WTF, I've read and read through all the former posts, but can't find any definitive answer about this swap. i've been trying to get this swap to work with just conversion harness and obd1 P72. As soon as I start the car it throws a CEL 9 for CYP sensor. It seems like I need an OBD1 dizzy, but yet all the searches that I've performed say differently. I also tried a P30 and it does the exact same thing. How do you wire the OBD 1 dizzy into the 5th gens wiring harness. There's another guy on PGMFI.org with the exact same problem, and he's tried numerous ECU's and 2 conversion harness' and gets the same CEL 9. Who's done this swap on a 5th gen lude.
That worries my as i'm going to run a P72, but I've heard you need a p28 for a 5th gen. It will not throw codes or hinder performance due to it using the knock sensor and holding th car back. Can someone please verify this?
problems:
#1: a P72 is for B-series cars. That is WAY off for our motors.
#2: a P30 is for B-series cars. That is WAY off for our motors.
#3: you'r not searching well enough. Their is craploads of information about this all over this site.
You don't need the "dizzy" distributor for OBD1 but if you plan on tuning your car, then you will want it, as you cannot tune with an OBD2 distributor well.
#3: you'r not searching well enough. Their is craploads of information about this all over this site.
I've searched this site heavily, and if what you have said in your #1, and #2 is true then there is alot of misinformation on this site which should be cleaned up.
I know which cars these ECU's come from, and I was told by one of the best tuners on the east coast that I could use a P72, P30, or a P28. None of these ECU's come from a H-series engine.
Quote:
You don't need the "dizzy" distributor for OBD1 but if you plan on tuning your car, then you will want it, as you cannot tune with an OBD2 distributor well.
i'm running a chipped p72 with a more agrressive p13 map and i have had no problems what so ever. so the problem has to be with your car. is yours chipped? what kind of program? is it one of those ebay chips? is it socketed right? you prolly just need to reprogram it if so. all the ecu does is tell the engine what to do. if you program it right there should be no problems. i don't know what to say man. i have the same setup and i love it
WTF, I've read and read through all the former posts, but can't find any definitive answer about this swap. i've been trying to get this swap to work with just conversion harness and obd1 P72. As soon as I start the car it throws a CEL 9 for CYP sensor. It seems like I need an OBD1 dizzy, but yet all the searches that I've performed say differently. I also tried a P30 and it does the exact same thing. How do you wire the OBD 1 dizzy into the 5th gens wiring harness. There's another guy on PGMFI.org with the exact same problem, and he's tried numerous ECU's and 2 conversion harness' and gets the same CEL 9. Who's done this swap on a 5th gen lude.
Man that's really weird. I have heard of people having this problem before. I did several P28/P72/P13 swaps in my 5th gen and never had problems. I was even told by other people that I need the OBD1 dizzy also before I ever tried, but I ignored them.
I don't really have much advice for you. Keep plugging with the oscope and hopefully you will catch something.
Also: what brand harnesses are you running?
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I'm hoping that this CEL 9 was caused by a non H22a bin file. Yesterday I created a hybrid distributor, using the dizzy harness from an OBD 2 dizzy, and the casting from a OBD 1 dizzy. I wired the CYP sensor into the harness and passed the TDC, and CKP wires through open holes in that harness plug. Wired everything up and the damn thing still threw a CEL 9. I know that my chipped P72 hasn't been refalshed to run on a H22, so I just flashed a P72 based H22 map onto the chip so hopefully this sovles the problem.
Well that didn't work. I know that I have a CYP signal, because I verified it with the scope. The only thing that could be wrong in my mind is the pins on the conversion harness. But they both check as per the OBD1 and OBD 2a diagrams. I also did a continuity check on both of them. This is beginning to be just plain retarded. I have until June 15th that's when I get neptune, and tuned.
Well that didn't work. I know that I have a CYP signal, because I verified it with the scope. The only thing that could be wrong in my mind is the pins on the conversion harness. But they both check as per the OBD1 and OBD 2a diagrams. I also did a continuity check on both of them. This is beginning to be just plain retarded. I have until June 15th that's when I get neptune, and tuned.
Wow that's bizzarre. If I were nearby I would come and help you.
The only thing I can think of: Maybe some 5th gens had different distributors?
Have you replaced your cap+rotor lately? They do wear out over about 20k miles or so.
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I am having the same problem right about now I own a 99 Prelude. I have a fully built bottom end matched with a fully built head plus 5 angle job, 70mm TB matched to 70mm intake mani. I too am running a chipped OBD1 P72, I just got tuned w/ crome pro yesterday by Chris Harris of Xenocron.com. Tuning session was awesome but I am throwing CEL 9 also.
By the way I got tuned for N/A since the turbo is not on the car yet.
__________________ 2003 VW GTI 20th Anniversary Edition Big Turbo 2000 VW GTI Daily Driver 1999 Honda Prelude SH R.I.P 1-27-07 1997 Honda Prelude SH Sold 1996 Honda Civic Hatchback CX Sold 1996 Honda Accord EX Sold 1993 Honda Accord SE Sold
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