I am having slightly diffrent issue's but close.. Mine has a B8 block B7 head but stock intake manifold and it runs like crap at idle and anywhere below 2200rpm.. On highway or higher rpm it does GREAT swapped the B7 235cc injector's over and it made it snappy on topend.. But is it running like crap because the d15b8 intake manifold has such tiny ports? and the b7 has bigger on the head? Causing it to run like crap until WOT or higher rpm? Any help would be much appreciated Sorry new to this honda-tech posting stuff.. Timing is also set right thought id add that and the ecu is set for the b7 PO6

 

Smaller porting would cause the exact opposite problem. You would have more power low end until the ports started choking out when it required more air at higher rpms. What are you spark plugs reading? rich/lean/fine? Any smoking at lower rpms and idle?

 

No smoking at lower rpm. no smoking at all.. It runs good when throttle is more than 1/4 open but it WILL NOT idle for crap! sometimes it will go to about 500rpm and work itself up slowly to 1000 but runs like crap while doing it.. Plugs are new but the old 1's were rich.. Fuel soaked.. I have accel spark plug wires on a good dizzy+cap and rotor.. It ran fine 2hours before that head was installed so it has to be something with the B7 head.. Cam is good valves looked good idk wat it could be.. This is just my DD and i gotta get it runnin better, LUCKLY i travel highway alot so the car runs decent on the highway.. Get a little worse gas milage than the B8 head but stilll dont make sence.. no knocking or ticking sounds i had the 16V relife cuts in the b8 piston's (LUCKY). Timing is dead on from what i can see.. only thing i havnt done was put the B7 intake manifold on and thats the only thing i can think of cuz the pistons are great with good rings.. I just wish the thing would run right! all the sensors on the head are new and the connector's are pluged in the right spots. firing order is set right.. Im just stumped.
Thanks for the reply

 

Did some research for you and you should be running a b7 ecu You said you were running a b8 right?

 

I am.. im running the d15b7 ecu P06 I have the d15b8 ecu (p05) sitting right next to me.. So i have a total of d15b7 ECU,Injector's,head and distrubitor all in the car right now.. Only thing thats d15b8 is tranny,intake manifold,and block.. Everything else is B7.. So im lost.. i dont have a 4 wire o2 ran yet cuz i have no money for 1 but my old B7 in my EJ1 didnt have 1 either but it ran fine.. So im so confused.. Unless somehow timing is still off or something which i doubt. I did it like amillion times!.. Maybe bent valve? What do you think of bent valve? I dont think any are bent enough 2 make it run like that but its possiable.. This just has 2 get me by till christmas time cuz i have a d16y7 head coming to me.. I WISH IT WOULD JUST RUN RIGHT!!! URGGGGG

 

Its gotta be the A.Head or B.Intake manifold.. Or at the last on list C.. TIMING

 

Would go intake manifold. The map sensors are different between the 2. On the b7 its mounted on the firewall i believe and the b8 is on the throttle body (or vice versa cant remmber) they are different though so they probably give different resistant readings. This would definently cause your problem. If not i would run a compression check to see if the valves are bent or maye som valve seats are bad.

 

B7 and B8 are both mounted the same. 92-93 is firewall 94-95 is TB. Same MAP sensor. Same everything.

If you're running P06, 240cc injectors and B7 head on a B8 block, your problem is timing. That intake isn't hurting anything.

Sounds like you've got your timing retarded more than it should be, or more likely advanced a little too far.

 

Yea the d15b7 (auto tranny) is mounted on the wall and the ecu i have is for a Manual tranny D15b7 came outta my old EJ1 So im just confused.. Im sure it has to do with manifolds but idk.. Ima try 2 get a buddy to let me borrow his d15b7 Mani off his EJ1 that has manual tranny to see if it works and if it does ima buy it off him, I hope it just something stupid like MAP sensor or something cuz i could see the MAP causing it to do this. so hope your right and if it dont work ill do a compression test. Idk where to get the stuff to do that for free but i can look around and see if any1 has anything to do that.. Iv never done 1 before and iv had ALOT of honda motors none of them needed a cmpression test i knew when they had bad rings or something stupid.. So u think it might smoke tho if it had bent valves?

 

Sry i posted late lol.. Ya i have a 1992 honda civic Cx hatch that is mounted on the throttle body MAP

 

Bent valves what really cause much smoke most of the time unless its bad enough to bend mess up the valve stem and then you would here a valve knocking. Im pretty sure autzone lends out compression testers. All you have to do is pull out your spark plug screw in the tester and run the motor over (unplug all the spark plug wires so it doesnt start). The numbers are important as long as they arent like super low like 90. What your looking for is a huge change in pressure from one cylinder to the next. Like say you get 180/175/185/75 this would indicate a dead cylinder. But this probably isnt your problem cause the motor would run bad generally all the time.

 

ok thanks.. So its probably just timing.. BUT ima get a b7 intake manifold a 4wire o2 and check for bent valve anyways.. but its probably just timing so i should be good.. Might also be fuel pressure regulator i read that somewhere so who knows? Ill figure it out in time.. Thanks for all the help tho Ill try to keep updated on what it was so i can help some other person who ends up having this problem

 

Yep good luck hope you get it all figured out.

 

also i see your from derby Kansas Im from hutchinson ks.. lol I used to live in wichita lol thought that was pretty awesome.. Im currently in Hutch now.. THought id say that lol And i doubt i have a bent valve its probably just timing.. Im not very great at timing But i get it close.. But sometime's close isnt close enough

 

Lol sweet. I think your the first person ive seen on here from kansas lol. I wouldnt be surprised if we've met at one point it time or another lol. Ive been in the car game for awhile and ive met 100's of people in the surrounding area through cars lol. I used to work at a race shop in douglass now im trying to open my own shop here in derby. But not trying to hijack this thread of topic lol. Yeah your valves are probably fine, i would check mechanical timing first.

 

Will do ima look up timing crap again for the B7 cuz thats practially what motor setup i have now.. so ima have to time it and go from there add me on facebook look me up under andrew james sanchez I have a profile pic of me and my gf kissing Sorry for hijacking this thread! :/

 

Lol ight, sent a request, i have pics of my civic and sentra in my albums so you'll know its me lol

 

Two threads for the same thing?

So I'll post up the same reference twice for the same thing (I can already tell you what the problem is but if you READ through this you'll figure out what you're missing):

https://sites.google.com/site/24teng...h-16valve-head

 

Ok so im a total NOOB aparently. Cuz i have timed a d15b7,b1, D15b7w/y7 head.. Iv done Z6 and everything and i some how managed to screw up timing on a B8/b7. I took timing belt off and lined up crank marks and cam marks and then re-installed belt and THEN put b8 pulley on so now it runs so good compared to b4.. lol So in other words its runs alot!! better!!! Still has a miss fire but i think ima tooth off or so but much better and idc if im off by a hair it runs perfectly fine for me and my daily driving until i get my d16y7 head

Thanks for all your guys help!