Advice on emission testing

[bonecrusher]

Hello guys,
Just looking for some advice on emission testing.I have this toyota rav4 2.0i petrol 3sfe engine type 1996my.It has no oxygen sensors instead it has an adjustable potentiometer to set fuel mixture.there is no live data on this just flash codes. cant remember what the CO reading was(+-10%) But I will check it on the analyser tomorrow and let you guys Know.The CO reading changes max .2% when I set it to maximum lean on pot.

I just cant set the CO reading. Here is a list of items I have checked

1.Checked potentiometer working(when I turn the screw there is a voltage output voltage increase,decreases
2.Checked coolant temp sensor resistance decreases with increased engine temp
3.Set T.P.S according to autodata.
4.Changed oil

I am still not getting any joy.I cant remember what the CO reading was(+-10%) But I will check it on the analyser tomorrow and let you guys Know.

Anybody here doing MOT testing?Does anybody have any good info on fuel mixture settings?

Any advice will help

[Liteace]

you sure there is no oxygen sensor, is it not under the big metal manifold protector that says do not touch hot. have you checked inlet air temp sensor.

[Meat-Head]

Anybody here doing MOT testing?Does anybody have any good info on fuel mixture settings?
Any advice will help

Never thought you was in Ingland.

Can only agree with Liteace about the Lambarda probe - seems a little silly - fuel errection, a cat (post 1992) - then no Lambarda probe!

Some toyota's the Carina E - they don't have a lambarda probe but a
'air/fuel probe' or something - word - direct from toyota dealer is they are ?400+VAT - can't use a lambarda probe.

Air filter blocked, spit vac pipe on map/airflow sensor.

Or even bad earth to ecu causing it to go scranny?

Could even be excess fuell pressure - word on street says Furry Jester - you can wind down fuel pressure for emmsions.

[bonecrusher]

I am 100% sure there is no oxygen sensor.I have not checked the air temp sensor.There is no live data values on this system just flash codes.I will try and get a resistance chart value for the sensor and report back tomorrow

The air filter is brand new

spit vac pipe on map/airflow sensor been checked good condition

Brand new OE fuel pressure regulator installed

[Meat-Head]

Brand new OE fuel pressure regulator installed

1) Are you in Ingland?

2) Go to Poundland.com and download some mole grips, slightly clamp the fuel supply into rail - then ~~~~ it off

[bonecrusher]

I am in outlandlol

[jakejiang]

I am in outlandlol
outland is good:embarassed:

[Liteace]

I am 100% sure there is no oxygen sensor.I have not checked the air temp sensor.There is no live data values on this system just flash codes.I will try and get a resistance chart value for the sensor and report back tomorrow

The air filter is brand new

spit vac pipe on map/airflow sensor been checked good condition

Brand new OE fuel pressure regulator installed

Is it sorted, if so what was the problem ?

[bonecrusher]

My apologies for not updating this thread.

I hate to say this but Meat-head was right.vac pipe problem.:giveup:I had never checked it myself as the cust said it was checked at the stealers and I naturally assumed it was good.They(stealers) replaced the fuel pressure regulator aswell(not me)
.
The CO level immediately dropped to .5% after i sorted it out But this is where it gets interesting when I rev it to 2500rpm and hold the CO level climbs to 2% and stays there.I held it at this throttle opening for approximately 2 mins.I know normally the CO levels climb up a little and then should return to its original CO settings at idle or lower.

I want to know why this does not happen in this case.Please explain this to me as I have had this problem before on other cars and could never put my finger on it.

[Liteace]

Cause when reving less vac in the vac pipes unless engine is under load


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[Meat-Head]

I want to know why this does not happen in this case.Please explain this to me as I have had this problem before on other cars and could never put my finger on it.


Cause when reving less vac in the vac pipes unless engine is under load




OFF TOPIC:-

That's cool Satsmo - with reference to this thread http://www.digital-kaos.co.uk/forums/f4/bin-man-need-job-urgently-birmingham-area-236188/index4.html#post1320919 - guess you were refering to post 57?

Sussed this without seeing the car - let alone worked out if it's in Ingland or not.

Due to the fact there was a damaged part involed - told you we specalise in vechile damage - and bad spelling

ON TOPIC:-

Ah cool - you updated the thread that is good.

Agree with Liteace about what he said - Think about this for reference

STUPID Emerican V8 Corvette - you pull away from a 'Turn pike' or a 'stop sign' - you boot it, the throttle butterfly opens - it sucks in lots of air - but the 'air cleaner' is right in the front 'fender' area - so you get a massive depression - vacum - vortex - whatever - so to overcome this the Emericans installed a 'vacum cleaner' motor to 'inflate' the 'intake'manifold for a couple of seconds untill the pressure recovered.

Jap cars have a 'silencer' pipe in the inlet pipe - for noise reasons.

Meat

[bonecrusher]

My cust had the entire exhaust changed and brought the vehicle back to me to check it out again.The CO % is .5% at idle when revved to 2500rpm it climbs to .8% and stays there.

In autodata in the tunings and emission section it states

CO level at idle speed-tailpipe .5% max
Increased idle speed for CO test 2400-2600rpm
CO content at increased idle speed .3%

Please correct me if I am wrong so does that mean I must have .8% at high idle speed(Co level at idle + Co content at increased idle speed)??

[Liteace]

My cust had the entire exhaust changed and brought the vehicle back to me to check it out again.The CO % is .5% at idle when revved to 2500rpm it climbs to .8% and stays there.

In autodata in the tunings and emission section it states

CO level at idle speed-tailpipe .5% max
Increased idle speed for CO test 2400-2600rpm
CO content at increased idle speed .3%

Please correct me if I am wrong so does that mean I must have .8% at high idle speed(Co level at idle + Co content at increased idle speed)??



No, you cant add them together, its:

0.5 at idle
0.3 at increase idle

Give the air idle valve \ throttle body a good clean out with carb cleaner

[Larue]

Oil change in engine might help as well. If it's been running at high emissions for a while then engine oil should be polluted.

[Meat-Head]

engine oil should be polluted.

an i say have caught you out with bad Inglish?

Oil should be clean NOT polluted :giveup::roflmao::roflmao:

[Larue]

an i say have caught you out with bad Inglish?

Oil should be clean NOT polluted :giveup::roflmao::roflmao:
:congrats::aetsch:
Congratulations!
But if the engine has been running for a while on high emissions then engine oil should be polluted right now.
So it is worth to put in NOT polluted engine oil!

[Meat-Head]

:congrats::aetsch:
Congratulations!
But if the engine has been running for a while on high emissions then engine oil should be polluted right now.
So it is worth to put in NOT polluted engine oil!


CORRRECT - can't say what car it is - as there is allegley somewhere between 4 and 6 left of these cars - now has more petrol in sump than tank - all thanks to M-H-M. lol