kpro problem

[Rustywaffle]

well as a couple of you know...i have acquired the piece of equipment which is highly desired... kpro...

awesome, yes? NO....

ever since i got it i have been having problems with it.  first the car wouldn't shut off for like 10 seconds when i removed the key, i called cham, he told me to cut a wire controlling the ignition, i did.... that worked.. car shut off now.

then i uploaded a premade tune, started her up and it started fine. took her out for a drive, and it wouldn't rev past 3200 rpms... and the a/f was perfect... 14.7 at idle, and around 13.5 at WOT.. talked to cham about it, and told me to upload the basemap tune, did that and the same thing was happening.

i then put the car back to stock, and shipped the harness out to cham to take a look at it, apparently there was a cracked wire at the base of the connection.  when i got the harness back, i installed it again and uploaded the premade tune again.  took it out for a drive, and this time it wouldn't rev past 3500 rpm.

fuming, i put it back to stock again. thinking it was the kpro unit itself i talked to skip about it, and he agreed to troubleshoot the kpro unit itself on his car.  I was told the unit worked perfectly on his car...*scratches head*

I receive the unit back from skip, install it and upload the tune again... and again the same fucking thing.... won't rev past 3500rpm.

i am befuddled now...i reallly want to get this shit resolved, im tired of switchin my shit back to stock every couple of days



any of u gurus out there... i would greatly appreciate ur help

[ADI]

when skip did the touble shooting on his car did he use the same harness u used and were having problems with?  or does he have his own?

[Rustywaffle]

na he has his own.... im auto, he's manual...


the harness was the last thing i could think of... if only i could get ahold of another auto harness... then that way i'd know for sure...

[timot_one]

There could be an issue with the harness if the kpro is running fine on Skippy's car.  I remember him telling me about this problem.  I am actually having a similar issue where my car will not rev past 6200.  I'm waiting for Cham to get back to town so we can troubleshoot my kpro and harness.  If you want to send your harness and kpro up here, I can help Cham work on it to see if there is anything we can do to fix your problem.  I'm sure we could find someone with an AT to test it on.

[Skippy]

I know you're having problems with it, Rusty and I'm sorry to say that it worked fine in my car.  I was really hoping I could help to diagnose your problem.

One piece of information that is of particular importance is that the VSS signal reads a constant 45 or 49mph when Kpro was running in my vehicle..even at idle.  This may or may not have anything to do with the problem.  My best guess as to what is going on is that the stock ECU may be flipping out because it is having communication issues and it may be trying to put the car into limp mode.  I recently had a VTC problem (malfunctioning solenoid) and my car would not rev above 3500 RPM.  I know you are not having VTC issues but limp mode is something to think about.  The only problem is that your OBDII port probably will not be able to provide you with the communication error codes or other information relating to the transmission.

[neoryan7]

did you connect the vtec solenoid switch in the engine bay?

[timot_one]

I'm not sure how it would act with an AT, but an issue with my harness that affected my vtec solenoid when we first installed it.  It turns out that on the harness, one of the pins on the molex connector that plugs into my kpro'd ecu didn't have continuity with the wire on the harness.  We re-pinned the harness and it worked properly.  It may be worth having you send your harness up here to have it tested and repaired.  Like I said, I'm glad to help you out if you need assistance.  Considering that Skippy ran your kpro without any issues, my guess is that there's something going on with your harness.  I'm not sure if you can test all the leads for continuity from pin to pin, but that's where I would start.

[Rustywaffle]

did you connect the vtec solenoid switch in the engine bay?

yes

[Rustywaffle]

and tim... i think i mite do that. i will put it back to stock tomorrow, and once i do, ill get ur information and send it ur way

[neoryan7]

i tried tapping my vtec solenoid with the quick connects and it didn't have continuity. i had to buy a socket from acura and directly connect it to the solenoid. if your interested its the acura tsx 2006, the connector for their parking light. Make sure to get the pigtails also.

[timot_one]

Yeah, just PM me if you want to send me your harness and your kpro.  We can test it on my car.  I think Cham should be back here by next week, but I know I can test your harness for continuity before he gets out here.  I'm not sure if you want to send your kpro also, but we can take a look at that too.

i tried tapping my vtec solenoid with the quick connects and it didn't have continuity. i had to buy a socket from acura and directly connect it to the solenoid. if your interested its the acura tsx 2006, the connector for their parking light. Make sure to get the pigtails also.

Good advice.  I remember Skippy had a continuity issue when he used the wired his vtec solenoid with the appropriate connector, but had quick connects on the wires that he passed through the firewall.  Once he soldered them, it cleared up the issue.  I have another connector that is soldered to the harness and other than the pin on the harness being messed up, I haven't had any issues.

[Skippy]

I know it's painfully obvious and I'm not intending to insult anybody's intelligence here, but if Rusty sends his harness and Kpro up to you guys, you'll need to make sure you have an AT vehicle to troubleshoot with.  The issue is the communication between the ECU's...since newer accords use a common computer to control the engine and transmission, that's why we're having issues.  If the PCM were a separate unit, we would not have this problem.

I'm sure this was a problem shared by our "buddies" over at Hondata when they were developing their version of our harness for the TSX.  I hate to say it...but it would probably be in your best interest to hold off sending your equipment off to Cham and Timmy for diagnosis.  I would suggest emailing Hondata and describing your situation to them.  Even though they did not impress me with how courteous they were on the phone (and I hope they're reading this), they would be able to tell you what they did to overcome the issue because I KNOW THEY HAD TO HAVE THE SAME PROBLEM THAT YOU'RE HAVING.  Trust me...I've got a hunch here...and Timmy knows I'm on to something when I've got a hunch....

[neoryan7]

On my auto it never goes past 4k at WOT unless im in D3.

[timot_one]

Rusty, when you're on your OEM ECU what do you go up to?  Is it 4k like Ryan?

Although this may not be the same problem, I just wanted to provide some insight with the experience I had.  I had a similar issue with my kpro, where my redline was set to 7000, but my revs would limit at 6250-6500.  I tried replacing the kpro, then replaced the harness, yet I still had the problem.  We used a different MAP and the problem went away.  Considering your kpro is working fine, and that Cham fixed your harness, it may be a tuning issue.  I'm not saying that this is definitely the problem, but it's another thing to look into.

[neoryan7]

^ I should have clarified. When I'm using the kpro under WOT in D the highest RPM is 4000. Even though on the tune it is set to 6500. Could be a bad tune because on autos they are tuned in 3rd I believe and the problem never presents itself until under real world driving. OR Honda's grade logic transmission programing might have something to do with it. Just throwing out my situation so maybe we can collaborate b/c auto K-pros are very rare.