b20vtec hondata s300 fuel cut or similar problem on hot engine


Stakis

Member
Joined
Sep 6, 2010
Messages
273
I am experiencing such a problem with my b20vtec:

when the car is just warm, everything runs flawlessly (about 1,5-2 laps in track), but just when the engine gets hot (oil about 95 degrees) it starts to show such problems: the car don't accept accelarator pedal. It only works on idle and on full throttle (pedal to the metal). But all the interval between idle and full throttle is not accepting accelaration. This looks like fuel cut. I have some ideas about TPS or maybe MAP sensor? or maybe problem can be in the ecu? I am using hondata s300. Tried to look for TPS readings and it seems that it works from 0 to 100% without problems. I recalbrated it in the hondata software, but this don't help. I have an idea, that maybe when everything gets hot under the bonnet, the TPS start to send bad signals and this lead the ECU to fuel cut?

I looked for AFR on full throttle and it seems everything is fine and working as it should, just when you want to use half throttle, you can't, because the engine is switched to fuel cut and it decelerates on it's own. You have to push full throttle and it goes like it should.

Maybe someone from you guys had similar problem or just can guess or advice how to solve, what to check,e tc.

Thank you.
 
Did you record any datalogs of when it's happening?
 
No, I don't. Will try to do this tommorow.

Everything was perfect before. So I am not sure if this is related with temperature (hot summer days) or with a defected sensor/wire etc.
 
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