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Car still running badly (Help Please)

I got my exhaust done on friday, its a straight through from the downpipes (no cats or silencers)

 

Picked the car up and drove it about for a day and everything was fine!

 

All of a sudden the car started idleing very badly and keeps cutting out on idle!

 

Iv checked the following items

 

Resetting the ECU for the exhaust system, cleaning the TPS and its not a vacuum leak either!

 

I got a mechanic to quickly look over the car and he mentioned that he thinks the timing might be out!

 

Does any1 have any ideas what is up with my Zed as time is dearly running out!

 

Could the spark plugs be at fault here!

 

He also mentioned its miss-firing alot!

 

GUYS ANY1 HELP ME PLEASE

 

Fas

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    check the water temp sensors. They can cause huge problems if its not working correctly

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    are all your coil pack connected? go round pushing them in - can't atach a picture of where they are as I'm at work, but maybe someone else will. Also any vacuum pipes flapping around?

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