Golf Mk4 throwing a tantrum after filling up

[GreenV8S]

If it clears after a restart it can't be the fuel itself which is the problem. Perhaps it's aeration in the fuel or contamination in the tank which is getting into the fuel lines. Have you tried just driving though it? If it goes away on its own, that supports the theory. All the restart would do is turn the pump off for a few moments and restart the ECU. If it's going through the ECU startup that cures the problem, there's something else going on. That would typically leave fault codes. Have you checked for those?

[CorradoTDI]

nuyorican said:

Thanks.

No fault codes. Well, one related to the secondary air pump thing which I can’t imagine is related.

I haven’t tried driving through it as it was quite alarming at the time being in heavy city traffic. Well, I mean I still drove it for a while just to get somewhere safe to pull over.

I'd replace the pump before looking at anything else, maybe not let it get so low too in future if running into the red... these cars are 20+ years old now!

[CorradoTDI]

said:

Yeah, potentialy...

Under the boot carpet there is a round access point for the fuel pump - removing this gives access to the tank.

Worth a look with a torch next time the fuel is a bit low I guess

[Saleen836]

CorradoTDI said:

I'd replace the pump before looking at anything else, maybe not let it get so low too in future if running into the red... these cars are 20+ years old now!

Never understood why people think letting a car run low of fuel is a bad thing, the pick up pipe is at the bottom of the tank so full or in the red the fuel is always picked up from the same place, plastic fuel tanks have been in use since the early 70's so the risk of debris in the tank is minimal I would imagine

[CorradoTDI]

Saleen836 said:

CorradoTDI said:

I'd replace the pump before looking at anything else, maybe not let it get so low too in future if running into the red... these cars are 20+ years old now!

Never understood why people think letting a car run low of fuel is a bad thing, the pick up pipe is at the bottom of the tank so full or in the red the fuel is always picked up from the same place, plastic fuel tanks have been in use since the early 70's so the risk of debris in the tank is minimal I would imagine

You real should avoid running past the reserve regularly - most modern cars have an in-tank pump and these are cooled by the fuel itself.

Water (condensation) is the main issue with diesel tanks.

Edited by CorradoTDI on Saturday 7th October 21:19

[gazza285]

Fuel tank breather blocked?