Bought a hatch around christmas time had a fucked up d15 in it, bought a cheap jdm d16y8 non vtec to replace it for now. Have only been doing daily driving till these past few days ive hit the highway the car runs great but when i hit 5th gear it gives me 0 room to gain rpms it just basically idles there bwaaaaaa the whole time u cant give it more gas and the rpms go up so i basically drive in 4th. Any ideas? i have a p06 ecu in it.

 

There's no such thing as a JDM D16Y8 non-VTEC. You don't have 8 gears. Would you care to try that whole thing over again? You should probably read this, then try that whole thing over again.

 

Relax im new to this **** why u gotta be like that? im here trying to ask a simple question and hopefully get a simple answer. My motor is a d16 which i thought thats all it was until i went to a local rim warehouse and was talking with a guy he looked on my motor and said it said d16y8 on it lol. So idk :\

picture of it if that helps at all

 

Figure out what motor you actually have by checking the codes on the block and head. Post clear pictures.

In addition, all tech threads absolutely require that you post car information.

Your ECU is for a D15b7 engine, so it's unclear that it's right for your engine.

And what's up with 8th gear?

 

o sorry wtf i mistyped that , i meant FIFTH OMG thats why im like wtf man whys this guy mad at me the first poster i meant 5th gear sorry sorry

nono its a d16y8 confirmed THE ECU we had on it before me and my mechanic was a p05 but we werent getting as much rpms out of it and + it was fried so my mechanic told me if we get a p06 ecu well be just right. Like i said my problem is after doing lots of highway driving i found out it doesnt go past 85 im wondering what the reason of that could be. The ecu? Basically when i shift into 5th with the gas in and i put it all the way down it doesnt increase in speed really it just kind of sits at 79-83ish. The car runs fine in all gears just when i hit 5th gear its not letting me go any faster

 

hoepfully i can catch ronj before he gets off this guy knows the best. I can take pictures of it being a d16y8 tomorrow if that will help you

 

I'll be damn if they did a mini me with the y8 block when it already had vtec on there. Unless the head was fucked and they guy decided to slap another head on there.

 

You say RonJ knows best but you can at least meet the man half way by posting some detail information on the car and engine. The only thing you've said so far that caught everyones attention was "8th gear" and "jdm d16y8". Seriously post up the engine block code and head code and take a picture of the ecu code as well.

 

RonJ does know a lot.

However, I would assume that having an engine with 70whp would contribute to your lack of top speed.

 

You aren't going to get any help until you answer certain basic questions. These questions are required of you, which is why I linked the rules sticky - you need to read it. The following is a list of ALL the things you need to tell us before we can even begin helping you.

Chassis
Body
Engine Code
Head Code
ECU Code
CEL status (Is it on? Does it work?)
Any and all modifications made to the car

Once you've answered all of those questions, preferably in a clear and concise way, we can begin to help you.

 

gonna have to take pictures of that stuff tomorrow since you guys dont want to believe me, i dont understand i have a 95 dx hatchback with a d16y8 non vtec motor swap that i bought from a jdm warehouse with a p06 manual dx ecu.

 

OK, I'll say it again for you, since you decided not to read it the last time I said it.

There is no JDM D16Y8.

All stock D16Y8's have VTEC.

I gave you 7 simple questions to answer, and you didn't even try. RonJ isn't the only person who knows their **** around here. Answer the very simple questions, and you might just have a solution by the end of the night. Decide to keep ignoring the questions, and we'll just have to running around in diagnostic circles. You waste our time, we waste yours.

 

However what he probably means is he has a D16Y8 in a non vtec car so is not running vtec. It may be a vtec motor but until it's wired it's essentially a D16Y8 non vtec running the D15B7 P06 ECU.

Am I close understanding what you are trying to express OP?

Looking at the pic, it looks like they kept the D15B7 IM and TB. I couldn't see if the solenoid was still there just not wired. Not sure if you can remove the solenoid without issue.

So 6500 rpm rev limit from the P06 ecu, pumping fuel for a 1.5 liter into a 1.6 liter motor that after a certain rpm wants by design to get more fuel and engage the wild lobe via vtec and designed for 7200+ rpm for the power band, instead keeps to the tame lobe and docile fuel. Add in the high gear ratio of fifth gear, the torque just isn't there due to the severe mismatch in ECU and Motor.

If you do indeed have a D16Y8 motor in that car, you need to get a chipped ECU with a base map for the Y8 motor or do the OBDI to OBDII conversion to run the D16Y8 ECU and either method you need to wire VTEC.

 

nice answers dude....

HT is great

 

And the B7 valve cover, which only makes that motor even more of a confusing clusterfuck. OP needs to answer the questions before we can even begin to help him diagnose anything.

 

B2/B6/B7/B8/A6 all have the plugs on the back side of the head so the valve covers aren't interchangeable with the Y5/Y7/Y8/Z1/Z6 so post all the numbers in these 3 locations.

 

Agreed. Frankenstein Motors........

A good start is the numbers HondaPartsHero posted the pic of.

 

That's a '95 Civic. The intake manifold is either from a D15B7 or a D16Z6, throttlebody is originally from an automatic. Driver's side mount is from a '94 - '95 VX/EX/Si The block is not a Y8, note the dipstick location, a Y5/Y7/Y8 is next to the oil pump. The head is also not a Y8, it's an '88 - '95 non-vtec head. Valve cover is from a UK Rover. The distributor appears to be a Hitachi not the standard Tec unit. Basically you have a mess.

 

Ok im sorry to clear things up it is a d16y3 not 8. Picture posted below.


It does have a cel on i personally havent checked it my mechanic said it has a cel code because of the motor swap. I personally bought the ecu so i know its a p06. Not sure how to get the other codes for you hopefully this picture clears things up

 

Yes my mechanic said he would use what he didnt need from the d16 from my old d15 the intake manifold is from my old d15 i can confirm for the most part i just realized this morning its a d16y3 if that helps at all

 

Post the head code.

 

where is that exactly? i found a thread on ht about where its located but the image is no longer hosted.

if its the code on the motor right near the headers it says PA 34

 

See post #16.

 

D16Y3
Found in :
1995–1997 Honda Civic MB1 LS (UK/Europe)
1996–1997 Rover 416 SLI Auto (UK/Europe)
Bore and Stroke: see D16 Series Engines
Displacement: see D16 Series Engines
Compression: 9.4:1
Power: 113 hp (83 kW) at 5,600 rpm
Torque: 140 nm at 5,100 rpm
Redline: 7,200 rpm
Valvetrain: SOHC (4 valves per cylinder)
Fuel Control: OBD-1 MPFI
The camshaft is the same as D16A6

 

Yes i appreciate you finding that i had it copied from wiki but i wasnt sure if ronj needed that aswell, but the code that is on the head ronj is PA34