rudypoochris Posted November 20, 2007 Share Posted November 20, 2007 I am just asking a general question here about some vehicles I have driven that were EFI equipped. I have noticed on downshifts some cars require you to almost floor the gas peddle to get the revs back up. These cars display nromal throttle response at idle and the rest of the time, but when it comes to downshifting it seems like there is a huge delay. What causes this? Are these cars pulling timing to save transmissions? I always lift off the gas completely then reapply it, maybe that is an issue for these EFI systems, staying on the gas partially may help. In anycase if anyone knows what I am talking about I would appreciate any information as this has been bugging me for a long time (I don't own any vehicles that do this, but I do drive them on occasion and it makes me want to shoot myself). Quote Link to comment Share on other sites More sharing options...
MrFancypants Posted November 20, 2007 Share Posted November 20, 2007 What kind of cars are they? If it's drive-by-wire I can certainly believe that everything would feel sluggish. - Greg - Quote Link to comment Share on other sites More sharing options...
Challenger Posted November 20, 2007 Share Posted November 20, 2007 Usually when you downshift your using brakes and using the vacume booster, therefore you loose some power/trottle response. Quote Link to comment Share on other sites More sharing options...
rudypoochris Posted November 20, 2007 Author Share Posted November 20, 2007 Well I know a 1.6L Fiat Marea and I think the current base model Honda Civic do it (only drove for a couple of seconds). On my EEC-IV Ford I have never noticed any loss of response, no matter what is happening incl. braking. Its just frustrating and I am wondering why it happens. Quote Link to comment Share on other sites More sharing options...
Challenger Posted November 20, 2007 Share Posted November 20, 2007 My dads Saturn Vue does it, Im assuming its the brake boster, but who knows? Quote Link to comment Share on other sites More sharing options...
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