Hello, I am new to this forum as well as being a prelude owner. I just bought a 2000 prelude yesterday, that has a few issues. The question I have is about a wire harness that I noticed was unplugged when I was changing the oil. I can see where the connector would plug into and the wires that are supposed to plug into it. It is missing the connector that the wires are attached to. Anyway, the clip that it is supposed to go onto is green and right new the oil filter. If I remember correctly it has maybe a metal pipe on the other side of it. I am trying to figure out what this connector is for. If it helps it is supposedly a JDM h22 engine, that was swapped in place of the original. If need be I can take a picture of it tom. Any help is very much appreciated in advance. Thanks
Yeah, I looked around on the net before posting, and that was the closest thing I could see that it could be. Not really sure exactly what it does. I know it said something about making it run advanced timing as far as it could without going to far that it doesn't run right, i guess. Also, I will get a pic of it. Will it have bad effects to drive without it. That is how I bought the car, so I know it has been driven A WHILE in that condition. I found out tonight, when I was going through the paper work, that the receipt says the engine is out of a 93-95 prelude. What exactly is the difference. I ran a scan on the car before purchasing, and it had three codes0122,p0138,p1459. The seller said he put a new tps sensor on it and he didn't know how to line it up, anyway, I tested the tps sensor and don't think it is any good. I have order a new one and will put it on when I get it, I have also ordered a new rear o2 sensor. The last code has me a little worried, because there is a long list of things it could be. I was just wondering, if the car has the stock ecu with an older h22 motor, will that throw a code? Anyway, thank you for all you help and if more info is needed to diagnose, then let me know. Thanks, John
I found out tonight, when I was going through the paper work, that the receipt says the engine is out of a 93-95 prelude. What exactly is the difference. I was just wondering, if the car has the stock ecu with an older h22 motor, will that throw a code?
The difference is that 93-95 H22's are closed deck design, and they were in OBD I cars. 96(I think) and 97-01 are open deck and came in OBD II cars that came with more emissions based electronic crap. If the the OBD II ECU is being used with a 93-95 engine, then it will only throw CEL codes if all the extra sensors were not swapped over to the "new" engine along with the ECU. If the knock sensor was not connected and you are still OBD II it would throw a CEL code and make the car run like crap. If you don't have the original OBD II ecu, you may or may not need the knock sensor depending on what ECU you have in its place.
Yeah, that def. helps my understanding. Sorry I didn't get back to you yesterday, just been busy lately. Anyway, I did take some pics of the sensor I was talking about. They are obviously taken from under the car. I tried to get the wires and sensor in one pic. The wires are the blurry thing in the pic. Thanks again for your help!!
Your power stearing line runs by there. Thats what it looks like. Id trace the line up to the pump to verify. Should be a pressure sensor on the high pressure side. If you have original 2000 chassis wiring the connector should be near there unless it got removed.
I am not sure if its a coolant line. I will have to get a better look at it. I found this page in my manual, and couldn't find the sensor. This manual is for the 97 and up prelude, so that might be why, only thing is, is the wires are there too, so seems like it is in the 2000 wiring harness, unless something was switched. If anybody changes their oil soon, if you don't mind looking and just seeing if you have that sensor/wire connector. Thanks for all the help, just don't want to blow my motor or cause any serious damage. Thanks, John
Its your power steering pressure switch. Sends signal to ecu to raise the idle rpm when load increases on the power steering system. If not hooked up it might throw a po551 code and your idle might run a little low when you are doing parking manuevers.
Yeah, you all are dead on about the power steering pressure switch. I haven't noticed any problems or codes from it yet, but I am going to fix it anyway. I will have to find somebody parting one out and get the clip that connects to it. I have the wires, intacted, but missing the clip. Anyway, thanks everybody for your help and input!!
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0122,p0138,p1459. The seller said he put a new tps sensor on it and he didn't know how to line it up, anyway, I tested the tps sensor and don't think it is any good. I have order a new one and will put it on when I get it, I have also ordered a new rear o2 sensor. The last code has me a little worried, because there is a long list of things it could be. I was just wondering, if the car has the stock ecu with an older h22 motor, will that throw a code? Anyway, thank you for all you help and if more info is needed to diagnose, then let me know. Thanks, John
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