Operating Temperature Question

Chuck713 · Post by **Chuck713** » Tue Apr 07, 2009 10:46 pm

So I got back my ECU for the 06-09 Kraftwerks relflash and now the operating temperature seems to be really jumpy! The heat if i have it on is intermittent it jumps from cold to hot to luke warm to cold and finally the fans wont be spinning even after i reach regular operating temp? What is the standard for the reflash for the operating temp? The stock 06+ for S2000 was at 8 bars. IS it on my end or was something on the relash wrong? the operating temperature while I'm cruising is about 9 to 12 bars it jumps up and down and i have no idea whats going on?

Post by **Hondata** » Wed Apr 08, 2009 7:39 am

What vehicle do you have? When you say the heat changes, do you mean that the heater output air temperature changes?
From the information it sounds like air in the cooling system. Did you break / drain the cooling system?

Chuck713 · Post by **Chuck713** » Wed Apr 08, 2009 1:37 pm

I have a 07 s2000. The water temperature gauge flips out on me sometimes it will stay at the normal operating temp of 8 bars and sometimes it jumps up to 11 to 12 bars. I did drain the cooling system but i'm 99% sure i bled the air out of the system after i filled the radiator back up.

Post by **Spunkster** » Wed Apr 08, 2009 2:24 pm

You should try bleeding the system again as it sounds like you may have some air bubbles still.

Chuck713 · Post by **Chuck713** » Thu Apr 16, 2009 9:13 pm

hey i did rebleed the system and everything is back to normal but i do have a couple of other questions. I have been driving around with the Kraftwerks high boost kit now for about 2 weeks now and i have noticed that when i start the car up and the engine is hot or had been running for sometime and hadn't cooled off yet that the ignition starts to bog down when i start up the car. Also I noticed when push the car and the RPM's get to about 7900-8000 it seems to hit the limit i thought with your reflash hat the rpm limit had been moved up to 8500? Has that changed? Also when i did hit about 7900-8000 rpms and kept it there for a sec longer waiting to see if it would go a bit further the CEL came on and then when i shifted it turned off is that something to do with ur reflash? Later when i tried it again to see if that was a fluke this time the CEL blinked on and off for about 5-10 seconds after i had already shifted. I became instantly worried and pulled over and turned off the car and checked the engine but nothing seemed to be out of place or anything else major. Afterwards the car seemed to run fine but it still spooked me a bit. I'm going to get the CEL checked out tomorrow and I will post any codes if it does come up.

Chuck713 · Post by **Chuck713** » Fri Apr 17, 2009 9:53 pm

I don't have a K-Pro I have the standard hondata/Kraftwerks S2000 High Boost reflash. I wanted to know if the rev limit had been changed from what was advertised which i believe was 8500 rpms and secondly if there was a reason my CEL light came on as i reached about 7900 rpms

Hondata1 · Post by **Hondata1** » Mon Apr 20, 2009 10:00 am

At Kraftwerks request, the rev limit was changed to 8200 RPM some time ago.

We have no idea as to the cause of the check light. You will need to connect a scan tool and read the code.

The rev limit is lowered if the car is stationery or engine cold.

Intake manifold Heat soak will mean the car cranks with more fuel. Install the Hondata Heatshield Gasket and try cranking with the throttle at WOT to allow more cold air into the intake.

Do not hit the rev limit and keep it there. It is bad for the engine.

geoffrey70 · Post by **geoffrey70** » Tue Apr 28, 2009 10:09 am

I'll reply for him as he's a good friend and the problem is still present.

Hondata1 wrote:At Kraftwerks request, the rev limit was changed to 8200 RPM some time ago.

We used an OBD2 port scanner/datalogger and the ecu shows the car hitting upwards of 8350rpm's before a shift, and this is not hitting redline. The weird part is that the car's tac showed a little if any over 7900.

Hondata1 wrote:We have no idea as to the cause of the check light. You will need to connect a scan tool and read the code.

The scanner would not read the code. With the CEL flashing, and the scanner installed, it says there are no error codes.

Hondata1 wrote:The rev limit is lowered if the car is stationery or engine cold.

This is with the car 180-190deg.

Only thing aftermarket on the car is the clutch. It's using an Ap1 flywheel, ACT hd pressure plate, and new oem disc/bearings. The clutch was installed two weeks prior to the SC and the tac was not affected during this time. Installed the SC and now the tac shows the limiter is 7900, but the car is hitting high 8300's, almost 8400.

Hondata1 · Post by **Hondata1** » Tue Apr 28, 2009 11:13 am

Well it would seem that the car's tach is incorrect (this is common). A datalogged value is more accurate than the tach. Under hard first or second gear operation it is common so see the rev limit overshoot by one or two hundred rpm.

Hondata changes nothing to do with the water temperature operation in the reflash.

Does the error code occur when scan tool is unplugged. Sometimes the tool itself can cause the CEL to flash.

geoffrey70 · Post by **geoffrey70** » Wed Apr 29, 2009 6:17 am

Hondata1 wrote:Hondata changes nothing to do with the water temperature operation in the reflash.

The cooling is perfect now. It had a bubble somewhere in the line that worked itself out the next day.

Hondata1 wrote:Does the error code occur when scan tool is unplugged. Sometimes the tool itself can cause the CEL to flash.

The scan tool did not cause the CEL. The problem would occur in the very upper rpm, right before a shift, slowly blinking(two or three times-i cant remember) lasting for 5-10seconds, but the ECU would not store a code. We used the scan tool to try and read the code while the CEL was blinking and got nothing.
I believe that he figured out the problem happens less with the VSA disabled, but he'll have to comment on that.
We're not really sure what to check anymore... Everything is exactly how it's supposed to be.