Lambda Probe (oxygen Sensor)

[andy07]

My Gal has been lacking performance for sometime now, have changed coil pack, Cat, plugs n leads and Maf, also cleaned out EGR valve and blocked it off, changed fuel and air filters only last year. Changed the MAF 3 times because of fault codes

1st MAF cheapy from ebay, still showing faults, sent back got full refund.

2nd MAF Bosch from motor factors, still showing faults, (after checking out the wiring with thanks to Mirez), got it exchanged no questions asked.

Finally at last the 3rd was ok with no faults, but didnt make any difference to performance or lack of it, instead (3 months down the line) I was getting fault codes for the OXYGEN SENSOR (something that Cyborg mentioned in a previous post of mine a couple of months back).

 

Anyway after reading several posts about the OXYGEN SENSOR I thought I'd try disconnecting it, and yeh what a difference that made, much smoother and quite abit more poke but less MPG (connected 28ish mpg, disconnected 25ish mpg) by now I thought I was getting somewhere with the lack of power for the past 8 months, it just had to be the OXYGEN/LAMBDA sensor.

New Bosch sensor from the motor factors £66, put it in (reset the ECU) and went for a spin and MPG went up to about 29 but the lack of power was back. :lol:

 

I'm so fed-up now I'm thinking of disconnecting it again just to get the power back and leaving it that way, is that ok to do so?

 

Oh yeh something else I nearly forgot to mention aswell was of more recent the tickover is jumping up and down abit but with the OXYGEN/LAMBDA sensor disconnected the tickover was quite stable. Its done 107k miles by the way.

 

I'v always been able to sort everything out myself up until now thanks to this wonderful forum and you guys of course so I dont wanna give up now and have to pay a garage to sort it out.

many thank for reading

Edited October 5, 2010 by andy07

[Mirez]

Andy, I think due to the limited number of V6's out in Galaxy guise its probably worth asking this over at http://www.vr6oc.com - good luck!

[andy07]

Andy, I think due to the limited number of V6's out in Galaxy guise its probably worth asking this over at http://www.vr6oc.com - good luck!

 

 

Thanks for that Mirez very interesting when it comes to the V6 engine. Now a member of that aswell.

 

Also forgot to mention I'v got a misfire but only at about 1000-1100rpm anything after that it sounds quite smooth

[cyborg]

Andy, I think due to the limited number of V6's out in Galaxy guise its probably worth asking this over at http://www.vr6oc.com - good luck!

 

 

Thanks for that Mirez very interesting when it comes to the V6 engine. Now a member of that aswell.

 

Also forgot to mention I'v got a misfire but only at about 1000-1100rpm anything after that it sounds quite smooth

sounds like a blocked fuel injector unlikley but possible the injector has low flow setting below 3000 rpm high flow over so.

However I bought cheep ht leads and the ohm's reading's were way off which gave me poor power so i replaced with 10 mm race and iridiam plugs and never looked back

http://kevinshipp.t35.com/galaxy/S8000090.JPG