Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

P28 ECU and D16Y8. Anyone using the combo?

 
Old 10-16-2008, 06:28 PM
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Default P28 ECU and D16Y8. Anyone using the combo?

I am *trying* to run a stock P28 ECU for a stock D16Y8 engine. I realize that this is not the correct combo, however I do not see any real reason why it should not drive normally. Everything is stock.

I want to know if there is anyone else running the combo. D16X block with Y8 VTEC head is the same thing as a full Y8 in this case so yes post up if you have any variation.

I have this combo in a CRX, all wiring is correct, idle is ok, car drives like SHEEEIT. Anything under 3K rpms and under 30% TPS causes the car to buck/hesitate/randomly take off. When I push the pedal down the car accelerates in steps, but there is no hesitation. I have tried two different TPS sensors, this is not the problem. No useful codes. I can resolder J1 and tune the car with Crome, but I'm trying to avoid that until I absolutely have to.

So, is there ANYONE running a D16Y8 with a stock P28 ECU. Does it run smoothly. If not and you tried it, did it do what mine is doing?

Just trying to find out if I'm causing the problem or if I need to find it. Thanks.
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Old 10-16-2008, 07:35 PM
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The y8 is obdII a/b, the z6 is obdI. As far as i know, the motor needs to be converted to obd1 to run right. d-series.org
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Old 10-16-2008, 07:41 PM
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plus, p28 is not made for the y8 man, u need to get that ecu tuned so it could actually send the right mixture of air / fuel. you might be running too rich im thinking. get it tuned with that ecu and it will all be good, if all the wiring is good i dont think the conversion is needed cuz otherwise the car wouldnt start or a check engine light would be on.. any check engine lights ? if not, get it tuned, or see if u get a p07, which will work fine with ur car.
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Old 10-17-2008, 05:36 AM
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Default Re: (boostedhks)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostedhks &raquo;</TD></TR><TR><TD CLASS="quote">plus, p28 is not made for the y8 man, u need to get that ecu tuned so it could actually send the right mixture of air / fuel. you might be running too rich im thinking. get it tuned with that ecu and it will all be good, if all the wiring is good i dont think the conversion is needed cuz otherwise the car wouldnt start or a check engine light would be on.. any check engine lights ? if not, get it tuned, or see if u get a p07, which will work fine with ur car.</TD></TR></TABLE>

Are you on crack or something? P28 should run a D16Y8 reasonably well, its a very similar engine to the D16Z6, ideally get it tuned. All the sensors the P28 looks for will be on the D16Y8. P07 is a D15Z1 VX ECU, it will not work fine in the OPs car
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Old 10-17-2008, 05:59 AM
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What the heck??? P28 is the PERFECT ECU for a D16Y8. That's the closest you're going to get stock. I'm using a P06 on a D16Y7 and it runs perfectly. P06 is to D16Y7 as P28 is to D16Y8.
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Old 10-17-2008, 09:26 AM
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im runnin a p06 with vtec on my y8, on top of that, it has a z6 basemap haha. It will run it fine man, just get the obd2a/b to obd1 jumper harness.
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Old 10-17-2008, 10:52 AM
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the p28 will not run the y8 motor just fine they have completely different timing it will run but not run to its full potential
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Old 10-17-2008, 12:00 PM
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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM-JAMES &raquo;</TD></TR><TR><TD CLASS="quote">the p28 will not run the y8 motor just fine they have completely different timing it will run but not run to its full potential </TD></TR></TABLE>

I know the timing differences, I know everything there is to know about both of these. Only thing I don't know, is if the P28 will run the Y8, I need PERSONAL experience with this. Regurgitated theory isn't much help right now.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94EG8 &raquo;</TD></TR><TR><TD CLASS="quote">Are you on crack or something? P28 should run a D16Y8 reasonably well, its a very similar engine to the D16Z6, ideally get it tuned. All the sensors the P28 looks for will be on the D16Y8. P07 is a D15Z1 VX ECU, it will not work fine in the OPs car </TD></TR></TABLE>

This is exactly what I'm thinking. There should really be NO Reason why a P28 shouldn't run this engine reasonably well. I'm not expecting perfect, but I really don't feel like tuning the damn thing. Plus, I need to find out if I have a problem with the car or if the stock ECU IS the problem, otherwise I'm going to try and tune a car with problems and that is a serious waste of my time.
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Old 10-17-2008, 02:18 PM
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best bet would be to chip the ecu and throw a y8 map on it you can buy a chipped ecu for less than a p28 cost from me
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Old 10-17-2008, 03:37 PM
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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM-JAMES &raquo;</TD></TR><TR><TD CLASS="quote">best bet would be to chip the ecu and throw a y8 map on it you can buy a chipped ecu for less than a p28 cost from me</TD></TR></TABLE>

The ECU I have is already chipped, I cut J1 to turn it into a stock ECU in order to not have to do anything.

Basically I'm trying to confirm that my problem is definitely the stock P28 ECU. Need to knock off one problem at a time because if I start tuning the car then my possibilities of why the car isn't running correctly go up ten fold.
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Old 10-17-2008, 03:44 PM
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if you don't have any CEL and MAP and TPS are within specs, then I'd say there is something going on with that ECU. Incidentally, want to get rid of the knock sensor since you aren't using it anymore?
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Old 10-17-2008, 05:36 PM
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i used a p28 on my y8 and it ran like **** ....
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Old 10-17-2008, 06:20 PM
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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ej8_fredi &raquo;</TD></TR><TR><TD CLASS="quote">i used a p28 on my y8 and it ran like **** ....</TD></TR></TABLE>

Alrighty, that's what I wanted to know. Thanks.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IndySporty &raquo;</TD></TR><TR><TD CLASS="quote">if you don't have any CEL and MAP and TPS are within specs, then I'd say there is something going on with that ECU. Incidentally, want to get rid of the knock sensor since you aren't using it anymore?</TD></TR></TABLE>

I broke it when I supercharged the engine 2 years ago.
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Old 10-17-2008, 07:09 PM
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Why is it that every time I see a mini-me done with a Y8 head, people ALWAYS buy a P28 ECU? I know my P06 runs my D16Y7 PERFECTLY, but maybe p28 on D16Y8 is different? I know tons of people who have a P28 on a D16Y8.

Now, I am running just a D16Y7 long block with a D15B7 components. I'm not sure if this is why mine runs perfectly.
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Old 10-17-2008, 07:26 PM
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People use the p28 over the p06 because the p28 is already vtec and doesn't have to be converted.
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Old 10-18-2008, 11:47 PM
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Im running a p28 on my d16y8 motor...when i full throttle all the way to 7k rpm and let go of gas, my rpm falls back down slowly...does anyone know if I can get a d16y8 basemap burned into a p28??

oh yeah, my car hesitates when i floor it but i swapped out the injectors with obd2 gsr injectors, it runs so much better...
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Old 10-19-2008, 12:20 AM
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i had a y8 in my car was running it with a p28 it seem to run it fine minus the fact vtec wasnt working. the idle would surge every once in a while, but if you get the y8 basemap onto a chip and have them uncheck the o2 sensors you should be fine. since obd1 runs on a 1 o2 sensor and obd2 runs on 2 .i found this link to this website here on h/t phearable.net they will be able to get this basemap done for you
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Old 10-19-2008, 12:34 AM
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yup its passable to put a custom y8 map on a p28
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Old 10-19-2008, 03:56 PM
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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b17 turbo &raquo;</TD></TR><TR><TD CLASS="quote">i had a y8 in my car was running it with a p28 it seem to run it fine minus the fact vtec wasnt working. the idle would surge every once in a while, but if you get the y8 basemap onto a chip and have them uncheck the o2 sensors you should be fine. since obd1 runs on a 1 o2 sensor and obd2 runs on 2 .i found this link to this website here on h/t phearable.net they will be able to get this basemap done for you </TD></TR></TABLE>

Just stop posting.
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Old 10-19-2008, 05:18 PM
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like said before it will work but not too its potential because of the timing differences. i ran a chipped p28 on my boosted y8 for about 2 years, had it tuned good but the timing maps were always an issue. just never felt like it was running 100%. when i would get on it, it felt like it was being held back at higher rpm's. since then the timing has been solved but i will never run a y8 head again with any kind of OBD1 rom editor.
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Old 10-19-2008, 05:57 PM
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Just stop posting. ?
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Old 10-19-2008, 11:02 PM
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So...if I burn a y8 basemap on to my p28...will my timing be just like the original y8 timing since everyone is saying that the z6 timing a little different from y8....
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Old 10-19-2008, 11:59 PM
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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by honisoto &raquo;</TD></TR><TR><TD CLASS="quote">So...if I burn a y8 basemap on to my p28...will my timing be just like the original y8 timing since everyone is saying that the z6 timing a little different from y8....</TD></TR></TABLE>

no.
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Old 10-20-2008, 10:20 AM
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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jeffsciv23 &raquo;</TD></TR><TR><TD CLASS="quote">

no.</TD></TR></TABLE>

huh?????! that sure didnt help at alll..
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Old 10-20-2008, 10:23 AM
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Default Re: P28 ECU and D16Y8. Anyone using the combo? (SovXietday)

i know a guy locallly that has a p28 with a d16y8...dont know how he did it but its runnin. lol
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