Still Got Poor Fuel Economy!!!!
Discussion
Help!
Last year I posted on here to try and find the cause of my poor fuel economy on my car. It’s a 2002 VW Golf Mk4 1.9 GT TDi (130bhp).
I’ve had the car for five years and have averaged 55mpg – and that’s not driving like an old man. If I drove really briskly I’d struggle to get it below 45mpg.
It went in last summer for a new Cambelt and came out on the same day running poorly at around 47mpg. The garage who fitted the cambelt had no idea what it could be other than the turbo intercooler pipes which were leaking allegedly and I replaced them on their advice - No improvement. Since then its had the timing checked (by another garage - bang on the money), had the tracking done, had a full service, tyre pressures are fine and its still averaging 47mpg ish. The brakes aren’t binding either. Also, I replaced the engine undertray as the original was hanging down and possibly creating a bit of drag.
Any ideas what could be causing this?
By the way, its got 200k miles on the clock but it can’t be down to the age / mileage of the car because the economy changed on the same day.
I also put a can of BG244 fuel treatment in the fuel tank every 10k miles and its run superbly until the cambelt change.
Need to find the cause as it’s costing me loads more money!
Cheers in advance,
MHM
Last year I posted on here to try and find the cause of my poor fuel economy on my car. It’s a 2002 VW Golf Mk4 1.9 GT TDi (130bhp).
I’ve had the car for five years and have averaged 55mpg – and that’s not driving like an old man. If I drove really briskly I’d struggle to get it below 45mpg.
It went in last summer for a new Cambelt and came out on the same day running poorly at around 47mpg. The garage who fitted the cambelt had no idea what it could be other than the turbo intercooler pipes which were leaking allegedly and I replaced them on their advice - No improvement. Since then its had the timing checked (by another garage - bang on the money), had the tracking done, had a full service, tyre pressures are fine and its still averaging 47mpg ish. The brakes aren’t binding either. Also, I replaced the engine undertray as the original was hanging down and possibly creating a bit of drag.
Any ideas what could be causing this?
By the way, its got 200k miles on the clock but it can’t be down to the age / mileage of the car because the economy changed on the same day.
I also put a can of BG244 fuel treatment in the fuel tank every 10k miles and its run superbly until the cambelt change.
Need to find the cause as it’s costing me loads more money!
Cheers in advance,
MHM
motorheadman said:
Help!
Last year I posted on here to try and find the cause of my poor fuel economy on my car. It’s a 2002 VW Golf Mk4 1.9 GT TDi (130bhp).
I’ve had the car for five years and have averaged 55mpg – and that’s not driving like an old man. If I drove really briskly I’d struggle to get it below 45mpg.
It went in last summer for a new Cambelt and came out on the same day running poorly at around 47mpg. The garage who fitted the cambelt had no idea what it could be other than the turbo intercooler pipes which were leaking allegedly and I replaced them on their advice - No improvement. Since then its had the timing checked (by another garage - bang on the money), had the tracking done, had a full service, tyre pressures are fine and its still averaging 47mpg ish. The brakes aren’t binding either. Also, I replaced the engine undertray as the original was hanging down and possibly creating a bit of drag.
Any ideas what could be causing this?
By the way, its got 200k miles on the clock but it can’t be down to the age / mileage of the car because the economy changed on the same day.
I also put a can of BG244 fuel treatment in the fuel tank every 10k miles and its run superbly until the cambelt change.
Need to find the cause as it’s costing me loads more money!
Cheers in advance,
MHM
Don't take this the wrong way but at 200K miles and 12 years old it's possibly time to bale out and get something a little newer as it sounds like you're throwing money away unnecessarily persevering with this car? Sorry if this isn't the answer you're looking for.Last year I posted on here to try and find the cause of my poor fuel economy on my car. It’s a 2002 VW Golf Mk4 1.9 GT TDi (130bhp).
I’ve had the car for five years and have averaged 55mpg – and that’s not driving like an old man. If I drove really briskly I’d struggle to get it below 45mpg.
It went in last summer for a new Cambelt and came out on the same day running poorly at around 47mpg. The garage who fitted the cambelt had no idea what it could be other than the turbo intercooler pipes which were leaking allegedly and I replaced them on their advice - No improvement. Since then its had the timing checked (by another garage - bang on the money), had the tracking done, had a full service, tyre pressures are fine and its still averaging 47mpg ish. The brakes aren’t binding either. Also, I replaced the engine undertray as the original was hanging down and possibly creating a bit of drag.
Any ideas what could be causing this?
By the way, its got 200k miles on the clock but it can’t be down to the age / mileage of the car because the economy changed on the same day.
I also put a can of BG244 fuel treatment in the fuel tank every 10k miles and its run superbly until the cambelt change.
Need to find the cause as it’s costing me loads more money!
Cheers in advance,
MHM
Andy OH said:
Don't take this the wrong way but at 200K miles and 12 years old it's possibly time to bale out and get something a little newer as it sounds like you're throwing money away unnecessarily persevering with this car? Sorry if this isn't the answer you're looking for.
What for? I'm not throwing money at it so why get rid of it?In the morning it was running fine - in the afternoon it wasn't.
Nah, there's plenty of life in the car yet. These things will do hundreds of thousands of miles. It's cheap as chips to run (normally) and extremely reliable which is why I'm hanging on to it. I just need to find out what is causing the sudden increase in fuel economy.
Undo the 3 13mm cam pulley bolts a turn or so, advance the cam, turn the inner larger (16 or 18mm I think) nut anti clockwise an ablosule fraction, like maybe 2mm. Then retighten the 3 13mm's
Fill the tank reset the trip ect and run to get figures, if its worse, turn it the other way, if its slightly better turn it a further 1 or 2mm.
Repeat til optimum MPG / engine runnig found.
Fill the tank reset the trip ect and run to get figures, if its worse, turn it the other way, if its slightly better turn it a further 1 or 2mm.
Repeat til optimum MPG / engine runnig found.
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