Another fuel problem

All the information you need on engine-problems is here. The engine includes the Turbo-charger, airco and everything else you'll find under the bonnet.

Moderators: jifflemon, coyote1980, Rachel

User avatar
dave
Advanced 480 rookie
Posts: 560
Joined: Mon Aug 08, 2005 9:31 pm
Location: Edinburgh!
Contact:

Another fuel problem

Post by dave » Mon Apr 02, 2007 8:41 pm

Ok got the clivo insured , taxed and MOT'd.

Ran it for a few days now and it eats the fuel!!

10er will do maybe 40-50 miles. Is that right?

Im also not running a lambda sensor, if i put one on will the fuel economy be better?? As with no lambda it will running rich yes?

Happy and sad at the same time :(
Make: Renault : Model:Clio t : Year: 1993 : Colour: Blue Met.. : Engine: 1721cc

Scooby Dooby Dont ;)

catgroom
480 Is my middle name
Posts: 3418
Joined: Sun Dec 21, 2003 9:20 pm
Location: Market Deeping
Contact:

.

Post by catgroom » Wed Apr 04, 2007 6:33 pm

Hi Dave!

Not sure about Lambda but I think yes..

With the fuel consumption,I find that with MAF set to 650,I get 100 miles per tenner.

Hope yer good mate!

Steve
I'm No Longer Here :(

http://www.volvo-480-europe.org/forum/viewtopic.php?f=19&t=34359&start=20

User avatar
dave
Advanced 480 rookie
Posts: 560
Joined: Mon Aug 08, 2005 9:31 pm
Location: Edinburgh!
Contact:

Post by dave » Wed Apr 04, 2007 7:44 pm

Hmm maybe mines is set too high then??

What is it best to be set at?? 650?
Make: Renault : Model:Clio t : Year: 1993 : Colour: Blue Met.. : Engine: 1721cc

Scooby Dooby Dont ;)

User avatar
dave
Advanced 480 rookie
Posts: 560
Joined: Mon Aug 08, 2005 9:31 pm
Location: Edinburgh!
Contact:

Post by dave » Wed Apr 04, 2007 7:50 pm

I might fit my lambda as well just to help (even a little)
Make: Renault : Model:Clio t : Year: 1993 : Colour: Blue Met.. : Engine: 1721cc

Scooby Dooby Dont ;)

catgroom
480 Is my middle name
Posts: 3418
Joined: Sun Dec 21, 2003 9:20 pm
Location: Market Deeping
Contact:

.

Post by catgroom » Wed Apr 04, 2007 8:19 pm

Hi Dave

I was told 550.

650 absolute max.

What you been runnign it at then??!00 and over can easily fuck it!

:?
I'm No Longer Here :(

http://www.volvo-480-europe.org/forum/viewtopic.php?f=19&t=34359&start=20

User avatar
dave
Advanced 480 rookie
Posts: 560
Joined: Mon Aug 08, 2005 9:31 pm
Location: Edinburgh!
Contact:

Post by dave » Wed Apr 04, 2007 8:51 pm

How do you measeure it again??

What setting on the multi meter?
Make: Renault : Model:Clio t : Year: 1993 : Colour: Blue Met.. : Engine: 1721cc

Scooby Dooby Dont ;)

User avatar
owen080808
Advanced 480 rookie
Posts: 590
Joined: Sat Nov 05, 2005 2:24 pm
Location: Glasgow/Perthshire
Contact:

Post by owen080808 » Wed Apr 04, 2007 9:07 pm

you want your multimeter set to measure resistance (ohms) and measure between pins 1 and 6, altho i've never actually dont it, so if they're not actually numbered on the car then maybe someone else would be kind enough to label up a pic?
Currently car-less

| '92 turbo + Rich mod | Sold

| '90 turbo + Seized engine | gone to the volvo dealer in the sky

[img]http://i32.photobucket.com/albums/d4/owen080808/480%20turbo/avatar.jpg[/img]

User avatar
dave
Advanced 480 rookie
Posts: 560
Joined: Mon Aug 08, 2005 9:31 pm
Location: Edinburgh!
Contact:

Post by dave » Wed Apr 04, 2007 9:13 pm

Ok sorted, i have reduced it from 650 to 500. So ill see what the fuel is like over the next few days.

19Mpg is just really bad!
Make: Renault : Model:Clio t : Year: 1993 : Colour: Blue Met.. : Engine: 1721cc

Scooby Dooby Dont ;)

User avatar
dave
Advanced 480 rookie
Posts: 560
Joined: Mon Aug 08, 2005 9:31 pm
Location: Edinburgh!
Contact:

Post by dave » Mon Apr 09, 2007 11:19 am

Seems a bit better now.

If i fit my lambda, would it better still? What is the reason its there? WIll it improve driveability?
Make: Renault : Model:Clio t : Year: 1993 : Colour: Blue Met.. : Engine: 1721cc

Scooby Dooby Dont ;)

User avatar
98kellrs
480 Expert
Posts: 675
Joined: Wed Aug 04, 2004 10:02 pm
Location: Isle of Man
Contact:

Post by 98kellrs » Mon Apr 09, 2007 10:44 pm

As far as I know the Lamba measures your emmissions to check that you're not running too lean/rich, but I don't know (nor does anyone i've spoken to) what happens when it's removed..

..However like you, I'm about to find out as i've just de-catted mine, and removed the lambda sensor, fingers crossed! Only difference i've noticed is that the idle vibrations you feel through the car are much stronger than before, but that may just be because it's a free flow exhaust now :?

I just put £20 in today, so i'll measure how many miles I can clock up on it for you over the next few days
Ryan.

1992 480 ES, 110k, Paris blue, custom SS side-exit exhaust, De-catted, custom fibreglass lightweight bonnet, custom fibreglass front spoiler, stripped interior, Slate Black textured metal paint throughout, Cobra Imola S drivers Seat, Ricco 4 point 3 inch harness, Magnecor KV85 leads.

Current Status: A very impressive track car. :-D

User avatar
martinholmesuk
Friend of Club 480 Europe
Posts: 10049
Joined: Thu Sep 05, 2002 9:43 pm
Location: West Sussex

Post by martinholmesuk » Tue Apr 10, 2007 4:59 pm

Dave, You have what's called a B18FT(M) which is a b18ft without the sensor, the ecu goes into closed loop.
Volvo 940 Turbo 19T (real Volvo :P)
Audi TT

User avatar
dave
Advanced 480 rookie
Posts: 560
Joined: Mon Aug 08, 2005 9:31 pm
Location: Edinburgh!
Contact:

Post by dave » Tue Apr 10, 2007 7:43 pm

martinholmesuk wrote:Dave, You have what's called a B18FT(M) which is a b18ft without the sensor, the ecu goes into closed loop.
Is that good or bad??

Its not running right and gets a missfire/hesitation at higher rpms

:(
Make: Renault : Model:Clio t : Year: 1993 : Colour: Blue Met.. : Engine: 1721cc

Scooby Dooby Dont ;)

User avatar
martinholmesuk
Friend of Club 480 Europe
Posts: 10049
Joined: Thu Sep 05, 2002 9:43 pm
Location: West Sussex

Post by martinholmesuk » Tue Apr 10, 2007 9:59 pm

Short term fuel correction uses the oxygen senor to make small changes to the injector duty cycle. Effectivley it's the closed loop control of the mixture done during 'cruse' conditions. This is an offset made to the injector duty (that is calculated from the MAF signal), and acts to get the lambda value as near to 1 as possible. It is calculated 'on the fly' constantly by the ecu.

Long term correction is triggered when the short term correction reaches a particular offset, and the offset value is in one direction. The ECU stores a value that is calculated to bring the lambda value to near 1 in place of the short term correction. Thevalue offsets the entire range of fueling (it's supposed to correct for wear in the injectors, and / or drift in the output of the MAF).
Well Dave, I think it's not a problem with having no sensor... Have you changed the coul and rotor/dizzy/leads or have we been down this path because someone else did I'm sure of that.
Volvo 940 Turbo 19T (real Volvo :P)
Audi TT

User avatar
dave
Advanced 480 rookie
Posts: 560
Joined: Mon Aug 08, 2005 9:31 pm
Location: Edinburgh!
Contact:

Post by dave » Wed Apr 11, 2007 5:47 pm

martinholmesuk wrote:
Short term fuel correction uses the oxygen senor to make small changes to the injector duty cycle. Effectivley it's the closed loop control of the mixture done during 'cruse' conditions. This is an offset made to the injector duty (that is calculated from the MAF signal), and acts to get the lambda value as near to 1 as possible. It is calculated 'on the fly' constantly by the ecu.

Long term correction is triggered when the short term correction reaches a particular offset, and the offset value is in one direction. The ECU stores a value that is calculated to bring the lambda value to near 1 in place of the short term correction. Thevalue offsets the entire range of fueling (it's supposed to correct for wear in the injectors, and / or drift in the output of the MAF).
Well Dave, I think it's not a problem with having no sensor... Have you changed the coul and rotor/dizzy/leads or have we been down this path because someone else did I'm sure of that.
It has had new plugs but leads etc are older and the cap and arm are a bit older aswell.

Ill give them a change and see how it is. Its normally in higher gers 3rd and upwards at higher rpms that you feel/hear it.
Make: Renault : Model:Clio t : Year: 1993 : Colour: Blue Met.. : Engine: 1721cc

Scooby Dooby Dont ;)

User avatar
martinholmesuk
Friend of Club 480 Europe
Posts: 10049
Joined: Thu Sep 05, 2002 9:43 pm
Location: West Sussex

Post by martinholmesuk » Wed Apr 11, 2007 7:15 pm

coil, u changed that?
Volvo 940 Turbo 19T (real Volvo :P)
Audi TT

User avatar
dave
Advanced 480 rookie
Posts: 560
Joined: Mon Aug 08, 2005 9:31 pm
Location: Edinburgh!
Contact:

Post by dave » Thu Apr 12, 2007 8:35 pm

martinholmesuk wrote:coil, u changed that?
not yet but worth a try :)
Make: Renault : Model:Clio t : Year: 1993 : Colour: Blue Met.. : Engine: 1721cc

Scooby Dooby Dont ;)

User avatar
dave
Advanced 480 rookie
Posts: 560
Joined: Mon Aug 08, 2005 9:31 pm
Location: Edinburgh!
Contact:

Post by dave » Thu Apr 12, 2007 8:40 pm

martinholmesuk wrote:coil, u changed that?
Im going to give it a full service and change the coil.

Fit lambda sensor and wiring.

Pressure test for any leaks.

Hopefully that might solve the problem
Make: Renault : Model:Clio t : Year: 1993 : Colour: Blue Met.. : Engine: 1721cc

Scooby Dooby Dont ;)

User avatar
martinholmesuk
Friend of Club 480 Europe
Posts: 10049
Joined: Thu Sep 05, 2002 9:43 pm
Location: West Sussex

Post by martinholmesuk » Fri Apr 13, 2007 8:39 pm

fixed?

User avatar
dave
Advanced 480 rookie
Posts: 560
Joined: Mon Aug 08, 2005 9:31 pm
Location: Edinburgh!
Contact:

Post by dave » Sun Apr 15, 2007 12:50 pm

martinholmesuk wrote:fixed?
Still a WIP.

Will update as soon as i have finished!
Make: Renault : Model:Clio t : Year: 1993 : Colour: Blue Met.. : Engine: 1721cc

Scooby Dooby Dont ;)

Rapid-R5
Knows where Volvo is from
Posts: 152
Joined: Fri Jan 12, 2007 9:33 pm

Post by Rapid-R5 » Wed Apr 18, 2007 7:22 pm

tut tut dave, all that time and money and you couldn't spring for a new dizzy cap and arm!!

steve
Renault 5, 1.7 volvo turbo engine, turbo technics turbo, lowered on koni, scorpion stainless exhaust, samco and stainless pipework, front mount intercooler, about 170 bhp.....more to come!

Post Reply