I put in four rebuilt bosch injectors from (competitor's name removed by moderator) and since then my mileage went from 40 down to 30. any suggestions on how to tackle this? I did not test them before putting them in.
Thanks. Niko.
new injectors-worse mileage
Moderator: Fatmobile
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- Cetane Booster
- Posts: 74
- Joined: Sat Mar 15, 2008 11:11 pm
- Location: pittsburgh
new injectors-worse mileage
messed up 81 rabbit pickup...but its purple.
85 golf
80 gasser pickup
85 golf
80 gasser pickup
Re: new injectors-worse mileage
how long of a distance did you measure your economy?
91 jetta gl na german built
91 jetta gl ecodiesel
91 jetta gl ecodiesel
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- Cetane Booster
- Posts: 74
- Joined: Sat Mar 15, 2008 11:11 pm
- Location: pittsburgh
Re: new injectors-worse mileage
300 miles
messed up 81 rabbit pickup...but its purple.
85 golf
80 gasser pickup
85 golf
80 gasser pickup
Re: new injectors-worse mileage
Did the change coincide with your fuel station's change from summer to winter fuel?
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- Turbo Charger
- Posts: 2085
- Joined: Mon Apr 24, 2006 4:34 pm
- Location: Gloucester; Limey-Land
Re: new injectors-worse mileage
New injectors are likely set at the high end of the pressure range; or even above it, with a view that they will settle and reach the required[stated break pressure] in the future...
This will mean that the pump is likely retarded if it has been tuned to inject optimally for your 'old' injectors.
Try advancing pump.
This will mean that the pump is likely retarded if it has been tuned to inject optimally for your 'old' injectors.
Try advancing pump.
"I'm not here to help... I'm here to Pro-Volke"
Be like meeee...Drive a Quantum TD
...The best work-horse after the cart...
Quantae grow on you...but Rabbits are like roses...
... girls like em ;o)
Only one Darwin, Einstein, Poe and Verne.
That is why if you listen, you will learn:
From the one and only Quantum-man,
Who sees the worms from outside of the can.
7 Quantae in 20 years; 4 dead and 3 TD's still alive [2 wagons & 1 fastback] oh and a GTD )
Be like meeee...Drive a Quantum TD
...The best work-horse after the cart...
Quantae grow on you...but Rabbits are like roses...
... girls like em ;o)
Only one Darwin, Einstein, Poe and Verne.
That is why if you listen, you will learn:
From the one and only Quantum-man,
Who sees the worms from outside of the can.
7 Quantae in 20 years; 4 dead and 3 TD's still alive [2 wagons & 1 fastback] oh and a GTD )
Re: new injectors-worse mileage
sometimes I've found it takes several tanks of fuel to get a good average after doingca drastic change on my engine.
91 jetta gl na german built
91 jetta gl ecodiesel
91 jetta gl ecodiesel
-
- Cetane Booster
- Posts: 74
- Joined: Sat Mar 15, 2008 11:11 pm
- Location: pittsburgh
Re: new injectors-worse mileage
I adjusted my timing on the pump it was 77 and we bumped it up to 94. After a little test drive it did seem to have a little more pickup when climbing hills and ran a little quieter. we'll see if the mileage gets any better. Thanks for the help.
messed up 81 rabbit pickup...but its purple.
85 golf
80 gasser pickup
85 golf
80 gasser pickup
-
- Turbo Charger
- Posts: 2085
- Joined: Mon Apr 24, 2006 4:34 pm
- Location: Gloucester; Limey-Land
Re: new injectors-worse mileage
All else being 'normal' your initial was a wee bit low. Hopefully you will get your improvement. Future tweeks should be 0.05mm or so.
I have been running at 0.72mm, but I'm using injectors set to 125bar.
I have been running at 0.72mm, but I'm using injectors set to 125bar.
"I'm not here to help... I'm here to Pro-Volke"
Be like meeee...Drive a Quantum TD
...The best work-horse after the cart...
Quantae grow on you...but Rabbits are like roses...
... girls like em ;o)
Only one Darwin, Einstein, Poe and Verne.
That is why if you listen, you will learn:
From the one and only Quantum-man,
Who sees the worms from outside of the can.
7 Quantae in 20 years; 4 dead and 3 TD's still alive [2 wagons & 1 fastback] oh and a GTD )
Be like meeee...Drive a Quantum TD
...The best work-horse after the cart...
Quantae grow on you...but Rabbits are like roses...
... girls like em ;o)
Only one Darwin, Einstein, Poe and Verne.
That is why if you listen, you will learn:
From the one and only Quantum-man,
Who sees the worms from outside of the can.
7 Quantae in 20 years; 4 dead and 3 TD's still alive [2 wagons & 1 fastback] oh and a GTD )