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astra hesitation

416 views 0 replies 1 participant last post by  kev astra 1.8 
#1 ·
hello im new to this site

I have a mk4 astra 1.8 16v sport and the car has developed a few probs firstly when you accelerate in the morning after just starting the car the engine has a flat spot at 1.5k rpm then clears. and when accelerating either when cold or warmed up the car hesitates and lacks power. and finally when you go up to about 5.5k the engine torque tails off then at 6k it gets an extra bit of power any help on what could be causing this would be great. my car did have a unichip, highlift cams and an uprated fuel pump in but all got taken off and reverted bak to norm and also got a new wiring loom because of the ecu wires being soldered.
 
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