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[Martin_1962]

Got home and the emmisions light was on

I had some misfire codes - I ignore those - from a few days ago.

I had 0170 and 0173

Can anyone remember what they are for please?

[tunnie]

you should know where the codes are 

http://www.omegaowners.com/forum/YaBB.pl?num=1220619696

P0170 Fuel trim malfunction (Bank 1)
P0173 Fuel trim malfunction (Bank 2)

[Martin_1962]

you should know where the codes are 

http://www.omegaowners.com/forum/YaBB.pl?num=1220619696

P0170 Fuel trim malfunction (Bank 1)
P0173 Fuel trim malfunction (Bank 2)

Is this precat

[feeutfo]

no, maf. same part as 3.2 i believe, search for the bosch part number on the maf it self.

pre cat is 0420 0430. iirc

[Martin_1962]

no, maf. same part as 3.2 i believe, search for the bosch part number on the maf it self.

pre cat is 0420 0430. iirc

I fitted one last year

[feeutfo]

no, maf. same part as 3.2 i believe, search for the bosch part number on the maf it self.

pre cat is 0420 0430. iirc

I fitted one last year

pattern? or you may have an air leak in inlet or exhaust, its a fuel air inbalance thing.

[Martin_1962]

no, maf. same part as 3.2 i believe, search for the bosch part number on the maf it self.

pre cat is 0420 0430. iirc

I fitted one last year

pattern? or you may have an air leak in inlet or exhaust, its a fuel air inbalance thing.

Pattern

I'll check for inlet leaks - hoses off ect.

Or is it LPG related?

[feeutfo]

no, maf. same part as 3.2 i believe, search for the bosch part number on the maf it self.

pre cat is 0420 0430. iirc

I fitted one last year

pattern? or you may have an air leak in inlet or exhaust, its a fuel air inbalance thing.

Pattern

I'll check for inlet leaks - hoses off ect.

Or is it LPG related?

KEVIIIIIIIN....?

i'll bet on maf but see what others say.

[Martin_1962]

Seems to run OK though.

So what is the likelyhood of yet another MAF?

Anyone near me who can lend one for testing?

[Kevin Wood]

I would try it on petrol and see if it still occurs.

Basically, the ECU is having to adjust the fuelling too far to make the mixture correct. It's a problem on both banks, so that rules out Lambda sensors and exhaust leaks.

So - air leak into the intake system, a MAF problem or potentially LPG system in need of calibration / new filters / cleaning out of heavy ends IMHO.

Kevin

[Martin_1962]

I think the evaporator is on last legs

I wonder though if it is related to the cams and porting?

[feeutfo]

I would try it on petrol and see if it still occurs.

Basically, the ECU is having to adjust the fuelling too far to make the mixture correct. It's a problem on both banks, so that rules out Lambda sensors and exhaust leaks.

So - air leak into the intake system, a MAF problem or potentially LPG system in need of calibration / new filters / cleaning out of heavy ends IMHO.

Kevin

Heavy ends?

[Marks DTM Calib]

I think the evaporator is on last legs

I wonder though if it is related to the cams and porting?

Irrelevant as its a closed loop system.....

[Welung666]

I would try it on petrol and see if it still occurs.

Basically, the ECU is having to adjust the fuelling too far to make the mixture correct. It's a problem on both banks, so that rules out Lambda sensors and exhaust leaks.

So - air leak into the intake system, a MAF problem or potentially LPG system in need of calibration / new filters / cleaning out of heavy ends IMHO.

Kevin

Heavy ends?

Yes Chris, as opposed to the light ends

Heavy ends = Long chain hydrocarbons and moisture in the tank from long term storage at depots and filling stations, basically crud in the bottom of the tank

[Martin_1962]

I would try it on petrol and see if it still occurs.

Basically, the ECU is having to adjust the fuelling too far to make the mixture correct. It's a problem on both banks, so that rules out Lambda sensors and exhaust leaks.

So - air leak into the intake system, a MAF problem or potentially LPG system in need of calibration / new filters / cleaning out of heavy ends IMHO.

Kevin

Heavy ends?

Evaporator cleaned out last year - not too many in there.

No filter

Plastic injectors