Integra LS ECU in a Prelude Si..... truth explained
While at my friends house swapping a B16 into his Integra LS, he let me try out his PR4 (LS ECU) in my Si so that i could tell you guys what really happens when u do this and to clear up the previous thread about this.
I disconnected the battery, yanked my ECU, bolted up the LS ECU, reconnected the battery, started her up, and then let it idle for about 7-8 minutes. I drove around for a few minutes and then started to open her up a little. I did a second gear pull to redline starting at 2K RPM going WOT. off the bat the car seemed to hesitate and kinda bog up until about 3K RPM. After 3K RPM my Lude started to pull really freakin hard. It was a very noticeable difference. But right when my secondary intake runners opened up my Lude seemed to lose some of its edge and hold back a little. Every gear i tried proved to run the same.
The worst part was whenever i came to a stop light and dis-engaged the clutch, the RPM's would drop to 200 RPM and then my car would die. This never got better even after i drove around for about 15 minutes. I personally would never run a LS ECU with my H23A simply because it hesitates whenever my secondary intake runners open up. whenever i race, i get most cars off the line with my torque down low and then I usually pull on them on my top end. The PR4 doesnt let either one of these happen. so i have come to a conclusion that the LS ECU is worthless for the H23
Originally posted by OSOFAST10 what year LS did he have. cause i heard you can only use an ecu off a 94 or 95 to make it work right.
Its not that a different year ecu will make it "work right". The PR4 ecu is not programmed to give enough fuel to the larger 2.3 engine. The PR4 is made for a 1.8 liter engine... its just common sense to see that it won't give enough fuel.
i was under the impression that only the h23 h22 and the gsr engine had a dual stage TB. if that is the case doesn't the vaccume be useless meaning that it would aways be open. that might explain why ther is a bog on the low end, cause if you unplug ur vaccume tube, you just bog till around 3-3.5k and pull alll the way to red line
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Every one is So :Hien:
95 Si. 10/22/06 Sold, but never gotten.
Quote:
Originally Posted by IDBree
[13:49] o1ambre1o: Given some Malibu, I'd bang you hien!
Man do any of you read my threads? I posted all this stuff already. Trust me I know my sh*t. If you really had to go try it out, or you actually thought it would improve your car, then you have no clue. here you go ls ecu on SI
Originally posted by MidNKight-lude i was under the impression that only the h23 h22 and the gsr engine had a dual stage TB. if that is the case doesn't the vaccume be useless meaning that it would aways be open. that might explain why ther is a bog on the low end, cause if you unplug ur vaccume tube, you just bog till around 3-3.5k and pull alll the way to red line
Also it isn't a dual stage TB it is secondary runners opening in the Intake Manifold controlled by a siliniod and vacuum. And the b18 has it as well. Not just the B18c. In fact I am using the silinoid from a LS Intake Manifold.
Originally posted by sik96prelude Man do any of you read my threads? I posted all this stuff already. Trust me I know my sh*t. If you really had to go try it out, or you actually thought it would improve your car, then you have no clue. here you go ls ecu on SI
I think most of us knew that it would not be bennificial but there still seemed to be people asking and they didnt get the point that the car would run lean.
The car f-in run lean!! It goes into open loop over 4k and sprays as much gas as the injectors will spray! It is essentially an H23 ECU over 4k axcept for the ignition map. I don't have the flappers anymore and if you don't you won't have that prob.
Ha ha ha. The ECU you need is from a 94-95 LS NOT A PR4. I was NEVER talking about a 90-93. So don't come at me like I'm an idiot. Mike PS dagerzone i don't care if you're a guy but i love you, thanks.
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