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Old 1 Week Ago   #1
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Unhappy Backfire

Hello!


I have this little problem with my 1.2 8v 60HP... We are going on vacation with it to Hungary on friday. So I fixed a vew things, brake lines, brakes, oil change, sparkplugs, sparkplug wires and even coils. Magnetti Marelli coils. The clutch is fresh, gearbox oil as well... The car is almost brand new...


BUT... even before i changed the coils, the car started "puffing" from under the hood when i accelerate from low RPM's. It also won't accelerate that fast....



The sparkplugs and everything is OEM from the FIAT dealership.



Does anyone have had the same problem? Or any ideas? Is it injecting too much fuel? Do I need to adjust the fuel pressure on the injector?
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Fiat Mutlipla BiPower LPG 2000
Lancia Ypsilon LS 1.2 8V 1999
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Old 1 Week Ago   #2
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Re: Backfire

battled with my punto for days and had to realign timing marks on cam and timing belt pulley.
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Old 1 Week Ago   #3
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Re: Backfire

Yeah, I'd say the timing belt may have slipped a tooth or 2, quite common on these engines and thankfully not fatal as they're non-interference!
Good opportunity to renew the belt, and you may as well whack a new water pump and aux belt in there while you're at it.
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Old 1 Week Ago   #4
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Re: Backfire

Thanks guys,


Have done my waterpump and belt 15000 KM ago, Half a year ago... I think a leaking valve maybe. I happen to have a renewed cilinderhead laying arround... I might just change it. But i'll check the timing as well the belt is a little loose tho
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