All Things Mk5 > How to Guides / Troubleshooting
Fuel cut
bacillus:
I don't know how clean petrol from your stations are but if you haven't changed your petrol filter yet in trying to sort this low pressure problem, I suggest you do so asap.
Sugen:
--- Quote from: bacillus on August 25, 2009, 02:02:36 pm ---I don't know how clean petrol from your stations are but if you haven't changed your petrol filter yet in trying to sort this low pressure problem, I suggest you do so asap.
--- End quote ---
Fuel filter has been replaced when cam was replaced about 5 days ago. Did some more logging yesterday and it seems there is nothing wrong with the low pressure pump in the tank pressures don't drop below 4.8 bar at some instances the rest of the time its above 5 bar. Load on pump somtimes reaches 90% but generally between 60-80%.
Did quite a bit of testing yesterday and this is what I've noticed. When loading it in say 4th gear I get the slight hesitation almost all time thereafter it seems as though the vehicle goes into a soft limp mode of sorts where it now request less boost etc not the normal Revo settings. The only way to revert back is to turn vehicle off and then start it again.
Rail pressures are still dropping intermittently by as much as 40bar so it seems I will have to fit an upgraded pump what concerns me however is that according to Carl at Revo they have not experienced such issues on the Stage 2 map.
So do I install the upgraded pump and risk having issues when i decide to go Stage 2 + ? What else can I test ? I have now changed my REvo settings to B6 T3 F9 will try and do some testing today.
Janner_Sy:
I had the same sort of issue with my car in january, it turned out to be the fuel sender that had gone tits up, and was sending incorrect readings resulting in the car going in limp mode. Butontop of that, where i had my car serviced they had also rammed the engine cover back on breaking the fuel regulator bit ontop of the hpfp. both were replaced, problem solved :happy2:
Sugen:
--- Quote from: simonskerton on August 27, 2009, 06:46:58 am ---I had the same sort of issue with my car in january, it turned out to be the fuel sender that had gone tits up, and was sending incorrect readings resulting in the car going in limp mode. Butontop of that, where i had my car serviced they had also rammed the engine cover back on breaking the fuel regulator bit ontop of the hpfp. both were replaced, problem solved :happy2:
--- End quote ---
Part number of fuel sender perhaps ?
Janner_Sy:
sorry mate not a clue. I had i done at a dealership
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