ok random question

i recently changed my exhaust with decat and it didnt have bits for the lambda so i just left them off,,,,, car ran fine ( well as it used to)

now i have just changed gearbox,,,, i had to disconect the battery for it and now when i start the car it runs for a few seconds,,,,,, the just dies and if i tickle the throttle it cuts out quicker

wondering if i need to reconect up the lamdas or not or could it be another issue i have ???

take into account that it did run before with the lambda sensors in the boot but i never disconnected the battery when i changed the exhaust hence me asking

 

the world will end...................boom

 

btw this is for a subaru impreza

 

...in that case u'll get a blow job and ur car will be fine.....pmsl

 

i would say you have another problem, but you need to get your lambda refitted too!

 

lambda sensor wont fit and the diagnostic one is stuck in the old cat

 

without the lambda your fuelling will always be incorrect and you risk running lean enough to melt the pistons or rich enough to cause bore wash, take the exhaust to someone like longlife or powerflow they should be able to weld a lambda boss into your exhaust so that you can refit it, having it disconnected will not cause your car to not run, i would say you have disturbed something whilst removing the gearbox or battery check all your connections are on plus make sure you have fitted your earth lead back on the box if it had one fitted

 

im gonna check all that, im just thinking of ideas at the min to save me back tracking

i just tried to start it tonight in the dark, im gonna add fuel, change the fuel filter and plugs and give it another go, just wanting ideas where to look if that makes sense

 

Wrong

Edit: Just realised I left this on a cliff hanger! Just take your downpipe, decat section w/e to a local exhaust place and they should be able to weld in a new bung for you. You can run your car without an o2 sensor (afterall this is what happens when it is being mapped). But for decent fuel economy (helpfull when driving to Germany you could do with it). I can't see why it would stop the car from starting though as you would be running open loop on cold-starts.

 

[quote=SiZT;4901858]Wrong

no i aint mate while i have not a massive amount of experience with subaru's i have seen lamda failures cause melted pistons (and cats for that matter) on things like corsa's clio's and other badly made cars

 

botters,a narrowband lambda sensor is only used for cruise and idle conditions, it is completely ignored on load, so a faild lambda will not affect fueling under load (ie piston melting) conditions, just make the car run like a bag of shit

 

cool, the closed loop dont work on it as its got a "mines" chipped ecu, i dont even get a check engine light on,,,,,,, that includes when i had a hole the size of a apple in the cat !!!!

now lets think of other things,,,,, oh and jim time table and nearest station to bromley as its been a while pmsl

 

shouldnt you be asking on scoobynet or something ginge???
pmsl
pmsl
pmsl

 

Hi there should be a green multiplug on the bulkhead make sure thats pluged in as its for the engine manegment iirc

 

Thats right, and it only adjusts the fuelling by a really small amount (IIRC around 5%) so can in no way cause starting or melting piston issues.

 

ok i checked everything, turns out i forgot to connect the maf sensor hose up to the inlet on the turbo,,,,, so the maf wasnt reading vacum i guess

connected back up and POOF its working again

cheers for your help guys :cheers:

and RC4, i did post on scooby net,,, i do it all the time but this site seems to answer and give me correct answers aswell with my clutch issue

it looks like i will be going to the ring,,,, downside it means i wont be borrowing vans and cars from work,,,, so back to 60 quid a week fuel bill

guess it wont be fixed for a few more days

 

thats a pretty big hose to forgot to put on

 

as said,if i remember correctly its about 2000rpm where it stops using the lambda

 

I thought it was 4500rpm

lambda works for idle, part throtle and switches off at 4500 or full throtle.

Thats what I got told anyway!

 

Have checked my info and its about the 3200rpm mark.

Although, as said will be needed for good idle mixture to keep smoothness and more than likely for the MOT emissions test,as this is done at idle.

 

it wasnt taken off it had pulled off when we jacked up the engine to tilt it and get the gearbox at a angle to get it on, never touched it hence i never checked it its only cause i was looking at plugs on sensors i noticed it

 

[QUOTE=botters;4901896]You are totally Wrong, with a capital W in fact, because the lambda sensor has fuck all to do with WOT operation.

But it must be a really cheap shit exhaust if it doesnt have a spot for teh lambda sensor to screw into.

Without the sensor, the car will just be very hard on fuel.