Andy Bell
13-12-2023, 06:00 PM
Hi all
Yesterday my Golf suddenly went into limp mode when I was doing about 50mph and accelerating up to 60mph. The orange coil warning light started flashing. After restarting the engine, the light went out but soon came on again with the car losing power and going into limp mode the moment the engine was under any strain.
The AA came out and checked the fuel pressure sensor (tried a new one, made no difference), the fuel (was ok) and couldn't tie down the fault and so towed me home. The AA did get diagnostic messages on their computer, which made them check the fuel system.
Today, the problem is occurring frequently - as soon as the engine is under strain, such as going up any incline at 30mph, it happens. Revving the engine to 2500 rpm when stationary does not cause the problem.
A mechanic I often use came out today and confirmed that the fuel pressure regulator diagnostic error was on the computer - he took the car for a run with his computer connected and replicated the fault.
He checked all the injectors for issues and the fuel lines etc. He said the HPFP was ok and there was steady pressure from the in-tank pump. The fuel filter had been changed in September but I don't know if he checked it.
His suggestion is to replace the fuel pressure regulator, but he couldn't guarantee that would fix it. These things aren't cheap (approx £400 + VAT from VW) so I'm uncertain if this is the right move. The car is in otherwise good condition, having done 107,000 miles and has never had a serious issue before.
The mechanic is going to see if he can find a third party component that is good quality but cheaper.
My questions are:
Is this the most likely cause of the problem?
Is there anything else he should check before replacing the part to see if it helps?
Thanks everyone,
Andy
Yesterday my Golf suddenly went into limp mode when I was doing about 50mph and accelerating up to 60mph. The orange coil warning light started flashing. After restarting the engine, the light went out but soon came on again with the car losing power and going into limp mode the moment the engine was under any strain.
The AA came out and checked the fuel pressure sensor (tried a new one, made no difference), the fuel (was ok) and couldn't tie down the fault and so towed me home. The AA did get diagnostic messages on their computer, which made them check the fuel system.
Today, the problem is occurring frequently - as soon as the engine is under strain, such as going up any incline at 30mph, it happens. Revving the engine to 2500 rpm when stationary does not cause the problem.
A mechanic I often use came out today and confirmed that the fuel pressure regulator diagnostic error was on the computer - he took the car for a run with his computer connected and replicated the fault.
He checked all the injectors for issues and the fuel lines etc. He said the HPFP was ok and there was steady pressure from the in-tank pump. The fuel filter had been changed in September but I don't know if he checked it.
His suggestion is to replace the fuel pressure regulator, but he couldn't guarantee that would fix it. These things aren't cheap (approx £400 + VAT from VW) so I'm uncertain if this is the right move. The car is in otherwise good condition, having done 107,000 miles and has never had a serious issue before.
The mechanic is going to see if he can find a third party component that is good quality but cheaper.
My questions are:
Is this the most likely cause of the problem?
Is there anything else he should check before replacing the part to see if it helps?
Thanks everyone,
Andy