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Misfiring 991 997.1

brian.pilgrim said:
Please can someone help!!!. My porsche 911.997.1 2007, keeps misfiring, the garage has checked for bore score, changed the timing chain, replaced a bent valve, replaced the wiring loom, spark, plugs coil pack have all been changed, it's been going on for 3 years. I'm going crazy. Please help !!!
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Where are you
Are you using a reputable Indy (or OPC)
Members on here will advise of their local indy. If its been going on for 3 years you should have tried a different on 2 years ago.
Is it actually a Indy that is known for Rear engined Porsches
Lots of thing - wondering what damage could have been caused bu a bent valve (And what caused it )
Where the correct Plugs and Coil packs fitted and TIGHT
Fuel Filter ?
Run a tank full of V Power through
Lots of thinks
Where are you going tomorrow
You can buy a Analyster yourself

If you wre in West London go to AMS Porsche, in Hertfordshire How much have you spend on FUEL over the last 3 years - Best it something really simple
I had a 986.1 Boxster son in law change the plugs and Packs (I always do my own maintenance) after 4 months it started occasional miss fires (Eventually turned out to be a loose coil pack )
Good Luck
 
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