ValverInBits
I just thought i'd better post up and let you all know about my finidings when changing lambda sensors.
On my valver:
Changed the lambda sensor (which was utterly fubared) for a nice new NGK one (£54ish iirc). The NGK seems a better part than bosch BTW, comes better packaged with plastic gaurd and copperslip applied.
Results: Tickover - faultlessly smooth, MPG WAY up (although not measured, still easily noticed), Noticably quicker too.
On my Ph2 172 (2002):
Changed the upstream (before cat) lambda when doing my 182 manifold and decat conversion. Went for a Bosch lambda as the NGK was about £98 and this bosch part set me back £56.61+vat from central auto supplies. Seemed really easy to remove the old one on a car of this age.
Results: Can't make any comments on power gains as this will be mostly down to the 182 manifold and decat. MPG - This is where it get's interesting - Holding the car at 80 (kmph) on a flat stretch of motorway, I reset the MPG reader. The first figure that came up was 47.5mpg! I repeated the same 30 mile journey i had done with my old lambda at the same sort of pace (pretty quick
) and MPG for the 30 miles is now 33.5 up from 28.3! Which is an improvement of 5.2 MPG. At £1.10 per litre the lambda has paid for itself in 2217 miles
From these experiences, I'd advise anyone who is experiencing unusually poor MPG to change their lambda for a good quality, brand new replacement.
shoot me down if im an idiot, but the evidence here seems convicing enough for me.
On my valver:
Changed the lambda sensor (which was utterly fubared) for a nice new NGK one (£54ish iirc). The NGK seems a better part than bosch BTW, comes better packaged with plastic gaurd and copperslip applied.
Results: Tickover - faultlessly smooth, MPG WAY up (although not measured, still easily noticed), Noticably quicker too.
On my Ph2 172 (2002):
Changed the upstream (before cat) lambda when doing my 182 manifold and decat conversion. Went for a Bosch lambda as the NGK was about £98 and this bosch part set me back £56.61+vat from central auto supplies. Seemed really easy to remove the old one on a car of this age.
Results: Can't make any comments on power gains as this will be mostly down to the 182 manifold and decat. MPG - This is where it get's interesting - Holding the car at 80 (kmph) on a flat stretch of motorway, I reset the MPG reader. The first figure that came up was 47.5mpg! I repeated the same 30 mile journey i had done with my old lambda at the same sort of pace (pretty quick
From these experiences, I'd advise anyone who is experiencing unusually poor MPG to change their lambda for a good quality, brand new replacement.
shoot me down if im an idiot, but the evidence here seems convicing enough for me.