Hi, i have a UK CTR and a US RSX KPRO and the RSX oxygene sensor.
I have a problem, i am using my car at 3000 rpm (a bit more a bit less maybe), when i release the throttle, the RPM go down very very slowly, sometimes the rpm dont go down from 2000 to idle, when i stopped the car with brakes, the rpm goes down to idle.
What is the problem?
My car :
Disabled cat, 60mm exhaust and muffler, custom made cold air intake system, thats all.
With the stock ecu, there isnt a problem like this.
RPM go to idle very slowly
First, the idle when the car is moving is much higher than when stationary. The idle hanging high is a product of improving the part throttle volumetric efficiency of the engine, and adding timing (see below).
Second, remove a lot of timing around the idle part of the ignition tables up to 2000 rpm. You should only have to do this on the 0 degree cam table, but you may need to datalog and check the cam angle is 0 when slowing down. If the cam angle is more than 0, edit the cam angle tables to 0 from idle to 2000 rpm in columns 1 to about 5. Start by retarding a couple of degrees, and then keep going until the idle settles down - don't be scared to retard by 10-20 degrees in some places, and long as the area in the ignition tables are not normally used while driving (again. datalogging will tell you this).
Third, check your TPS reads 0 or -1 at idle. If it does not, remove and replace the security screws, then rotate the TPS until you get -1 or 0 at idle.
Lastly, post a datalog of the problem and your calibration if the problem persists.
Second, remove a lot of timing around the idle part of the ignition tables up to 2000 rpm. You should only have to do this on the 0 degree cam table, but you may need to datalog and check the cam angle is 0 when slowing down. If the cam angle is more than 0, edit the cam angle tables to 0 from idle to 2000 rpm in columns 1 to about 5. Start by retarding a couple of degrees, and then keep going until the idle settles down - don't be scared to retard by 10-20 degrees in some places, and long as the area in the ignition tables are not normally used while driving (again. datalogging will tell you this).
Third, check your TPS reads 0 or -1 at idle. If it does not, remove and replace the security screws, then rotate the TPS until you get -1 or 0 at idle.
Lastly, post a datalog of the problem and your calibration if the problem persists.
Hondata
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dbkserieseg
- Posts: 6
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Hondata wrote:First, the idle when the car is moving is much higher than when stationary. The idle hanging high is a product of improving the part throttle volumetric efficiency of the engine, and adding timing (see below).
Second, remove a lot of timing around the idle part of the ignition tables up to 2000 rpm. You should only have to do this on the 0 degree cam table, but you may need to datalog and check the cam angle is 0 when slowing down. If the cam angle is more than 0, edit the cam angle tables to 0 from idle to 2000 rpm in columns 1 to about 5. Start by retarding a couple of degrees, and then keep going until the idle settles down - don't be scared to retard by 10-20 degrees in some places, and long as the area in the ignition tables are not normally used while driving (again. datalogging will tell you this).
i only get 81 percent tps.....how do i fix that ????
Third, check your TPS reads 0 or -1 at idle. If it does not, remove and replace the security screws, then rotate the TPS until you get -1 or 0 at idle.
Lastly, post a datalog of the problem and your calibration if the problem persists.
K20EG6 -DBKswaps!!!