i just put in a jdm h22a engine in my 94 prelude (use to have h22a1). i used the jdm ecu with the usdm harness, fuel rail, injectors, distributor and ignition coil. on the jdm ecu, there's another small connector port, with 4 wires. green/white, green/red, green/yellow, and solid blue but i didn't know what they were for. ignition timing is set and the car idles good but the engine doesn't have any power (hesitating). it revs slow like my 1.5L civic. i have to step on the gas pretty hard just to get it to 40 MPH. this usually happens when it's warm. the only mods are CAI and straight pipe exhaust. sometimes it runs ok (mostly when cool) and sometimes the cel comes on. i did get codes 7, 12, 36, and 41 but after re-routing some hoses and resetting the ecu, i only have codes 12 and 36 now but i don't know what code 36 is. i had a euro r in the chassis before so it's pretty custom now. i mounted the MAP sensor back on the firewall and connected a hose to the TB and all vacuum hoses seems to be connected. i haven't check the compression yet but my friend has a tester. can it be any fuel (injectors), air, or ignition problem? anyone know what could be my problem?

 

What year is the motor/ECU from?

 

is there really that big of a difference btw the usd h22a1 and the jdm h22a? is it worth all the trouble?

 

Usually if you fix the smaller # code (IE: your 12) the larger number code will go away.

Also, check it again, there shouldn't be a code 36.


12 is EGR, whether it be the valve, or the wiring. It shouldn't make it feel 'sluggish' when throwing that code.

 

he probably blew his old motor

 

it's a 92-95 h22a motor with it's respective ecu bought from ebay.

 

it might have code 36 in jdm but i'm not sure and i can't find it.

 

TCS, only found on JDM P13s.

 

what's tcs? traction control system? anything i can do about it?

 

i just put in another use egr (bought on HT) in because the one on it was bent. i also put in a new o2 sensor. the car seems to run fine now but it's still throwing codes 12 and 36. i've checked all vacuum hoses and resetted the ecu. is the engine suppose to do anything when you unplug and plug the connector on the egr?

 

well, the problem is still there. i tried cleaning the ports and the air seems to be going in and out pretty strong when the car's running with the valve off. i'm still throwing the both codes and can't make them go away. any suggestions? i suck at engine diagnosting.

 

If you are using the P13, the EGR system must be hooked up properly. Meaning the electrical connections as well as the vacuum lines must be right. I saw you had a USDM P13 and sold it, WTF? Get your EGR hooked up right and the car should do fine. As far as I know, code 36 is not gonna give you any drivability issues like code 12 will. Good luck.

 

if your cel is on its gonna drive like snot...limp mode!

 

i've tested the egr valve and solenoid and they both work.
#5
https://honda-tech.com/forums/showth...light=egr+code
i tried leaving it unplug.
#2
https://honda-tech.com/forums/showth...light=egr+code
i even tried blocking it off. but, the problem still comes on at random, sometime even without the cel on. the code is still there when i test it though. will a scanning tool (autozone) describe the problem more in depth than the jumper wire? i don't care if the egr is working or not, as long as it doesn't have that sluggish feeling anymore.

 

i put in my p28 s300 in. the stock h22a map didn't do well. it started and had rough idle then stalled. then it wouldn't start anymore. the stock p72 map is what i have in now. the throttle response and the low end torque is not as good as the jdm ecu when the jdm ecu is running right but it seems to be more cosistant. the only thing is that it backfires a little when you let off the throttle around 3k ish or higher. the p13 does that too but not as much and loud. btw, the egr is still blocked and unplug right now. anyone know where to go from here?

 

it's been a while and i have been driving the car with code 12 on. the car is still running sluggish when the engine warms up. i tried my best today and couldn't get any solutions. does anyone know how to get rid of this problem. i'm taking it to the shop soon if i can't find any answers.

 

Have you tried following the troubleshooting methods outlined in the Helm's manual?

 

no. i don't have that manual. i only have the downloaded honda prelude 92-96 mitchel on demand manual and there's some info about the egr but not ways to troubleshoot it. does anyone have it?

on HT, some people said that the egr doesn't affect the drivability, so that makes me think that it's not even the egr. it bogs even at WOT but not that much of a notice when vtec engages. it also bogs when i'm in the freeway. but most severely is when i'm accelerating uphill.

 

www.spoonertuner.com/manuals

You can get the USDM or non-USDM version.

 

I have this same issue on my h22a civic, so if you get it fixed please let me know. Thanks.

 

same for u