Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Webby the Bear]

did you monitor the lambdas they may be lazy..

That's an excellent question Cem.

One thing I have noticed is that the car from a cold (even colder now we're in winter) start really has no performance at all. after it warms up its good.

could this be a performance problem relating to those lazy lambdas?

any tech 2 around you can give the answer in a minute..

Thanks Cem,

I did all the things that TB told me to do that could affect the laziness of my o2's. the only thing i havent done is ran the car without the maf plugged in.
if i do this will i perhaps see an increase in performance hence signalling my MAF was bad?

if i then do that and the car still runs bad from cold start i'm thinking the O2 sensors themselves should be replaced.

what do you think?

[cem_devecioglu]

did you monitor the lambdas they may be lazy..

That's an excellent question Cem.

One thing I have noticed is that the car from a cold (even colder now we're in winter) start really has no performance at all. after it warms up its good.

could this be a performance problem relating to those lazy lambdas?

any tech 2 around you can give the answer in a minute..

Thanks Cem,

I did all the things that TB told me to do that could affect the laziness of my o2's. the only thing i havent done is ran the car without the maf plugged in.
if i do this 1) will i perhaps see an increase in performance hence signalling my MAF was bad?

if i then do that and the car still runs bad from cold start 2) i'm thinking the O2 sensors themselves should be replaced.

what do you think?

1) the answer depends on the default map of ECU.. if the default map is prepared with a higher temperature (than your current temperature)  ecu will inject less fuel than required .. in reverse case ecu will inject more fuel resulting with rich mixture..but as the lambdas make secondary correction, performance wont be different imo.. unless the lambdas are donald..
 
2) when you monitor with tech 2 ,you will see lambdas shifiting between 0-1.0 volts .. if slow they require changing.. however
http://www.lambdapower.co.uk/diagnosis/diagnostic_index.asp#q1 recommends 70K or 7-10 years as official lambda change interval ..this means you have to change them anyway

[TheBoy]

did you monitor the lambdas they may be lazy..

That's an excellent question Cem.

One thing I have noticed is that the car from a cold (even colder now we're in winter) start really has no performance at all. after it warms up its good.

could this be a performance problem relating to those lazy lambdas?

When cold, its open loop, so no.

*Unless the trims are well out*

[cem_devecioglu]

did you monitor the lambdas they may be lazy..

That's an excellent question Cem.

One thing I have noticed is that the car from a cold (even colder now we're in winter) start really has no performance at all. after it warms up its good.

could this be a performance problem relating to those lazy lambdas?

When cold, its open loop, so no.

*Unless the trims are well out*

I assumed not cold.. hot..

[TheBoy]

did you monitor the lambdas they may be lazy..

That's an excellent question Cem.

One thing I have noticed is that the car from a cold (even colder now we're in winter) start really has no performance at all. after it warms up its good.

could this be a performance problem relating to those lazy lambdas?

When cold, its open loop, so no.

*Unless the trims are well out*

I assumed not cold.. hot..

Me no understumble    ??

[cem_devecioglu]

did you monitor the lambdas they may be lazy..

That's an excellent question Cem.

One thing I have noticed is that the car from a cold (even colder now we're in winter) start really has no performance at all. after it warms up its good.

could this be a performance problem relating to those lazy lambdas?

When cold, its open loop, so no.

*Unless the trims are well out*

I assumed not cold.. hot..

Me no understumble    ??

me too    I thought (assumed ) you commented on my post .. and I explained the assumption but you commented on Webbie
 
too much programming makes me like this

[TheBoy]

too much programming makes me like this

You should try adding 453 LUNs to a handful of servers. I've gone number blind now

[cem_devecioglu]

too much programming makes me like this

You should try adding 453 LUNs to a handful of servers. I've gone number blind now

everyday I ask myself a question..  can I retire before someone drop me in cemetery

[Webby the Bear]

Evening chaps,

I'm gonna be honest I can't remember if the trims were well off when we TechII'ed it.

I found this page which gives a list of the sensors that are used in the power train...

http://www.freeasestudyguides.com/fuel-trim-adaptive-learning.html

The sensors are these:



Ok, firstly everything is easy to check or replace but...
1.) Does the omega have a TPS? Am i being stoopid? lol
2.) ignition module... is that the disspac?
3.) Is the AIT on the omega the MAF?

[cem_devecioglu]

Evening chaps,

I'm gonna be honest I can't remember if the trims were well off when we TechII'ed it.

I found this page which gives a list of the sensors that are used in the power train...

http://www.freeasestudyguides.com/fuel-trim-adaptive-learning.html

The sensors are these:



Ok, firstly everything is easy to check or replace but...
1.) Does the omega have a TPS? Am i being stoopid? lol
2.) ignition module... is that the disspac?
3.) Is the AIT on the omega the MAF?

1.yes ..it has.. I changed mine .. result was a smoother throttle response..
2.yes.. dispac.. but on new models its not a single unit.. coil per plug instead..
3.yes.. as far as I know.. but never changed it as it showed nearly correct temperatures during tech 2 session..

[cem_devecioglu]

Webby, if you have an EGR block it.. but dont disconnect.
 
coolant temperature sensor is also critical (v-valley under plenum) if it shows incorrect low values , ecu will always inject more fuel causing rich mixture .. but you can understand this from the spark deposits and exhaust..

[Webby the Bear]

Webby, if you have an EGR block it.. but dont disconnect.
 
coolant temperature sensor is also critical (v-valley under plenum) if it shows incorrect low values , ecu will always inject more fuel causing rich mixture .. but you can understand this from the spark deposits and exhaust..

thanks cem. how do i block the EGR? And will that improve fuel economy and performance? 

[cem_devecioglu]

Webby, if you have an EGR block it.. but dont disconnect.
 
coolant temperature sensor is also critical (v-valley under plenum) if it shows incorrect low values , ecu will always inject more fuel causing rich mixture .. but you can understand this from the spark deposits and exhaust..

thanks cem. how do i block the EGR? And will that improve fuel economy and performance? 

very slight decrease in consumption and slight increase in performance.. mostly in hot weather..
 
however, it -may- disturb your idle when cylinder temperatures go high..
 
a tiny sheet of metal (usually cut from coke cans) under EGR will block exhaust recirculation into manifold

[TheBoy]

Ok, firstly everything is easy to check or replace but...
1.) Does the omega have a TPS? Am i being stoopid? lol
2.) ignition module... is that the disspac?
3.) Is the AIT on the omega the MAF?

Assuming 2.5 v6
1) Yes, its the electrical connector on the throttle body
2) Yes
3) AIT = Air Intake Temp? If so, yes, just above the MAF, on the right angled bit of duct from air filter.

[TheBoy]

Webby, if you have an EGR block it.. but dont disconnect.
 
coolant temperature sensor is also critical (v-valley under plenum) if it shows incorrect low values , ecu will always inject more fuel causing rich mixture .. but you can understand this from the spark deposits and exhaust..

thanks cem. how do i block the EGR? And will that improve fuel economy and performance? 

ON the V6, the EGR is to reduce NOX. Blocking will have a mariginal affect on cruising MPG, but makes it a bit more sprightly/responsive.

If the EGR is unable to fully close (it will be full of soot and shite), this will make the car run far from optimally, hence the recommendation to block it if the EGR is suspect.