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[Webby the Bear]

hi guys hope you're all well. Ok so I've had a fuel consumption problem as I've posted about before. Had tech two done and only issue was lazy o2's and quite low maf reading (i can post those original results if you'd like as i finally found the thread lol) so i feel I've done everything possible that i should do to correct there lazy sensors. I've vacuum leak checked. I've replaced the MAF sensor. I've cleaned air filter. Replaced fuel filter. Put wyns fuel cleaner in. So. And I'm still getting same high consumption. So do you think its now time to replace the o2's? If so that would not be a bad time as i think I've wangled use of the two post ramps at school :-)

[cem_devecioglu]

lazy lambdas will increase consumption , as the car wont go correctly.. besides did you check Coolant temperature sensor..
and inlet air temperature sensor..

[Webby the Bear]

lazy lambdas will increase consumption , as the car wont go correctly.. besides did you check Coolant temperature sensor..
and inlet air temperature sensor..

Cem you must have read my mind!! I was just about to post about the CTS to say i'd actually forgotten that. i havent tested it. the best i can do is get a multimeter on it and do a resistance check. unless there's any other test i can do?

i know how to test the AIT sensor so ill check that too.

clearly wasnt as close to my diagnosis as i thought 

[cem_devecioglu]

lazy lambdas will increase consumption , as the car wont go correctly.. besides did you check Coolant temperature sensor..
and inlet air temperature sensor..

Cem you must have read my mind!! I was just about to post about the CTS to say i'd actually forgotten that. i havent tested it. the best i can do is get a multimeter on it and do a resistance check. unless there's any other test i can do?

i know how to test the AIT sensor so ill check that too.

clearly wasnt as close to my diagnosis as i thought 

normally a faulty coolant temperature sensor causes rich mixture for prolonged periods but you must stay behind the car
 
(darker exhaust smoke)
 
I also tried measuring it but passing through plastic shields I was not so sucessful (voltage as I was not sure of the cables).. readings were unreliable..
 
tech 2 shows better results for both..

[Webby the Bear]

having said that i think the CTS results were good from my last techII and i still had the high consumption. ill post up when i get in tonight

thanks cem 

[Webby the Bear]

ps, any idea what reading i should get at the MAF on a multimeter? i'm at school and i have a multimeter here so can quickly check it on my break 

[cem_devecioglu]

having said that i think the CTS results were good from my last techII and i still had the high consumption. ill post up when i get in tonight

thanks cem 

be sure there is not even a pin hole on exhaust system (before lambdas)..  it effects radically.

[cem_devecioglu]

ps, any idea what reading i should get at the MAF on a multimeter? i'm at school and i have a multimeter here so can quickly check it on my break 

 I remember  I have seen the maf voltage somewhere else in OOF   but maf wont effect that much..
 
but a new maf will increase your consumption I bet.. (mine did)

[cem_devecioglu]

and one more , block your egr /if there exists)

[Webby the Bear]

having said that i think the CTS results were good from my last techII and i still had the high consumption. ill post up when i get in tonight

thanks cem 

be sure there is not even a pin hole on exhaust system (before lambdas)..  it effects radically.

so between exh. manifold and o2 sensor? how can i check for a pin hole if its so small? 

[cem_devecioglu]

having said that i think the CTS results were good from my last techII and i still had the high consumption. ill post up when i get in tonight

thanks cem 

be sure there is not even a pin hole on exhaust system (before lambdas)..  it effects radically.

so between exh. manifold and o2 sensor? how can i check for a pin hole if its so small? 

you need to be under the car when its working.. otherwise you cant find.. (and if someone pushes accelerator it will be more audible and easy to detect)

[Webby the Bear]

having said that i think the CTS results were good from my last techII and i still had the high consumption. ill post up when i get in tonight

thanks cem 

be sure there is not even a pin hole on exhaust system (before lambdas)..  it effects radically.

so between exh. manifold and o2 sensor? how can i check for a pin hole if its so small? 

you need to be under the car when its working.. otherwise you cant find..

shouldnt be a problem mate. i can get it on the ramps here 

if its a pin hole will i see smoke coming out of it?

[cem_devecioglu]

having said that i think the CTS results were good from my last techII and i still had the high consumption. ill post up when i get in tonight

thanks cem 

be sure there is not even a pin hole on exhaust system (before lambdas)..  it effects radically.

so between exh. manifold and o2 sensor? how can i check for a pin hole if its so small? 

you need to be under the car when its working.. otherwise you cant find..

shouldnt be a problem mate. i can get it on the ramps here 

if its a pin hole will i see smoke coming out of it?

yep.. if someone hammers it easier to find

[Lazydocker]

You'll also hear/feel it

[Webby the Bear]

having said that i think the CTS results were good from my last techII and i still had the high consumption. ill post up when i get in tonight

thanks cem 

be sure there is not even a pin hole on exhaust system (before lambdas)..  it effects radically.

so between exh. manifold and o2 sensor? how can i check for a pin hole if its so small? 

you need to be under the car when its working.. otherwise you cant find..

shouldnt be a problem mate. i can get it on the ramps here 

if its a pin hole will i see smoke coming out of it?

yep.. if someone hammers it easier to find

nice one mate.

i presume then also if there was a leak at the exh. manifold between it and the block (gasket) i'll see that too?
i dont think theres a manifold leak... never seen any smoke or anything in engine bay but hey, its another thing to check aint it