Well my sister just bought a 88 Crx Si witha b16a in it. She is running a pr3 ecu in it. Just wondering if the stock redline is at 7k cause thats what it is cutting out at. And if this is stock what ecu can we run that will let her run to 8k. Dnt really want to do a conversion harness, unless it comes down to it.

 

were did you get the ecu?is it from an automatic? if so u might want to get it chipped.i have a chipped auto ecu and it works just fine.

 

Dont know where the ECU came from, But i dnt think its an auto, cause it dosent throw any CELS, bough the car with the swap.

 

check to see if its auto..
After the pr3 it has more digits..It should read 1232-pr3-???

5spd digits are 000 001 002 A00 A01 A10 J00 J001 C01 C00
Auto digits are J51 J50 A50 A51 900 901 A60 C50 C51 X30 A80

 

that redline is low..

silly question: you sure the cluster not just maxing out and the engines still going?

my current ecu is chipped, but my stock one revved past 8k at least.

 

hmm to tell you the truth im not even sure of the physical differences in the ecu's either,(bewteen auto and manule pr3 ecu's) mine has auto written right accross the top with a chalk pen from when it was shipped from whomever had it before me.i would just use the nifty *search* button and im absolutely sure you will find your info.it located directly at the top right hand corner of your page.good luck

 

Yea it fuel cuts at 7, and i doubt the tach is off by 1k. But i will check the numbers on the ecus, also If it is auto then would nt it be throwing codes, since its not senseing the automatic sensors?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PHOBIA &raquo;</TD></TR><TR><TD CLASS="quote">hmm to tell you the truth im not even sure of the physical differences in the ecu's either,(bewteen auto and manule pr3 ecu's) mine has auto written right accross the top with a chalk pen from when it was shipped from whomever had it before me.i would just use the nifty *search* button and im absolutely sure you will find your info.it located directly at the top right hand corner of your page.good luck</TD></TR></TABLE>
Yea i know where the search button is, i did a search and im sitting right next to SOHCVTEC1995 which has over 2500 post, so i know how to work the site. But thanks for the input anyways.

 

Since ypu possibly have an auto ecu you might also have a automatic b16. I read that the auto b16's have a single intake valve spring and the manual b16's have a dual intake spring. Something to check if you plan on revving to 8k.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eda6 &raquo;</TD></TR><TR><TD CLASS="quote">Since ypu possibly have an auto ecu you might also have a automatic b16. I read that the auto b16's have a single intake valve spring and the manual b16's have a dual intake spring. Something to check if you plan on revving to 8k. </TD></TR></TABLE>
So if it is an auto is there any other way of confirming it? Also is there any other ECU that can be used, without chipping or getting a conversion harness?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sohcvtec1995 &raquo;</TD></TR><TR><TD CLASS="quote">
So if it is an auto is there any other way of confirming it??</TD></TR></TABLE>

See my post above..^^^^^^^

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sohcvtec1995 &raquo;</TD></TR><TR><TD CLASS="quote">Also is there any other ECU that can be used, without chipping or getting a conversion harness</TD></TR></TABLE>

You can use a manual pr3 or pw0..

 

are you throwing any codes...knock sensor wired up...vtec oil pressure sensor...get it chipped this problem is common with cars which are wired wrong just get it chipped and you will be fine...and using a certain pw0's will worsen your problem because that computer is looking for a knock sensor a pr3 is not just get a pr3 http://b20vtec.com/forums/show...23412


Modified by jerZeyReX at 1:38 AM 12/14/2004

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jerZeyReX &raquo;</TD></TR><TR><TD CLASS="quote">are you throwing any codes...knock sensor wired up...vtec oil pressure sensor...get it chipped this problem is common with cars which are wired wrong just get it chipped and you will be fine...and using a certain pw0's will worsen your problem because that computer is looking for a knock sensor a pr3 is not just get a pr3 http://b20vtec.com/forums/show...23412


Modified by jerZeyReX at 1:38 AM 12/14/2004</TD></TR></TABLE>
No codes at all. also it seems as if vtec is engaging at 5k, is that right? cause i always thought that dual cams engaged around 5.5k. also when vtec opens you can hear it but you cant feel it.

 

Bump for more responese, this is going to be her auto cross car, and we need it running right.

 

maybe she has a auto PR3 ecu. what are the #'s on the side of the ecu? IMO I would convert to OBD1. car runs lots better and gets better gas mileage for normal driving.

 

vtec is 5.5k ur right.trust me getting that ecu chipped is a lot less hassle and cheaper than your other options.

 

If its hitting fuel cut off in 5th gear its normal, it just the speed limiter. Just get the ecu chipped, it will fix the problem.

 

Pull the top cover off and look for;
Auto ecu says AT:

Or manual ecu says MT;


You can use a mirror and and flashlight to see
if it has dual valve springs or not.

 

Mine redlined at 7k when i had CEL

 

sweet i just checked my ecu and it says mt.....whew close one haha

 

pr3 ecu engages vtec at 4800 this is confirmed with my vafc,

like everyone else said, you possible have a auto ecu, supposedly you can convert it to 5sp buy changing a jumper on the ecu, i might search about it tommorow, but that will depend on how nice im feeling about it

 

it shouldn't be that low. vtec should engage on a pr3 around 5200 rpm.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slowpokesi &raquo;</TD></TR><TR><TD CLASS="quote">pr3 ecu engages vtec at 4800 this is confirmed with my vafc,
</TD></TR></TABLE>

Did you buy it used ? See I'm not to sure about the vtec engagement, people say 5,300 and some say 4,800, I have the manual and I swear it says 5,300. Let me look it over.

 

My pr3 had vtec at 4800 until i chipped it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eda6 &raquo;</TD></TR><TR><TD CLASS="quote">My pr3 had vtec at 4800 until i chipped it.</TD></TR></TABLE>

hmm well this is straight from the manual