running rich problem

[jukie]

right im new to this forum and need some major help

ive got a 2004 seat leon cupra 180bhp model and the engine managment light has come on so took it to a garage and they said it was running way to rich so they replaced my lambda sensor then it was fine but as i went to collect it i started it up and the engine light came on again so they are now replacing the part with a genuine seat one rather than bosch this has happened three times could there be anything else that is causing it to run rich ? as im running out of money any help would be much apreciated

 

[SalSheikh]

have they vag-commed it to find the fault code?

 

[Three Leons]

I know exactly how you feel having had the same issue with my old LC (EML light on, diagnostics said it was running rich each time).

Thought it could have been various things - a split breather hose under the engine cover, dodgy coolant temperature sender and knackered thermostat. Changed each of these in turn and following the thermostat replacement never had the problem again. Next (and most expensive!) stop would have been the lambda sensor.

Not sure if the same solution will work for you but the stat is less than a tenner, CTS and breather hose were about £30 each

 

[Pyro]

get them to reset the fault code on vag-com befor they start it back up when you satrt it up and the light comes back on does it stiull run rich? or is it just a light on? where abouts do you live maybe theres some one near with vag-com that can check fault codes for ya if you let me knoiw were you live ill try to find you nearest vag specilest

 

[Pyro]

have they vag-commed it to find the fault code?

beat me to it

 

[jukie]

did a diagnostic test thingy not with a laptop tho, only way i can describe it is its a very big brick with a tiny screen ? they did this three times and whenever i started it up to drive off it came back with the same fault code which ive left on the bill sheet so dont know it sorry but im goin back tomox hopefully when theyve fitted the seat part but if it still comes up ill get my money back cos so far ive spent 280 quid on two lamba sensors that did jack i think ill mention the things that PAS suggested see what they say, but im thinking would a vw/ seat main dealer be more helpfull ? as atm im using a specialist ?

 

[jukie]

oo forgot i dunno if it still ran rich i lost my temper by that point and drove home (ina old ass mk2 loon not a big comfy leon) as they were retesting it !!

 

[Trublu07]

Mine has had this problem
For the last month. Have replaced the cts. I think I have a leak in a hose under the inlet manifold. U clear the code and turn the light off and it comes
Back after 50 miles.

 

[jukie]

my came back three times on start up its very very annoying

 

[Trublu07]

It's also killed my fuel filter and backbox isn't holding up well either.

 

[Pyro]

id stic with vag specilest mate dealers are stupid money

 

[jukie]

god im used to old skool vw where i can fix everything with ducktape and string not used to all this costing me money stuff so specialists it is

 

[Pyro]

thats what i did with my festa was mark two 1988 same age as me lol was my second fave car just coz it was retro

 

[jukie]

retro rocks lol the loon is 1987 so year older than me but i love it.... more than the leon dare i say :O but the leon has its own appeal comfort speed handling etc

 

[jukie]

To pyro, im in tavistock near plymouth in devon so if you do know anyone with vag-com near here would be much apreciated cos im getting my refund and the car back monday if they havnt got any further with it

 

[Pyro]

To pyro, im in tavistock near plymouth in devon so if you do know anyone with vag-com near here would be much apreciated cos im getting my refund and the car back monday if they havnt got any further with it

How far out of Exeter are you mate coz now a few places there but will av a look when I'm home if I ever get out if traffic :'(

 

[jukie]

im bout 45, 50 mile away but theyd have to come to me unfortunalty cos the cupra is not insured or taxed although ive been looking on ebay and have seen vagcom for about a tenner ?? is that right if so i may buy it and then ill just need help with the using it bit lol

 

[sambryant]

Junkie what dump valve are you running, if your running a atmospheric dumpvalve it will cause the car to run rich

 

[jukie]

ATM it's got a forge splitr and it is on atmospheric atm

Ok here goes the question how does it cause it to run rich ?? If u put the blanking plate on will it help ?

 

[sambryant]

That's your problem then m8. I had the same problem. Basically what happens, your car losses air and because the car fuels for the amount of air that is measured by the maf, when the air is lost, there becomes too much fuel resulting in running rich. So the answer is, fit the blanking plate and run 100% recirculating, job done, can't believe the garage you went to didn't know that.