K-pro'd ECU motherboard problem?

[shinichi]

- serial number: 05008959
- KManager version: V.1.5.1
- the calibration: N/A (See description)
- a datalog of a problem: N/A (See description)
- 2002 Acura RSX Type S
- what sort of ECU you are using: 37829-PRB-AO8
- Supercharged 9psi, 750cc injectors

The K-Pro was purchased off a member on k20a.org whom had the ecu rebuilt by Hondata in January of this year, hence the newer k-pro number 8959. I've had the k-pro since February 2011 and the issue as explained below occured June 13, 2011.

So a in-depth summary of my problem. Approximately 2 months ago at a local track day i was running my second session of the day, and as soon as i got into the pits after my session was over i hear my car begin to splutter. I shut the car off and leave it to cool for 30 minutes before my next session.

When my session is about to begin, i fire up my car and my CEL starts to flash (wasnt flashing before shutting car off) and my car begins to splutter and bog, sounding like a subaru. I immediately think its misfiring, and scan the code with an OBDII Scanner. The scanned codes are:
P0300 Random Misfire, P0302 No. 2 Cylinder Misfire, P0304 No. 4 Cylinder Misfire. Clear the codes, Pull out the spark plugs, swap the plugs to see if the misfire changes, it doesnt change. Clear codes again, swap coil packs, misfires still on 2 and 4.

So i try to limp the car back home, and about halfway the car dies completely. Fuel is dripping out my exhaust pipe, i assume the 750cc were flooding the cylinders. So i get the car towed home, and let it sit for a few days with spark plugs removed to try to dry out the cylinders. Come back a few days later, and with new spark plugs try to fire it over. once again its misfiring with my CEL light on. drive the car into the garage (roughly 40 feet) and once i shut off the car, i can immediately smell gas and see fuel dripping out my exhaust pipe again.

Since my cylinder 2 was low on compression, i rebuilt the engine over a months time, and borrowed a working set of coil packs to try to run on the first fireup. Also had the injectors tested to see if they were stuck open. The tests results showed them as working fine. First fireup, my car wouldn't fire over. What it did was it made huge clunking noises as the engine tried to fire over (full battery charge, so not due to low battery), and after maybe 5 seconds of cranking the engine over the 750cc injectors were pumping so much fuel into the engine it was dripping out the exhaust pipe again.

So i decided to swap to the stock 310cc RSX injectors, still made clunking noise and flooded the cylinders. Decided to remove k-pro ecu and put in oem ecu back in. After a few seconds of cranking over, the car fires up, and operates normally. Drove around for a few minutes to try to clear the cylinders of any unburnt fuel, and came back and scanned the engine light (OEM ecu), the only codes that came up were secondary O2 sensors (test pipe).

Decided to give k-pro another go. Uploaded a stock map with immobilizer disabled, tried cranking it, it made a loud clunk, and car wouldn't crank over. Fuel once again dripping out my exhaust pipe. Not wanting to wash out my piston rings on a freshly rebuilt engine, i took the ECU out, and have been driving on my OEM stock ecu.

Sorry for the long post. Wanted to explain my situation in as much detail as possible. Could the problem be caused by the motherboard of the ECU? My laptop still recognizes the k-pro and i can still upload maps. just the car doesnt run properly and as of late won't start the car at all period.

Any help would be appreciated, thanks.


Cliffs: Car began misfiring after a track evening. Rebuilt engine, still misfires, swapped k-pro ecu for stock and it runs fine.

[Spunkster]

Go to Online, Tools and clear security, when that finishes, close the program and reopen it. Then go to New CAlibration and load a new base calibration and make sure you disable the immobilizer, then upload and see if that resolves the issue.

[shinichi]

Tried clearing security, and reuploading stock map with immobilizer disabled. No change. Still clunked when cranking over, and cylinders flooded with gas again. I can smell fuel in my garage at the moment.

I took a video of trying to fire it over, with the clunk sound. will upload and post it up.
Any other suggestions? or would it be easier to just send it in for you guys to test it out?

I should note. I can still datalog and the k-pro still connects to my laptop, It just doesn't start and it floods my engine with gas

[Spunkster]

Are the injectors high or low impedance?

[shinichi]

310cc's are OEM rsx injectors, which i assume are high impedance? The 750cc's which i initially had installed were high impedance as well

[shinichi]

Seeing as i'm really wanting to get my car up and running again to track, would I be able to just overnight you the k-pro unit and have Hondata diagnose it? I'm not too sure if i'm supposed to ship the ecu directly to you or to a dealer first? There's unfortunately no dealers locally for me so either way i'd have to have it shipped out anyways.

[Spunkster]

Please send an email to support <at> hondata.com and include a link to this post. Include a detailed description of the problem and serial number and we will give you further instructions.

[JacOOLito]

Hello, just want to find out if the problem is ever fixed or figured out. I'm having the same situation right now. My car also has JRSC. The only difference is I'm not pulling any DTC's. Tried also an OBD2 scanner, nothing.

My battery is pretty new, not even 6 months, and is a generic one I got from Costco. I will be trying to put a different battery later and will be checking all my ground wires. I'm just clueless without the error codes, I'm hoping its just a bad ground.

Thanks!

[Spunkster]

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