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b8 S5 v8

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Old 04-23-2016, 07:33 AM
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Default b8 S5 v8

my car had a intake valves cleaned and the whole engine was down. in the process coil, plugs and some injectors were replaced.

i can hear flapping sound coming from my dash. and it sounds like the cams timing? this happens after 4k rpm.
now, it keeps getting misfiring error at 5-8 cylinders
02 oxygen bank 2 error which might be due to catless catalyst converter.
car cranks weakly which i have also replaced the battery

all of this was due to 1 bad injector that squirts fuel even when ignition is off. causes engine overfill with the fuel. EPC + Cell came on then.

im in a dilemma to have the engine remove again. because its alot of labour + hours.

anyone had the same problem before?
Old 04-23-2016, 09:02 AM
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Default Well, wrong forum. I feel for that rear timing chain engine!!!

Originally Posted by humblefive
my car had a intake valves cleaned and the whole engine was down. in the process coil, plugs and some injectors were replaced.

i can hear flapping sound coming from my dash. and it sounds like the cams timing? this happens after 4k rpm.
now, it keeps getting misfiring error at 5-8 cylinders
02 oxygen bank 2 error which might be due to catless catalyst converter.
car cranks weakly which i have also replaced the battery

all of this was due to 1 bad injector that squirts fuel even when ignition is off. causes engine overfill with the fuel. EPC + Cell came on then.

im in a dilemma to have the engine remove again. because its alot of labour + hours.

anyone had the same problem before?
The timing belt service on the front timing belt V8s was bad enough, but having to pull the engine to replace timing chain and tensioners for the V8 A4/5 must be a real pain.
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