Civic-EG.com Forum 3.3.1

- Sun Mar 01, 2009 6:25 pm #99683 I recently upgraded to a obd2 setup and have no need for my p28. I listed it on craigslist ($130)and got a ton of emails the same day.I've been looking around on the forum to try and figure out why it was so desirable despite the obvious that it is vtec.Whats the deal with the p28?Can anyone recommend a good guide or book?

[teal_dx]

- Sun Mar 01, 2009 7:41 pm #99696 people want it for a mini-me setup or to chip to run Crome, neptune ectune etc...

They usually go for about $100 around here, you made a good sale

Do Not PM me your technical questions. Post them in the forum!
My 1992 SOHC Turbo Hatch
My Youtube Channel: 6th Gear Garage

- Mon Mar 02, 2009 3:09 am #99825 Thanks

- Mon Mar 02, 2009 4:23 pm #99914 OBD1 is a million times better than OBD2 because the maps can easily be edited for performance, economy or whatever.
OBD2 ecus require a 'piggy back' module that 'tricks' the ecu into thinking every thing is 'normal' while adjusting the fuel and ignition behind the ecu's back.

p28's control vtec, and are easily chipped
p06's can easily be converted to p28's as most have the same circuit board

- Mon Mar 02, 2009 8:53 pm #99985 Ok what would I need to do to convert my car back to obd1? I've seen the harness adapters for my harness to a obd1 computer. But wouldn't I need to swap out injectors and all that good stuff.

- Tue Mar 03, 2009 4:42 pm #100152 it depends what was converted in the first place.
just the harness to a p2p ecu?
or did you do a complete y8 swap?

- Tue Mar 03, 2009 4:44 pm #100153 Do you like Digimon?

- Tue Mar 03, 2009 6:58 pm #100248 I did the full swap obd2 ecu ing/dist the whole nine yards

- Wed Mar 04, 2009 4:09 pm #100514 uh... what motor?
if you have a y8 i would just leave it obd2.
and sell it...

- Sun Mar 08, 2009 9:29 am #101394 to convert back, all you need is a P28 and an OBD2-OBD1 ECU Conversion harness.

[suspendedHatch]

- Sun Mar 08, 2009 7:58 pm #101468 Why on earth would you want to convert back?!! If you have an OBD2 engine, then an OBD2 conversion is ideal. The OBD1 maps are very very different and I have yet to see or hear of any competent tuner for OBD2 D series engines.

It would make no sense. You have the correct ECU, but you want to put the wrong one in and then get it "fixed" to be able to run your engine correctly.

Buy yourself a cheap OBD2 scanner and enjoy the diagnostic capability. It will always tell you exactly what's wrong.

- Sat Mar 14, 2009 2:28 pm #103159 I recently replaced my d15 for a b16 I bought a p28 ecu and just found out its for an automatic is this going affect the way the motor runs

- Sat Mar 14, 2009 2:49 pm #103170

I recently replaced my d15 for a b16 I bought a p28 ecu and just found out its for an automatic is this going affect the way the motor runs

you should probably check out the SWEET DIY from teal_dx on how your convert an auito p28 to a manual p28. it doesnt look too hard. http://www.civic-eg.com/forum/viewtopic.php?t=963

Enjoy!

don't get butt-hurt dude... it's the internet

- Sat Mar 14, 2009 6:23 pm #103202

I recently replaced my d15 for a b16 I bought a p28 ecu and just found out its for an automatic is this going affect the way the motor runs

you might get a cel but it will run ok
if you want to convert it from auto to manual is very easy.
remove R17 and jumper R18.