P38A Mileage Query
- Thread starter oakey
- Start date
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- 2,101
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- Mull of Kintyre
Mileage dropped before I changed plugs and didnt improve afterwards
I have got another week of shortish journeys then back to longer ones and will see what happens
Will check O2 sensors on nanocom too
I have got another week of shortish journeys then back to longer ones and will see what happens
Will check O2 sensors on nanocom too
- Posts
- 2,101
- Location
- Mull of Kintyre
How do I check MAF?
- Posts
- 2,101
- Location
- Mull of Kintyre
Does having an old fuel filter affect mileage?
- Posts
- 19,297
- Location
- Buckinghamshire, UK. ('95 DT)
Might restrict the amount of fuel getting through and push it up. It'd have to get pretty manky for that though.
I don't have the figures but it's a voltage reading taken at 1000 and 3000 rpm. Only problem with fuel filters is the car won't start if its very blocked!
The Lucas injectors at that mileage are usually dicey. I think the actual reading is arrived at by the injector pulsing( knowing fuel pressure and injector delivery amount) over the distance derived from the abs sensors( new wheels and tires?)
The Lucas injectors at that mileage are usually dicey. I think the actual reading is arrived at by the injector pulsing( knowing fuel pressure and injector delivery amount) over the distance derived from the abs sensors( new wheels and tires?)
- Posts
- 2,101
- Location
- Mull of Kintyre
No not new tryes etc
Fuel filter has done at least 120k cos I didnt know I had one
Not used injector cleaner stuff in petrol for ages
Fuel filter has done at least 120k cos I didnt know I had one
Not used injector cleaner stuff in petrol for ages
- Posts
- 2,101
- Location
- Mull of Kintyre
I will have a look and see which ones I have ta
- Posts
- 19,297
- Location
- Buckinghamshire, UK. ('95 DT)
What do you mean by "let by", Johnny?
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- 58,170
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- Preston Lancs.
If you have changed components reset the adaptive values to wipe the ECU memory or the ECU will be running the engine as it did with the worn components fitted.
By let by I mean the injector pulse no longer delivers a crisp waveform. They open slightly before and close slightly after. They also have a very poor spray when they get older. Even at 100000 miles there not great. There not available either. I attribute the Thor's better fuel consumption mostly to using Bosch gen 3 injectors. PS only gen 2 injectors will work with gems(see mark adams site for new and recon) I got mine off an American mustang breakers.
- Posts
- 2,101
- Location
- Mull of Kintyre
Just changed plugs n leads
Mileage plummeted before anything was changed
Mileage plummeted before anything was changed
BlackDogZulu
Active Member
- Posts
- 148
- Location
- Pembrokeshire
When I got mine (4.6 Thor) in April, the readout stayed around 11-12 mpg. One good long motorway blast and now the 'local' running about reading is 15-16 mpg. It must have adapted in some way (or there were some cobwebs in there). The mpg readout is not 100% accurate: compared with brim-to-brim readings over several hundred miles:
Local: brim-to-brim 16, readout 17.4
Motorway: brim-to-brim 20, readout 22.
Local: brim-to-brim 16, readout 17.4
Motorway: brim-to-brim 20, readout 22.
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- 2,101
- Location
- Mull of Kintyre
Hope to plug it in to Nanocom by weekend and have a looksee at figures.
Yes dashboard may be out a bit but just been using as comparison.
Will get a long run next week and see what happens
Yes dashboard may be out a bit but just been using as comparison.
Will get a long run next week and see what happens
injectorjoe
New Member
- Posts
- 1
- Location
- Grantham
My P38 is giving me 11mpg towing a 3.5ton horse trailer,
It is stuck in sports mode making it difficult to lockup in top.
I have had 20mpg solo when auto box was not playing up.
So check the box is in manual mode.
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- 2,101
- Location
- Mull of Kintyre
I will check ta
- Posts
- 2,101
- Location
- Mull of Kintyre
Gearbox seems to e working fine
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