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Promax chip

Ok more finding today. Did maybe 100 miles today on motorway A roads and in town. The car is much much smoother than before, the power delivery is much improved and the car is much more responsive than it was before. I didn't really think about it till I jumped into my TDi ( 150 bhp ) mk 7 Golf to pop into town. It felt life less and lethargic compared to the 44. Thats the first time I've ever felt that in the Golf. So big praise for the chip.
But also a down side........
When you try to start the car from hot it won't catch and fire up. It feels like it's not getting fuel. You need to pump the throttle to get it to catch, then when it catches it's as smooth as you like. Could thus be the FPR acting up as it's being asked for more than it wants or could it be something else.
 
Hot starting can be caused by the non return valve in the fuel pump letting the pressure drop off too quickly then the fuel boils in the injectors causing hot start issues

fuel under pressure does not boil so easy, should take about 15-20 mins for the pressure to drop right off
 

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