BX 19 Fuel consumption problem

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Rgod
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BX 19 Fuel consumption problem

Post by Rgod »

Hello..
I have a BX 19 1989 engine type b6D(1.6L 115 HP) LE JETRONIC ,224000 KM passed ,
the problem is the fuel consmption is 1 L for 7 K"M ,i think its to much,
and the car feels very weak to,i need suggestions for solving the two problem,thanks.
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MULLEY
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Post by MULLEY »

Welcome, this really is a club for members worldwide :D

In order to try & diagnose the issue(s) you have, can you provide some more detail about your experiences in the past & what you've noticed over time.

Fuel consumption can also vary according to altitude, the types of roads you drive on, the distances you do day to day & of course your driving style.
2002 C5 2.0 HDI Estate - Jasmine - Now SORN
2011 Mini Cooper D Clubman - SOLD
2016 Mercedes A180D Sport - Auto refinement
1992 TZD Turbo - Bluebell - My daily
1991 Gti 16V - Blaze - crash damaged, will get repaired.
1990 Gti 8Valve SOLD - looks like it's been scrapped
2002 Mini Cooper S - SOLD - i miss this car
1992 TXD - Scrapped in March 2014
1988 CX 25 GTI Turbo2 - SORN
1996 - AX Memphis 1.5D - Dream - SORN

I'm not just a username, i'm also called Matthew.
kiwi
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Post by kiwi »

Lots of variables to affect Fuel Consumption add to the list

Brakes Binding

Faulty Exhaust System ie a blocakge from broken Baffle restricting Gas flow.

Inacurate Speedometer/odometer

The way you monitor the fuel consumption ie do you brim fill and record the distance covered between brims or just until the light comes on or you run out?

Add that to driving style and conditions driven in and its hard to say.

Grade of Fuel used etc etc etc so we need more details to help I am afraid.

Rough guide for you I do open road driving most speeds 100kph between an altitude of 200-1200m on twisty roads with my two manual gearboxed BX19 Carb versions running on 95 octane and one car returns 10 kms per litre the other 9km on average. The reason for the veriation I can put down to a odometer/speedometer error (after checking via a GPS) and most likely a loose baffle in the exhaust system. Which owning two BXs made me question the lower figure.

More info we may be able to help.
1991 BX19 TZS 04/01/91 (Deceased)
1990 BX19 TRS 27/10/89 (Reborn)
1992 BX19 TXD (Ex UK - K 744 SDF) 15/06/92
1990 BX19 TZS Auto 06/11/1989
1992 BX TZD Turbo Estate (Ex UK) 1/07/91
Rgod
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Post by Rgod »

I leave in a city with many moantains,i cheked the fuel consumption by filling fuel passing some distance and then refiling the tank again.

i have another Q :does this cars have a catalytic converter?and could it be the problem ?
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Post by kiwi »

It could be the Cat but as far as I was aware the 1989 BX was not fitted with them from the factory but it could have been fitted after to comply with your countrys emission rules.

I think though you have answered part of your problem with City and Mountain driving. City driving is uneconomical just add a few steep hills and mountains to the mix and you can expect to use 25% more fuel.
1991 BX19 TZS 04/01/91 (Deceased)
1990 BX19 TRS 27/10/89 (Reborn)
1992 BX19 TXD (Ex UK - K 744 SDF) 15/06/92
1990 BX19 TZS Auto 06/11/1989
1992 BX TZD Turbo Estate (Ex UK) 1/07/91
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Jaba
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Post by Jaba »

We work in miles here and 7km per litre is equal to 20 mpg or 4.3 miles per litre.
Clearly there is something wrong. You say it feels weak, does this mean down on power ? Of all the possibilities I would do a compresson check first of all.

Your car could have a cat, but only you can tell us that by looking for it and the lambda sensor in the exhaust down pipe before the first silencer (muffler?)
The Joy of BX with just one Citroën BX to my name now. Will I sing Bye Bye to my GTI or will it be Till death us do part.
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Post by kiwi »

Jaba wrote:We work in miles here
One of the few places in the world that still does 8)

I should have given some clearer figures to play with. My 19TRS gets an average of 10.22 km per litre the lowest being 9.3 and I travel on a plateau that rises from 200 to 1100 metres in the space of 50km. The 19TZS I have does 9.1 km per litre the lowest being 7.2km per litre. Currently (since march) the last 6 fills have averaged 8.5-8.9 and I suspect the cause as the Baffle being loose in one of the rear Silencer/mufflers.

How many fill ups have you measured the fuel consumption over?
1991 BX19 TZS 04/01/91 (Deceased)
1990 BX19 TRS 27/10/89 (Reborn)
1992 BX19 TXD (Ex UK - K 744 SDF) 15/06/92
1990 BX19 TZS Auto 06/11/1989
1992 BX TZD Turbo Estate (Ex UK) 1/07/91
Rgod
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Post by Rgod »

I try to measure every time the fuel consumption,i just cheked to see if i have a catatalist convertor,and i assume that i do,its placed in the middle of the car a bit closer to the engine,connected to the Headers(Exhaust Manifold)after that it has a same kind of a big muffler and at the and another one,i assume my catalist convertor causes back pressure that reduces the engine power :cry:
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2002 C5 2.0 HDI (110) Estate - Jasmine - SORN
2011 Mini Cooper D Clubman - SOLD
2016 Mercedes A180D Sport - Auto refinement
1992 TZD Turbo - Bluebell - SORN
1992 TZD Turbo Estate - SORN
1991 Gti 16V - Blaze - crash damaged, will get repaired - SORN
1990 Gti 8Valve SOLD - looks like it's been scrapped
2002 Mini Cooper S - SOLD - i miss this car
1992 TXD - Scrapped in March 2014
1988 CX 25 GTI Turbo2 - SORN
1996 - AX Memphis 1.5D - Dream - SORN
x 8

Post by MULLEY »

This is one of those difficult one's to diagnose, perhaps if you tried driving very economically & then report back with your findings that might give us a bit more of a clue as to what other areas in addition to all of the ones mentioned above might be causing this.

If you are still using virtually the same amount of fuel after deliberately trying to be economical, then there must be a fault somewhere.

Is your car a manual or auto?

From the 115bhp that you quote, its approx 10bhp down on my 1.9 gti, you may very well have a cat fitted, but to be honest it shouldnt feel that low down on power as these engines are quite torquey in the midrange.
2002 C5 2.0 HDI Estate - Jasmine - Now SORN
2011 Mini Cooper D Clubman - SOLD
2016 Mercedes A180D Sport - Auto refinement
1992 TZD Turbo - Bluebell - My daily
1991 Gti 16V - Blaze - crash damaged, will get repaired.
1990 Gti 8Valve SOLD - looks like it's been scrapped
2002 Mini Cooper S - SOLD - i miss this car
1992 TXD - Scrapped in March 2014
1988 CX 25 GTI Turbo2 - SORN
1996 - AX Memphis 1.5D - Dream - SORN

I'm not just a username, i'm also called Matthew.
Rgod
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Posts: 38
Joined: Sun Jul 19, 2009 5:14 pm
Location: Isreal

Post by Rgod »

ok,but my driving style is very calm,the RPM doesnt goes to 4000, max 3200,above 4000 the engine does lots of noise end i dodnt feel any more power above that,never tried really going above 4500 RPM,much noies,like its at the end of its power.
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2011 Mini Cooper D Clubman - SOLD
2016 Mercedes A180D Sport - Auto refinement
1992 TZD Turbo - Bluebell - SORN
1992 TZD Turbo Estate - SORN
1991 Gti 16V - Blaze - crash damaged, will get repaired - SORN
1990 Gti 8Valve SOLD - looks like it's been scrapped
2002 Mini Cooper S - SOLD - i miss this car
1992 TXD - Scrapped in March 2014
1988 CX 25 GTI Turbo2 - SORN
1996 - AX Memphis 1.5D - Dream - SORN
x 8

Post by MULLEY »

Oh dear, that sounds like a problem, perhaps others with more knowledge may be able to advise?

These engines should rev quite easily upto the rev limiter/redline, & whilst they do get more vocal, they shouldnt sound like theres a problem & the power should still be increasing.
2002 C5 2.0 HDI Estate - Jasmine - Now SORN
2011 Mini Cooper D Clubman - SOLD
2016 Mercedes A180D Sport - Auto refinement
1992 TZD Turbo - Bluebell - My daily
1991 Gti 16V - Blaze - crash damaged, will get repaired.
1990 Gti 8Valve SOLD - looks like it's been scrapped
2002 Mini Cooper S - SOLD - i miss this car
1992 TXD - Scrapped in March 2014
1988 CX 25 GTI Turbo2 - SORN
1996 - AX Memphis 1.5D - Dream - SORN

I'm not just a username, i'm also called Matthew.
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DLM
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Post by DLM »

The engine code quoted at the start doesn't make sense for a 1.9.

The B6D was a 1.6 unit (like other engines with codes starting B) and indeed you quote "B6D 1.6L"!

Engine codes starting with a D are 1.9 units. If you've quoted the engine code directly from the label on the block of your engine this could be the reason why the engine feels "weak". In Israel, does the registration document for the car state the original engine capacity?

Of course this doesn't explain the high fuel consumption, but thought I'd mention it.
Back on two wheels and pedal power for the moment.
Rgod
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Joined: Sun Jul 19, 2009 5:14 pm
Location: Isreal

Post by Rgod »

In Israel its called a BX19(but its a 1.6 L-115 HP ,LEjetronic).
The car does lots of noise above 4 RPM,and when i press the gas the accelaration is very slow,suggestions?

thanks
Rgod
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Posts: 38
Joined: Sun Jul 19, 2009 5:14 pm
Location: Isreal

Post by Rgod »

Could i get some suggestions what to do\fix in the car ?
kiwi
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Post by kiwi »

Se earlier post

kiwi wrote:Lots of variables to affect Fuel Consumption add to the list

Brakes Binding

Faulty Exhaust System ie a blocakge from broken Baffle restricting Gas flow.

Inacurate Speedometer/odometer

The way you monitor the fuel consumption ie do you brim fill and record the distance covered between brims or just until the light comes on or you run out?

Add that to driving style and conditions driven in and its hard to say.

Grade of Fuel used etc etc etc so we need more details to help I am afraid.

Rough guide for you I do open road driving most speeds 100kph between an altitude of 200-1200m on twisty roads with my two manual gearboxed BX19 Carb versions running on 95 octane and one car returns 10 kms per litre the other 9km on average. The reason for the veriation I can put down to a odometer/speedometer error (after checking via a GPS) and most likely a loose baffle in the exhaust system. Which owning two BXs made me question the lower figure.

More info we may be able to help.

Also check your Engine compression, Tyre pressures and probably consider the timing and mixture set.
1991 BX19 TZS 04/01/91 (Deceased)
1990 BX19 TRS 27/10/89 (Reborn)
1992 BX19 TXD (Ex UK - K 744 SDF) 15/06/92
1990 BX19 TZS Auto 06/11/1989
1992 BX TZD Turbo Estate (Ex UK) 1/07/91
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