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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!

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Ill check that tomorrow and let you know :thumbsup:

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.

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