vpxaboi

SPECS:
1995 Honda Civic Coupe EX

Dropped in:
B16A2 Motor
GSR Tranny
P72 Skunk Chipped ECU

Please HELP: After dropping in the b16A2, the motor bogs alot, when it is running, it goes real smooth, but at a stop or when RPM is low motor stalls and dies out.. the motor sounds like ****.. like a lawn mower engine or something,
Engine codes appear, CODE 7, 21, and 23 appeared at 1st, then i reseted the ECU and now only code appears is code 23 which is the knock sensor..
wut do i need to do to get my car running in good condition? when i drive the car, it doesnt feel so powerful, i dunno even kno if vtec is kickin in , some one please help with their expertise...

94si94cx

Please tell me you ran a knock sensor wire, if not this could be the cause of your problem. It will definetely make the car throw a code, but I don't think it will run like "****".

May I ask why you chose a p72? I am not going to flame, only curious.

vpxaboi

i need to run a knock sensor wire? i thought my car already had that wire. 95 civic EX,

i chose p72 cuz my stock p28 was for SOHC vtec, now dat its DOHC, i thought a GSR ecu will run fine.. any objections or suggestions?

94si94cx

Yes, you must run a knock sensor wire. It is the ONLY wire you have to run for a b16 swap.

The p72 ECU has a very low VTEC crossover point and also has a "crossover" for the secondary butterflies that the b18c1 has and the b16 does not.

There is a guy on this forum (username = Kenji) that will chip your p28 with awesome specs to run the b16. Also I'm sure the fuel timing and what not for the b18c1 is different than the b16. IM kenji and discuss this with him, but more than likely you need a new ECU.

AzG35

Knock sensor code will make it run poorly, it will dump extra fuel and retard timing. Yes, you have to run the wire, its the only on you need. SOHC Vtec motors don't have a knock sensor but B series VTEC motors do, and need them unless you have your ECU chipped.

vpxaboi

so now i gotta run a wire from my ecu harness to the knock sensor itself.. do you guys kno wut pin out its suppose ta be? and how many wires it should be..
So running a P72 ECU that has been chipped with the skunk program will make my motor run like ****? cuz i kno for sure its running too lean, too much gas and it boggs alot

Simple

no no no, take that ECU out and run a P28, it wont even look for the knock, and it wont restrict emiss. like a mother either.

94si94cx

Too lean would imply that there is not ENOUGH fuel.

You are running rich if you bog (more than likely) and you will probably be getting some black smoke as well.

The knock sensor is pin D3 in the ECU harness. On the engine harness it is a red/blue wire. It should be the only pin in one of the harnesses that does not have a counterpart on the chasis harness.

quik1

[QUOTE=Simple]no no no, take that ECU out and run a P28, it wont even look for the knock, and it wont restrict emiss. like a mother either. [/QUOTE

If you run the p28 make sure that you get it chipped. Are you even sure that you need a knock sensor hooked up, i thought that it wasn't a big deal.

94si94cx

Unless you have a chipped p28, you MUST have a knock sensor hooked up or you will run like crap.

Simple

ya, ive got a mugen P28, i really dont think it matters on the P28 tho, those year civics dont have a knock, so it doesnt look for it... so how could it cause problems? The EX harness doesnt even have a plug for a knock at all..........

anyways, get rid of the other ECU.... p28's are heaven when it comes to chipping and similar items. should solve problems too

i recently did my own B16a2 swap into my 95 EX, started first try, (forgot to tighten a fuel line and it poured everywhere.... but thats besides the point.) had a slight leakage in the oil, and slight over heating problem... but it was fixed within the hour, and i have taken it to 8000+ daily (only some days) BTW, you'll know when VTEC is working or not... very knoticeable

gotta love those B16's...... Turbo soon to come

ace1875

oXooooooooo
ooooooooooo

this is connector D and d3 is knock sensor

94si94cx

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Simple &raquo;</TD></TR><TR><TD CLASS="quote">ya, ive got a mugen P28, i really dont think it matters on the P28 tho, those year civics dont have a knock, so it doesnt look for it... so how could it cause problems? The EX harness doesnt even have a plug for a knock at all..........
</TD></TR></TABLE>

The car doesn't normally look for a knock sensor, but the p72 or any DOHC ECU will look for a knock sensor.

AzG35

What I was saying is that if you chip just about any ECU, they will eliminate the knock sensor. So it won't look for it. But if you keep your existing ECU, you have to run a wire to it.

boostedcivicsir

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Simple &raquo;</TD></TR><TR><TD CLASS="quote">no no no, take that ECU out and run a P28, it wont even look for the knock, and it wont restrict emiss. like a mother either. </TD></TR></TABLE>

i have a chipped P28 in mine no qualms. and NO 92-95 civic except the Del Sol vtec had a knock sensor. you will need to run a wire to the ECU.
(correct me if i am wrong)

AzG35

I don't think ANY P28 had a knock sensor.

2camsaam

may I ask where you got the engine?

acuracing

Also if you're going to run a wire from the ECU to the KS, make sure it's a shielded wire.

vpxaboi

SO are you guys all suggesting i run a p28 instead of the p72???

thanks for ur guys help wit running the wire.. imma try ta do it this weeekend.. its been hella long since i dricen my civic. anymore comments, questions, suggestions, threats , wuteva drop a message

vpxaboi

sumone recommended i run my stock ecu which is p28, but get it chipped with mugen, wut do u guys think bout that?

and if so anyone got hook up on chippin my p28?
and if thats the case i gota p72 for sale

94si94cx

Get it chipped by Kenji. There are several threads on this forum that vouch for his chipping of the p28 to DOHC specs.

And you are correct that NO p28 looks for knock sensor, but the del sol VTEC (as someone said) does look for the knock sensor because the ECU is not p28. I think its a p30 or a p03 I can't remember.

AzG35

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vpxaboi &raquo;</TD></TR><TR><TD CLASS="quote">sumone recommended i run my stock ecu which is p28, but get it chipped with mugen, wut do u guys think bout that?

and if so anyone got hook up on chippin my p28?
and if thats the case i gota p72 for sale</TD></TR></TABLE>

There are a few guys on here that do chipping. I had mine done by Kenji, I know eg6ajk, Katman and a couple other guys do it.

lonefuzzy79

ignore this post clicked the wrong post.....

stevecockrill

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94si94cx &raquo;</TD></TR><TR><TD CLASS="quote">Get it chipped by Kenji. There are several threads on this forum that vouch for his chipping of the p28 to DOHC specs.

And you are correct that NO p28 looks for knock sensor, but the del sol VTEC (as someone said) does look for the knock sensor because the ECU is not p28. I think its a p30 or a p03 I can't remember.</TD></TR></TABLE>

P30 is the del Sol VTEC.

Hondata will also chip your P28 to DOHC VTEC specs. Works nicely for me, no need for knock sensor input either (easier wiring).

Steve

boostedcivicsir

p72=obd2 if i remember correctly. p28=obd1!?!?!?