freeagent

ok so i bought a p28 ecu and i need to order the jumper harness from rywire to do the obd0 to obd1 conversion but on rywire it says its made for a pr4 will the p28 not work or just not work as well should i still get it idk what to do please help

freeagent

http://www.hondata.com/engines.html

ok so im gonna order it anyway i think it will work after lookin at this i have b18a1 and they are listed in the same little category thing..

91whiteREX

Also if you call them or e-mail they are very pleased to teell you what will work and what won't. Very nice to do business with!

freeagent

good to know i was gonna call but it said they were only there mon thru thurs.

hisnibs

The p28 will work, although you may need to get it chipped if you are not running the same engine as the car the ecu came from.

freeagent

is that expensive i dont think anyone around my area does this...also i was reading somewhere where they tested 3 different ecu's 2 diffferent stock ones and one chipped one and the stock ones performed better than the chipped one and also had horrible gas mileage. is that because they didnt know how to chip the ecu correctly??

grog

chipping can be done many ways. you could make custom tunes (more power worse gas mileage), or you can simply put another stock tune on the ecu making it virtually stock.
I believe you need a your ecu chipped with a P74 tune or sell/trade the P28 for a P74

freeagent

is the p74 what came with the motor? is there much power to be gained by chipping the p28? would it be an even trade for one or the other like is one worth more i got mine for seventy five idk if thats good but i was told thats what i needed what are th differnces between them what did they come out of??

theft24

i got one off ebay for 40 and it works fine...

LightWeightChamp

No such thing as a p74. He maybe meant PR4 or p75. Those are the b18b1 ecus. If you just plan on using it for a daily.. Buy a obd1 p75

LightWeightChamp

And you can just gain power by chipping a P28 . You would have to tune it... In your case it would just need a ls basemap burned onto it.

LightWeightChamp

Sorry I keep posting... Its easier to just make a new post then to edit a post from my phone.


Also you cant just buy the ecu+jumper harness to convert. You also need a obd1 ls distributor, and a 4wire o2 sensor

freeagent

lol ya sorry i havnt been very specific i have the obd1 dizzy for the ls and the harness comes with jumper for the dizzy and its wired for the four wire o2 sensor so it will be ok as long as i chip it? ...how much do people charge for that i havnt had ton of time to look into it who are some reputable people to do it? but one another question is, it will plug in to the harness for the pr4? and thanks guys yall are alotta help

freeagent

which one did you get?? is it an ls motor? same evrything or what?

D16SiHatch

two good sites for chipping services. you can also find reputable chipping available through some powersellers on eBay.

http://www.xenocron.com/
http://phearable.net/

If you're running a basically stock ls then theres no reason to chip an ecu at all. just run an obd1 pr4 or p75. lastly, if you have the ecu jumper then yes the obd1 pr4 will plug right in.

freeagent

ok i understand that but i already bought a p28 ecu...how do i make that one specifically work? i know i need to chip it but is that it? i dont have any more money to buy another ecu.

theft24

i was talking about the jumper harness i got my chiped ecu off of phearable, but heres the link to the jumper harnes i got, the guy went up in price but its pretty good quality and has pretty good instructions also
http://cgi.ebay.com/ebaymotors/New-E...#ht_1167wt_829

DCRB

ok bassically you have an ecu for a 1.6l vtec motor (p28). you have a b18a1, which is a 1.8l non vtec motor. yes you can use the p28 on the ls, but it will run lean, especialy as you get hire into the rpms. lean is bad. it causes detonation, which causes your engine to go BOOM.

so what you can do is have the p28 "chipped" (or re programed) for the b18 specs. this means you will replace the fuel maps from the 1.6l with the 1.8l fuel maps so you wont run lean, and you'll have the propper redline, and everything will work correctly

freeagent

ok so does any one have a pr4 or p75. ill trade i dont care how much they are worth so far my unaswered questions are will the pr4 harness fit to the p28? not will the pr4 plug into the pr4 harness.. also the xceron has a stock basemap for the b18 but it doesnt state that it will work for the p28 will it?

freeagent

ok so i called xenocron they helped alot answered all my questions thanks alot man

mr1320

ha

freeagent

fack ya couch.^^

mr1320

thats rude.