HELP!!!!!

[zoomzoomboom]

Hi just wondering i have a 2.3 litre sedan 5 speed and let me tell you when i first start the car and take off in first gear i strech 1st to like 5.500 rpms man it goes but then after driving it for like 10 min first gear isnt the same anymore or shall i say the engine first gear once again i strech it the same to like 5.500 rpms and the car hesitates at about 4.000rpms and it has no balls engine just revs high and doesnt really go anyone know what the problem is ......Thanks

[bubba1983]

engine is at a warmer temperature...its normal..

[zoomzoomboom]

but its kind of funny its probably normal but its so much quicker when its cold............

[bubba1983]

yup, engines like the colder denser air

[MajesticBlueNTO]

cold start = open loop mode = engine running rich as hell = more gas = more power

warm engine not at WOT = closed loop mode = engine not running rich as hell = less gas = less power

[zoomzoomboom]

Hey majestic what do u mean open loop ?

[majic]

Originally posted by zoomzoomboom


Hey majestic what do u mean open loop ?


open loop vs closed loop

http://xs50.xs.to/pics/05410/open_closed_loop.jpg

in an open loop system the inputs are fixed, in this case A/F ratio is the same, thus while in open loop mode the car runs rich the whole time to help with cold starts

in a closed loop system, the inputs depend on the outputs or rather are controlled by the outputs. think of a thermostat as a closed loop negative feedback system. you preset the temp to 20C, it rises to say 23C and the A/C kicks in until it senses that the temp is still above 20C.

[active3s]

Hey, I\'m a new new guy here and I hope I\'m not out of place by suggesting a short ram for constant cool air. I found one for about 75 to 95 us dollars from CosmoRacing.com

[zoomzoomboom]

thanks for your help guys as for the short ram air thats a good idea but wouldnt it be worse cause its breathing the hot air around the engine.3s do u have one on your car and did it make a difference :)