hecticrb25 Posted August 19, 2007 Share Posted August 19, 2007 For some reason when i start my car up first thing in the morning it hesitates if i pump the accelerator a tiny bit untill its been on for about a minute or so. Lets say i start it up, its idling nice at about 900rpm, i pump it a tiny bit and it drops and fluctuates at 500-400 rpm for a second or so and then jumps up to 1000-1300 etc. Could this be the TPS, only thing i can think of as I swapped over to a Q45 throttle body (but used my old TPS that was on my old throttle body, came off a S1 RB25 so it was all good to swap over). Anyone know what the TPS should be reading at closed and at full throttle? And before you say it yes i have removed the water valve spring (valve that holds the throttle open a tiny bit untill warm water flows through to close it) Thanks! Link to comment https://www.sau.com.au/forums/topic/181493-hesitation-tps/ Share on other sites More sharing options...
Adriano Posted August 19, 2007 Share Posted August 19, 2007 I would try putting consult on it to monitor the sensors and check for trouble codes Link to comment https://www.sau.com.au/forums/topic/181493-hesitation-tps/#findComment-3296717 Share on other sites More sharing options...
hecticrb25 Posted August 19, 2007 Author Share Posted August 19, 2007 It has a PFC installed, anything i can check with the hand controller? Link to comment https://www.sau.com.au/forums/topic/181493-hesitation-tps/#findComment-3296721 Share on other sites More sharing options...
tek_01 Posted August 19, 2007 Share Posted August 19, 2007 also try cleaning the aac valve if you havent already theres a DIY in the tutorials section Link to comment https://www.sau.com.au/forums/topic/181493-hesitation-tps/#findComment-3296732 Share on other sites More sharing options...
hecticrb25 Posted August 19, 2007 Author Share Posted August 19, 2007 Yeah installed a Greddy intake plenum not long ago, AAC got a good clean while it was off Link to comment https://www.sau.com.au/forums/topic/181493-hesitation-tps/#findComment-3296736 Share on other sites More sharing options...
Adriano Posted August 19, 2007 Share Posted August 19, 2007 Is there anything else done to the car before we try to diagnose the problem? On the sens/sw screen there is an idle switch, make sure it goes on and off when you crack the throttle Link to comment https://www.sau.com.au/forums/topic/181493-hesitation-tps/#findComment-3296818 Share on other sites More sharing options...
hecticrb25 Posted August 19, 2007 Author Share Posted August 19, 2007 Ill check that tomorrow and let you know Nothing else really done, only started happening when i installed the greddy plenum, idles fine so cant be the plenum installation only happens when the accelerator is depressed which is why i assumed it might be the Q45 TB or TPS. It just seems a bit odd that it only does it when its dead cold, meh. Link to comment https://www.sau.com.au/forums/topic/181493-hesitation-tps/#findComment-3296835 Share on other sites More sharing options...
hecticrb25 Posted August 20, 2007 Author Share Posted August 20, 2007 yeah the switch goes on and off as i crack the throttle. when its on for a bit it is fine, its only on the initial startup... never happened before i had the standard plenum\TB on. Link to comment https://www.sau.com.au/forums/topic/181493-hesitation-tps/#findComment-3298816 Share on other sites More sharing options...
QWK32 Posted August 20, 2007 Share Posted August 20, 2007 what is the tps voltage when you aren't pushing the accelerator? round 0.4v - 0.5v is good. Link to comment https://www.sau.com.au/forums/topic/181493-hesitation-tps/#findComment-3299125 Share on other sites More sharing options...
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