Thepowderblue

H22s have different compression ratios, so i would think they would need to be tuned differently. I am running my h22a4 off a h22a ecu and its running like crap(pof). I put a f22 ecu in and it runs better!How come all the ecus are just known as h22 ecus?
What h22 is a p13 for? is it for the higher compression JDM h22a (11.1) or the lower compression usdm h22a1 and h22a4 ( 10-1)?
I just dont know what ecu to buy or what tune will work on my h22a4.

THC07

ALL engines are different and should get its own tune. none run the same.

Yes the different ecus do have different tunes "basemaps"

There are a few p13 ecus, they are different. What s your h22a4 engine in?

I always liked the obd2 P13 ecu for my ole H22A4 but its hard to find

THC07

oh and more info, car year etc

jdm_rb20

If you are running the "h22 basemap" that usually comes with hondata software, it does run like crap. There are many hundreds of internet posts asking for a decent h22 basemap.

Be careful, tuning should be done by the pro's. Shortly after I started trying to tune that h22 basemap, my oil light started flickering on low idles. Soon after, I spun a bearing. I have no idea if the tune caused an oil problem, but it seems highly likely. Don't ignore the oil light flickers!! a momentary lapse of oil pressure is all it takes to spin a bearing

Thepowderblue

Its A H22a4 In a 90 Accord. So your saying p13's have different tunes! Should I get a usdm H22a1 p13? Honestly I am not trying to build a race car I just want a fast Accord So I would like to be able to get a stock ecu and plug it in, I dont want to have to chip and tune and all that crap.

THC07

its not crap. Its so important to tune your honda if you want it to be any kind of fast.

even if its all stock, spend the money on a tune, you will never regret it.

jdm_rb20

I think I misunderstood your original question. I thought you were talking about custom EDU tunes. However, if you are running a stock H22a4, I don't know which ECU will run it best. You need to google/research to see if you can use a OBD2>>>OBD1 conversion harness to open up your options to include the earlier h22 ECU's.

But, in general, yes, each h22 had a different ecu: The jdm h22a ecu is believed to be a more aggressive tune than the USDM h22a1, but the jdm h22a ecu has a governor...sad day. In theory, I would imagine that the h22a4 may even be tuned to perform in harmony with the ATTS that the original car may have had...I dunno about that one

Thepowderblue

Yeah, Alll I am asking is what stock ecu will run my H22 right. Its runs like crap with the P0F. I mean It feels like I have 100hp, If that.It runs kinda with a miss, Dies at idle, has no power, boggs, sputters bad, wont rev past 6500, and vtec is not engaging .Do you think I may have a bad ecu and should all stock h22 ecus run it good?

Thepowderblue

So I think I may have a bad ecu.... Will a p13 drom a JDM motor work even tho mine is a little lower compression?

BB1 H22A LUDE

Yes it will "work". How well your engine will run is another story. JDM P13 is tuned for high octane (95 plus in Japan), plus the base fuel and ignition maps compensate for the higher compression (10.6:1 on a JDM H22A, 11:1 on a Sir S Spec/Type S H22A) so I would expect a JDM p13 to have the H22A4 run rather rich. May even get an overactive knock sensor response with low octane fuel, making you throw smoke clouds in Vtec. So in the end, any P13 will run your H22A4 engine, but if you want it to run well you will need to tune it. Options are Hondata/chrome etc or a piggy back (VafcII etc) and either get it dyno tuned or get a wideband and road tune it yourself.

The satisfaction of having a tuned H22A is priceless, IMO anyhow.lol

jdm_rb20

If you go this route, I recommend re-reading my posts (from when I thought you were talking about "tunes" for your ECU. Also focus on searching WHICH tuneable ECU you will need. I can't think of a single h22 factory ECU that is "tuneable". You will need a tuneable ECU like a p28 or p72 or such, and will probably need that OBD2>>OBD1 conversion harness...more googlin...sorry

google: Hondata s300
p72 vs p28
h22a4 hondata (to see what setup others have used to make it work)

also go to hondata's website to read alot of the FAQ's/tutorials...

gstrudler

Don't forget your injectors have to match the ecu you are running. You can't just swap OBD1 and OBD2 ecu's around without changing the injector setup due to the impedance issues (saturated vs peak/hold). I'll bet this is the problem you are running into right now. If you are running the h22a4 with the stock injectors, they are the OBD2 peak & hold style injectors. If you want an OBD1 ecu, you need the h22a1 injectors and the resistor box. Someone please correct me if I'm wrong.

jdm_rb20

This sounds absolutely correct. I read this several times before when i was researching my h22a injector compatability.