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Discussion Starter #1
Ok guys looking for some help....car is an astra h vxr, the car just doesn't seem to be running right. Sometimes when accelerating from 2k/3k revs the car doesn't pull very hard its bit like turbo lag it will accelerate and go through the rev range but not as strong or quick as it should. And often then when changing gear it'll pop or bang and jolt then again in next gear it doesn't pull as hard as it should. Thing is it only happens sometimes and other times it'll pull fine and accelerate as it should, also this only seems to happen in normal mode when using the sports mode the car runs fine everytime and pulls hard in all gears from all revs and never has any issues....

The car has recently had a new rear o2 sensor, turbo actuator, and front boost solenoid, and new spark plugs.
Car has no warning lights on and nothing showing up on diagnostic.

I can't think of what might be causing the problem and why it's only affecting normal mode and only occasionally,

Anyone got any idea's / advice ?
 

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Discussion Starter #3
No its completely standard and all replacement parts have been original exact replacement items that came as stock on car.
 

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Incorrectly set actuator has my vote (being as it has been replaced and the only part that id adjustable and needs to be set right)

Was the car scanned for these faults andhadthese faults clearly from the memory?
 

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Discussion Starter #7
Sorry should have said, the new actuator was set incorrectly originally but has since been set up right. All original fault codes have been cleared after any work carried out and none have come back since.
 

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Discussion Starter #10
Car has covered around 500 miles since repairs carried out and fault codes cleared and no codes have came back and nothing showing as pending either.
 

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Helps regulate fuel pressure and boost, do the bypass mod and see if it improves the car.
 
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