staticchmbr

my virgin p28 already has factory chips...what all do i have to replace? i know i have to replace the IC3 main chip for the socket...obviously, but what else? the C51 and C52 already have the ceramic disk, the J1 already has a jumper (which ill replace with the one in the kit), the IC4 already has a 74HC373N chip, and the R54 looks like it already has the correct resistor.
should i replace the stuff with what xenocron sent, or should i leave stock stuff in? also, he sent an enormous 35v capacitor, where does it go? i can't find it in any writeup of chipping...or is it for an obd0?

also with the datalogging piece, does it go in CN2 holes 1-4 or 2-5?

Adam Hopkins

You have to get the stock chip out and then put the socket in there. Other stuff leave alone. The datalogging goes from 1-4

SDRAWKCAB

http://www.phearable.net/images/ecusocketingins.gif

staticchmbr

thats what i thought..just didn't know if the supplied stuff was better for me. thanks!

Chris Harris

leave the stock stuff there...desolder the eprom and solder in the DIP socket.

staticchmbr

real quick, what was that 35v maroon/brown cylinder capacitor for?

zccr-xsi

listen to the man he knows what hes talking about.and if u have to ask what it is u shouldnt be installing the ZIF send it to xenocron.

f***myzc

It sends power to the main relay. They are known to go bad, thats why its sent with the kit. Replace it if you feel its needed.
It goes in spot C14 i believe. Near the ecu plugs.

staticchmbr

trust me, i know he knows what he's saying...thats why i buy all my ---- off him. i have been chipping ecu's for a while obd0 and obd1...just never came upon a factory chipped p28...and i dont remember the capacitor ever being included in the kits


anyways, maybe ill sell off the rest of the kit. paid $30 bucks for it, and apparently only need 2 peices from it...sucks for me!

zccr-xsi

wow really!i been doing it for 2 years and ive came acorss 4 factroy chiped obd1 ecus.2 p28s a pr4 and a p72.not sure way they did come factory chiped,considering ond1 had internal rom im thinking they needing more info then what then stock could hold and needed an extra rom.im not saying im just guessing.but if someone could shed a little light on the subect that would be great.since u u know how to chip an ecu just replace the chip with a zipthen zif and throw in the dataport and your good to go.and as for the part in c14 i got tons of them cause i dont replace it untill it blows or if its already blowen.