Im running a d16a with stock internals e/h/i. the ecu is a p28 with no chips. ive been reading and have seen some people saying that the that it runs on a p71 and a p91. ive done some research and really cant find a deffinate answer. it got me to thinking that maybe the wrong ecu is affecting my fuel maps which is leaving me to loose power after 3rd gear. any answers would be a great help. thanx in advance.

 

D16A in a what?

 

ah hell. lol knew i forgot something. 95 civic ex with auto trans

 

And this came out of what car

 

have no idea. it was in the car when i bought it. kid that did it didnt even have a clue what he put in it to begin with.

 

Everything I've read so far says the ECU is supposed to be a PM6.

 

ok i havent even seen that yet. so could that be an issue of loosing drastic power in 4 and fifth gear? and now that i think about it, my rad fan wouldnt cut on so i straight wired it. i was told that the ecu was sending a signal to the fan to cut it on.

 

ok did some looking on the pm6. lets get all the the details out there before we go further. 95 civic ex, stock d16a vtec on an auto trans. running on a p28 with massive power loss in 4th and 5th gear even at full throttle. also rad fan wont receive signal from ecu to cut on. i do believe that is it that i had concerns with as far as the ecu.

 

not sure how its suppose to work but i know the civic is obd1 and so is a p28. but the pm6 is an obd0. now if thats the case wouldnt there be a jumper to make the swap worth a damn? basically what im asking is, if im running a obd0 motor with an obd1 ecu would i have these types of issues? and also to verify that this is the case, what kinda components would i look for in the car to find out if a jumper was used or not??? think i just open a whole new can of crap with buying this car..... FACEPALM

 

Engine bay pics?

 

anything in paticular you are needing or just an overall of the bay????

 

I'm no expert but someone might be able to ID something.

 

i am very confused. your car is a 95 ex?? so that means your ecu is a p28 stock...... is your engine a vtec engine or not? a d16a is similar to a d16a6... so that would mean its non-vtec.. a cel will make your car run like crap

 

give me a few minutes to upload these pics so we can be on the same page.

 

 

 

i'm gonna assume then that this is a d16a block with a mini-me Z6 head swap

in which case i'm thinking a p28 would be the way to go

 

how would i go about telling if that is the case??? not real familiar with the d series.

 

its obvious the block is a d16a, its stamped on there

what you probably didn't know is that the block is from a 88-91 civic where OBD0 was ran i believe.

the Head is most likely a d16z6 or jam d15 head??? which both are OBD1 because of the Intake manifold

your gonna run an ecu for the head not the block really, and d16z6's came with p28 ecus

 

ok that sounds right. just wanting to make sure that its a d16 head due to that im gonna do some internal work and want to buy the right things. that is if i dont go for a b16/18 swap. its a great car but there is a lot of power loss and im not too keen on the sohc since my first honda had a b18. ive seen a few ppl getting moderate hp out of the sohc though. to be honest im undecided on the swap or build the d up.

 

looks like it might not be a d16a head because it's not a d16a valve cover. if that helps you with anything.. i mean it could still be a d16a head with a different valve cover. but a d16a valve cover just has the honda emblem in the middle and honda written below that.

 

Last tune up?

CEL codes?

The radiator fan is not controlled by the ECU. Instead, an ECT fan switch screws into the thermostat housing (or possibly the back of the D16a block). Unplug it and short the 2P connector with a jumper wire. Does the fan now run when the key is in ON(II)?

 

Let me ask the obvious cause I did not see it posted by op, but I could be blind. Is the p28 you are running a p28 blah blah-A01 or a A52 since you are using an automatic trans (A52)you sure you are not using a 5-speed ecu?

 

i would say you are running a correct ecu and it is a d16a block with a z6 head swap. D16a's are rare and great motors for boost. they have steel girdles vs all of the other d series that have aluminum girdles. even better if rebuilt for boost. i believe its just the auto that's killing it they have much longer gear ratios and usually do die in 3rd because 90-100hp isn't enough to power for the long gearing. i would consider swapping to a 5 spd it would be a much better benefit with a z6 or y8 transmission.

 

OBD1 D16A vtec engines do exist, they were found in JDM '93 - '95 Civic coupes. They're basically equivelent to a D16Z6. A stock P28 will run it just fine. Btw your transmission is a 4 speed.