pg 32 which is the one that talks about the 87-89 ecu and i see no mention of the diode although it is there for the other ecu's.

Matt · Post by **Matt** » Sun Jul 06, 2008 3:31 pm

If you have the USDM ECU shown in the manual for 1987-89 then dont worry about the zener diode

The European 1988 ECUs are the same as the USDM 1986 style ECUs so need the same modifications

I'm looking at this particular mod right now, because on these earlier ECUs we are bypassing the opamp but I'm noticing that the lower end voltages are reporting a little off compared to what I'm measuring with the meter

SupSay Z · Post by **SupSay Z** » Mon Jul 07, 2008 8:20 am

thanx for the clarification.