Rep Power: 0

I am running a Hondata Kpro PPA ECU on a stock D17A1 motor right now. It drives perfectly fine for everyday purposes. Proper idle, no hesitation, etc. The issue occurs when I go wide open throttle in any gear to the redline. Usually between 6200rpm and 6500rpm, the engine will just die and I will come rolling to a stop. Feels almost as though there is no more fuel or no more spark. It does this regardless which gear I am in.

Datalogs show the fuel pump relay to be on and injectors to be shooting fuel. The ignition numbers are also showing action. It doesn't always give me this problem, but it does happen very often (at least half the time). I managed to datalog it in first and third gear.

Anybody have any clue what this could be? It only happened after I installed the Kpro.

 
Rep Power: 424

is the car cold when it does this??? Just wondering, because unless my car is fire hot, it'll throw me a boost cut... may or may not be similarly related... mine doesnt shut off.

Did you start it with the right base map? and has it been tuned yet?

 
Rep Power: 280

I think wikkaco0 is super stock, no mods.

 
Rep Power: 259

^^ why would u say that? just wondering..this will get interesting

 
Rep Power: 388

^^ usually you know if ppl have a lot of mods kuz they ask about them, update people on the install, post up in their sig or profile what they got... etc.

 
Rep Power: 297

Probably the boost cut feature being set wrong. I know other Hondata stuff will do just that. If you have it set wrong I'd bet the K pro is cutting fuel and spark.

 
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Like I said, the motor is stock for now (super stock w00t I like that one haha). Unless of course you consider a aftermarket intake a big deal modification... I need to get the engine management setup before I go ahead and take apart the rest. It's running on the basemap provided for my stock motor, my motor is very stock.

The car was warm whenever I reved it up. Coolant temperature was a nice 80-90 degrees celcius.

Also, I can start the engine up again just by putting it in neutral, foot on the clutch and starting it with the ignition key cylinder. ON > START > ON. The key doesn't need to be turned to OFF or ACCessory first.

 
Rep Power: 297

that definetly sounds like the boost cut feature. Check that out. If you arent boosted, either disable the feature or set it at like 2 psi or something andd you'll be all set.

 
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I'm beginning to think it is the boost cut feature aswell. It is set to about 1650mBar right now (comes like that). I know my engine does about 1000mBar at the MAP sensor when wide open throttle. Perhaps it's a faulty MAP sensor. Going to try disabling the boost cut feature tonight after work.

 
Rep Power: 0

Boost cut feature disabled. Problem solved.

Datalog shows MAP pressure never exceeded the boost cut limit though. Makes me wonder what happened. Could it be a faulty MAP sensor?

 
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Problem resurfaced even with boost cut disabled argg!
My car hates me this week.

 
Rep Power: 0

Could a valvetrain timing issue cause this?
That's the only thing I took apart in the engine bay.

O2 sensor voltage suggests a fuel cut when the engine dies.
Perhaps a bad ECU?

Hondata KManager ECU information window says
"Firmware OK .... No"

Tried erasing ECU and uploading calibrations again, didn't fix it.

 
Rep Power: 350

Check your coolant temp cut feature. It may be set too low. What map are you using?

 
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The coolant overheating temperature was set at 104 degrees celcius and force radiator fans at 95 degrees celcius. Either way the engine never went over 90 degrees celcius. Boost cut disabled by setting it to 0 kPa was instructed in the user guide.

No check engine was triggered, in fact there were no change in any of the lights on my gauge cluster when the fuel is cut.

Currently using the base map for the D17A1 with narrowband. (stock denso map sensor if that was what you were asking)

 
Rep Power: 279

Its probably a lean cut issue.

 
Rep Power: 350

No, there's something weird going on. I've experienced this, so has boiler.

Answer this. When the engine cuts, can you stomp the throttle again and have it respond or is it just dead until you get under 2k?

This is the way to tell if its a "protection" feature or not. When you hit a protection that is set on kpro, it will cut fuel until it sees under 2k rpm and there will be no throttle response before that. What I've experienced, as well as boiler, is that it will respond to throttle again immediately after which tells me it isn't a cut feature.

I've talked to doug about it and the only option is to get some datalogs and send them to him. So if your car is still doing it regularly, get some logs and send them to tech support with your map, I'll do the same.

 
Rep Power: 279

Maybe its just a D-seires issue with WOT.. have you checked the TPS reading?

 
Rep Power: 0

Don't have lean cut. Lean cut requires a factory wideband oxygen sensor which my Civic does not have. So it's a greyed out option in KManager.

The fuel is cut untill I restart the engine from the ignition key. There is no throttle response when the engine cuts, even under 2000rpm. Will just roll to a stop with my foot pressing throttle all the way.

Throttle position sensor is good, nothing out of the ordinary there.
One of my datalogs is there with this post.

Also I contacted Hondata support and sent them my calibartion and datalogs. They just tell me to go see my Hondata dealer (AutoLaminar Montreal Canada) because they installed the Kpro in the ECU.

 
Rep Power: 350

Wish I had some better advice for you, I have no clue what would be causing that.... Maybe try posting in hondata's forum or possibly send the ecu to them for a check. What do you mean they installed the kpro in the ecu? Hondata didn't do it?

 
Rep Power: 0

Nope, AutoLaminar is authorized dealer and installer. Check Hondatas dealer list.

Thx, for the advice... but I'm suspecting a bad Kpro board or bad ECU.
The ECU was from a scrapyard so I never tested it, though those things are almost never bad. Well at least the ones newer than 2000 with sealed capacitors are almost never bad.

The ECU information windows in KManager that says "Firmware OK - NO" is really not looking good.

 
Rep Power: 279

Why dont you have an 02 sensor?

 
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I have the stock narrowband O2 sensor on my 2002 Civic.
Only the 04-05 came with the wideband O2 sensor.
All the USDM K series I believe came with the wideband sensor.

Either way, closed loop / open loop operation wouldn't affect the issue I'm having.

Oh and it even cut fuel today when I was cruising between 2500 and 3000rpm.

 
Rep Power: 350

I just checked your datalog and from what I see is at about 12 seconds, your rpm is going from about 1600-3k rpm and there is no reading on the tps and the map is reading no load (decel vacuum). What's weird is that even though it isn't reading the sensors, its still continuing to rev. I would try to reload the map if you haven't already.

 
Rep Power: 0

Tried reloading the calibration after erasing the ECU.

At 12 seconds, I shifted it back into gear. So the drivetrain and car motion spun up the engine to about 3000rpm. As soon as my speed decreases till the end, there is no fuel/combustion going on. It's just coasting.

I'm going to take it to the shop on tuesday to see what they can do. Get them to check the ECU also.

 
Rep Power: 0

Ok. Some progress...

The new version of KManager is giving me a useful diagnostic code. Previously I would always get ELD voltage too high in my datalogs. That's ok, that really doesn't matter. Now it says P1361 TDC sensor intermittent interruption instead of the ELD voltage warning.

Being that I had to remove the TDC sensor during the cam pulley install, it may have been damaged. My question is, can a bad TDC sensor cause the engine to cut out all power the way it is doing now without ever illuminating the check engine light?

The code P1361 is supposed to be a temporary code and I only noticed it in KManager 1.2.2.5.

 
Rep Power: 350

Absolutely. Try starting the car with that sensor unplugged and see what happens. Replace it or check the wiring and see what's up. That's why I keep like at least 2 spare of every sensor on hand at all times lol.

 
Rep Power: 0

No surprise, the car refuses to start with the TDC sensor unplugged. KManager only shows intermittent TDC sensor signal when looking at old datalogs from version 1.2.2.4 (current version 1.2.2.6). When recording new datalogs with 1.2.2.6, it shows ELD voltage too high.

Maybe my TDC sensor is good, I don't have another one to test with.

 
Rep Power: 279

ELD.. if thats bad you have to replace your whole fues box... *in engine bay, i know trust me lol* ... but i dont think that would be the problem...

What spark plugs are you using?

 
Rep Power: 350

Yeah, I knew it wouldn't start. Try datalogging and check your actual battery voltage, see what its giving you. If its spiking, it may be shutting off injectors to prevent damaging them. But if that's the case and the eld is bad, it is built into the fusebox...

 
Rep Power: 0

Using the original spark plugs that came with the car. I've done 69000km since I got the car in 2002.

When cranking with the TDC sensor unpluged i didd't get any odd voltage spikes. Consistent around 11volts when cranking.

I don't think an ELD problem could cause my car to cut out the engine somehow.