lewissykes81
26-01-2013, 08:10 PM
Hi i have a 2003 audi a4 2.5 tdi v6 180bhp b6 model.
There is air getting pushed back through the air box and it sounds like a dud or bop bop bop bop sound, i got told it would be a valve stuck open on the engine, i tryed putting cleaning stuff in the fuel, and i just put piston ring and valve cleaner in the oil then serviced it but still no difference. I put egr valve spray through the airbox which made it alot better for about a week, but then sound is back again, also had a cylinder test done and all seemed ok except one was slightly slow. Any help on what else it could be? or how to fix it with out the head coming off.
There is air getting pushed back through the air box and it sounds like a dud or bop bop bop bop sound, i got told it would be a valve stuck open on the engine, i tryed putting cleaning stuff in the fuel, and i just put piston ring and valve cleaner in the oil then serviced it but still no difference. I put egr valve spray through the airbox which made it alot better for about a week, but then sound is back again, also had a cylinder test done and all seemed ok except one was slightly slow. Any help on what else it could be? or how to fix it with out the head coming off.