Anyone running the 92-93 integra b18a1 engine with the plug and play 94-95 integra ecu? Thoughts? Issues?

Lol I don’t have an engine from India. I’m in Pittsburgh and I have the normal 92-93 integra engine. B18a1. But the obd1 not the obd0 version. Sorry, bout the confusion.

also my question wasn’t whether you can do it, but rather is there any positives or negetives to running the b18b2 p75 ecu

thanks for the correction. But no I’m not asking if there’s a performance improvement. I’m trying to figure if there’s any risk in running the ecu long term. I have a 1992 integra that has a p75 for brains. I’m having some strange symptoms related to idle and warm starts that I can’t figure out. I know the intakes and cams are slightly different. Perhaps the sensors are different too? If they are, maybe my issues are related to the ecu. I don’t want to just buy the pr4 and throw it in hoping to solve my problems though.

Looking more for answers from people with experience doing this, and not theoretical replies. That, or someone familiar enough with the DA to tell me what could cause my issues.

basically ANY time that I come out of gear into neutral, whether if it’s after coming to a stop at a light, or when cruising at highway speeds, the engine drops to like 300 rpm then bounces up and begins begins surging / idle hunting between 600rpm and 1200rpm. If I’m at a complete stop, it does this for about 5 seconds then it settles into a nice idle of 900 rpm. If I go into neutral at highway speeds, it will continuously surge/hunt for idle. Another strange thing is if I’m completely stopped and I turn the wheel even slightly, then it will cause another 5 seconds of surging/hunting before settling again.

Rarely, in fact very rarely, after some super spirited driving, (think redlining through all the gears) the idle will continuously surge while in neutral until the car is shut off.

the other issue is that after a warm start, the engine likes to bog down if I attempt to apply anything less than 50% throttle. It feels like fuel is cut, the Rpm begin to drop and for about a full second, my pedal becomes unresponsive. It then cuts back on but if I try to just cruise in 1st, 2nd, or 3rd gear with light throttle, the issue will repeat itself which causes the car to get very jerky, making it seem like I don’t know how to drive a stick. If I apply some decent throttle, there is no bogging down. But as soon as my foot comes off the pedal the car jerks and the rpms begin to drop rapidly... this is really annoying. If I keep driving it, it will go away after a while. This does not happen after every warm start but rather more often than not.

So so far I’ve checked for air in the cooling system.
ive replaced the ECT and o2 sensors. I’ve cleaned out my IACV valve, and I’ve checked timing. Spark plugs and wires. Beyond that I’m lost as to what could be causing this.

thanks shodan. I feel like such a noob with this.

Shodan please, answer me this...

in your experience, how can steering input cause the idle to fluctuate? I do have power steering.

I discovered today that there’s a chip installed in the ecu. Lol. Sort of stumbled on this by accident.....Discovered that a nagging water leak in the passenger wheel well has caused the entire carpet and floormat to be soaked since it’s been really cold lately....No more evaporation....so I pull out the ecu to try and wrap it with some plastic, and Decided to open it up first. After looking for a little while, I saw the chip. I am really surprised! So I knew the car had a p75 in it when I bought it, but the previous owner never mentioned the chip. I’m going to get another ecu and see what happens.....

I don’t have what’s needed to do that.
Besides, this motor runs really well. Despite 228,xxx miles on the clock, it has good torque and it feels like it is making power all the way to 6k. More power than it should, being that it has NO bolt ons. I did discover an aftermarket flywheel on it..... I’m starting to think that the engine may be built and that, this ecu is helping take advantage of it, so I wouldn’t want to mess with it.

Stock pr4

I’m just getting familiar with his car as I’ve only owned it for 8 months.. My first integra ever... always been a civic owner but always loved the DA body style. This one was clean and rust free but It was not running. $1000 cash. It needed a distributor, the trans was shot and all types of suspension bits needed replaced. I’ve had it in good street runnin condition since September. I actually drove it to Atlanta and back from Pittsburgh and i went through the mountains... now I’m in love with it.

But like I said, why the previous owner was running a p75 on it seemed weird as everything else seemed to be stock... but now I’m curious if the tuning chip is really making a difference...

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Just a few pics of my new whip.....its a beauty! Lol