How much of a mileage increase with new injectors?

[srivett]

Hi all,
  I'm looking at getting some new/rebuilt injectors for my car.  It runs fine but I'd like to get better mileage.  I'm currently getting 6.26 litres per 100 km overall.  This includes lots of 30 km highway drives as well as very short pizza deliveries.  This works out to 846 km per 53 litre tank, the previous owner tells me he got 1200 when the car was new.  I am willing to spend a reasonable amount of money if I am able to recoup it in fuel savings.  Otherwise I'll spend my money on a new exhaust.

Note, 1150 km is 4.6 litres per hundred, the same as a new Golf TDI.  

Cheers, Steve

[Cheesetoast]

i'm getting about 700km to a 48l tank, new injector didn't make much of a diff, 50k maybe, 2 of mine were messed.  maybe in the summer i'll notice more.

[srivett]

I wonder if it's the injection pump then, that would be unfortunate.  I don't own the tools to R&R the pump plus it costs more to rebuild.

Steve

[chrissev]

Hi all,
  I'm looking at getting some new/rebuilt injectors for my car.  It runs fine but I'd like to get better mileage.  I'm currently getting 6.26 litres per 100 km overall.  This includes lots of 30 km highway drives as well as very short pizza deliveries.  This works out to 846 km per 53 litre tank, the previous owner tells me he got 1200 when the car was new.  I am willing to spend a reasonable amount of money if I am able to recoup it in fuel savings.  Otherwise I'll spend my money on a new exhaust.

Note, 1150 km is 4.6 litres per hundred, the same as a new Golf TDI.  

Cheers, Steve

I don't think you can get 1200km on an A2 diesel golf.  That would be around 75 miles to the gallon I think.  Maybe with a hybrid, I don't know.  My jetta is getting 650km to $30 of diesel right now but I think something is wrong with it.  I believe I need to rebuild the injection pump as the engine has been rebuilt, as have the fuel injectors.  I get the usual problem where the engine misses at idle and runs rough, but if you give it a bit of pressure on the accelerator or pull out the cold start, it runs better.  You have to look at the size of the fuel tank.  A new golf TDI gets around 45miles to the gallon, but has a bigger tank than an A2 golf, so it can go further.

[Hammy]

Steve;

 I have almost the identical vehicle, and I have had a best of around 950Kms, on 52L of fuel. I remember back then that I was driving on 80Km/h highways, driving at under 100Km/h, just trying to see how good of mileage I could get. When I'm on the 400Hwy, it drops to about the same as your mileage, and if you are doing over 120km/h it drops under 800Kms/tank.

 A friend of mine, used to claim that he could get nearly 1100kms/tank in his '93 Jetta, but I'm not sure that I believed that. Maybe there are just some freak situations out there also, I don't know.

  I think we might be in the same boat though, meaning all of my parts and spare parts have 350 K plus on them, so their probably due for rebuilding and such. I have been thinking about injectors as well. Keep us posted on the injectors, or if you figure out a way to decrease your consumption. Best of luck

[srivett]

The Bentley says "If mileage falls markedly below 4.4litres/100km check..."  Maybe I should just leave it alone for now and wait for summer.  The previous owner specifically said mileage has dropped 300 km per tank since buying it.  He was living in Oshawa and working in Toronto so he was running the car A LOT.  It was also his office as he was a parole officer.  Maybe I"ll be able to get better mileage when I inherit my brothers '89 transmission.    You don't want to know how bad of shape a VW can get and still cover 200 km a day without breaking down, hehe

Chris:  You definately have a problem.  It takes 10 - 20 seconds, max, for my car to run properly no matter how cold it is.  I've heard that poor transmission oil can stall out the engine so you need to hold in the clutch...is this your problem?

Steve

[RAMMSTEIN]

I sure can do more than anybody here, because the way I drive.

Sure my TDI is not the same as your cars, but still my best of 4.1 l/100km is good.

I know that Blades is able to do 5.3 l/100km with his 1.6D and that another member here, Wingaman is able to fit 60 litres in his Jetta when empty.

So if you do 60/5.3x100= 1132km.

Doable, in summer only though. :wink: