Right guys got a slight problem with the 6. now to start off its got a new AEM wideband kit which it has been running well before the problem an ran fine.

the AFR gauge basically alerted me to this problem. every now and they she will max out on running rich at low revs or low load. goes 10:1 and a rev of the throttle will most of the time clear the issue. and when driving on low or medium load she can completely lean out an if I don't come off an on the throttle stutter and loose all power. off and on the throttle and she will be fine but it might happen again within 2-3min. and then never again.

now this problem happens when ever. it does it when its cold. when its warm an when its hot. sometimes it doesn't do it at all. its had all the gaskets replaced in the last 6 months. its had a new ECT sensor in the last 6 months. its now had a new MAP sensor which has made f**k all difference. spark plugs are 5-6k old and she's always ran on Tesco 99.

now on full throttle it doesn't rich or lean out it runs fine. now I gone through a few posts and iv measured ECT at hot an cold and it within range and iv also ruled this out because it couldn't cause the car to lean out it +19:1 (off the gauge)

the map sensor is brand new and have done 10miles on it, no change.

I have a new TPS and Air temp sensor but have not fitted these yet as I don't believe the air temp could cause such massive changes and I haven't changed the TPS due to trying to give the same throttle positions when it rich's or lean's and had no success and I drove 3 miles with it unplugged and made no difference.

please help its starting to get on my tits.

________________________________________

1997 ph1 bianca GTI6 - The looker
1996 ph1 Sigma GTI6 - Dead
1999 Red Rallye - The Daily
2005 Nissan Navara D40 - Family car
1968 Mustang Coupe - The dirty little secret
Put ya foot down, put ya foot down we'll loose em easy!

lambda is the AEM one wired in mate. its brand new and if that had failed the gauge would show that.

power steering sensor? don't think iv ever seen that one mate, do 6's have a power steering sensor? I don't think iv ever seen one. how would that cause it to lean and rich out so much?

________________________________________

1997 ph1 bianca GTI6 - The looker
1996 ph1 Sigma GTI6 - Dead
1999 Red Rallye - The Daily
2005 Nissan Navara D40 - Family car
1968 Mustang Coupe - The dirty little secret
Put ya foot down, put ya foot down we'll loose em easy!

Blue plug, won't hurt to unplug it and see.

________________________________________

Senior Test Automation Engineer for the 306GTi6 Owners Club Forum

---

anymore help?

________________________________________

1997 ph1 bianca GTI6 - The looker
1996 ph1 Sigma GTI6 - Dead
1999 Red Rallye - The Daily
2005 Nissan Navara D40 - Family car
1968 Mustang Coupe - The dirty little secret
Put ya foot down, put ya foot down we'll loose em easy!

It's on setting 3 since the get go. I'm going to change tps tomorrow as iv already got that.

________________________________________

1997 ph1 bianca GTI6 - The looker
1996 ph1 Sigma GTI6 - Dead
1999 Red Rallye - The Daily
2005 Nissan Navara D40 - Family car
1968 Mustang Coupe - The dirty little secret
Put ya foot down, put ya foot down we'll loose em easy!

A collapsing cat wouldn't cause its change between running rich an lean in an instant and it would also be Down on power. It's nothing to do with the lambda.

________________________________________

1997 ph1 bianca GTI6 - The looker
1996 ph1 Sigma GTI6 - Dead
1999 Red Rallye - The Daily
2005 Nissan Navara D40 - Family car
1968 Mustang Coupe - The dirty little secret
Put ya foot down, put ya foot down we'll loose em easy!

I really do think that you'll find that it's the lambda. not because the lambda is faulty, but because it isn't talking to the ECU properly. you'll find that you get the same isssues with the aem nit wired in.

________________________________________

Ex SC-6

Now in a Megane R26

Turned out to be a dual sensor problem. Changed the tps and that solved lean issues. Did a good few miles an changed the air temp sensor. No change to the rich issue. But it made the rich issue more easy to identify. The newish coolant sensor had gone faulty. Problem solved

________________________________________

1997 ph1 bianca GTI6 - The looker
1996 ph1 Sigma GTI6 - Dead
1999 Red Rallye - The Daily
2005 Nissan Navara D40 - Family car
1968 Mustang Coupe - The dirty little secret
Put ya foot down, put ya foot down we'll loose em easy!

To be fair, you would have found this fault if you had removed the sensor and immersed it in water of different temperatures and taken resistance readings in accordance with the values held on Autodata. Having said that though, you wouldn't really expect a new sensor to only last 6 months...

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone