Join Date: 4th February 2014
Thanked 2 Times in 2 Posts
As Loxy mentioned its just guessing without datalog. Try to find some friend with flashpro or other diagnostic thingy and you can find out. It can read bad readings even on lower gear but you are not recognising it.
I guess it is something connected with fueling that is strongly connected with emissions and lambda readings on stock car. Also this is one of the disadventages when stock car with MAF cal. communicates with ECU. That is also the reason of slower throttle response because ECU according to MAF sensor burns some fuel, than asks lambda "is it ok?" after that ECU manage readings and inject some fuel and over again etc. And once cat converter is older or lambda sensor is burned due this faulty readings ECU restricts fuel.
But you mentioned when you have a lot of fuel it is going maybe right? Try some injector cleaner mixed with 100 octane fuel, full tank and go on ride somewhere if that helps. But I doubt.
Really hard to distinguish just by guessing...