After the comments from eightinavee I was worried so went straight of to see the garage that had switched off the sensors and bad info from me he had switched off the signal to the lpg ecu inorder for it to run on gas he also told me not to run it for long and that we needed to find the prob- so thanks again to eightinavee so far you have saved me bundles of dosh and worry- but I still have no signal from the sensors so amgoing to try another set of new ones and see if this fails what is my next stop? ECU failure? When i put a simulation test on the voltage is ok so no prob with wiring
Cheers
Sandy

Also how easy is it to damage the sensors - they were working fine -one new one not so new -until cats changed and then boom no more?

Hi sandy.

Can you tell me what the prob is as i missed out and my gas is pulling my petrol map out or is it in an earlier thread?

Cheers Nick.

I am on prins sequential gas and after changing engine everything fine changed the cats and wouldnt stay on gas so as an interim we shut of the lambda sensor to the gas ecu - i wrongly said we turned of the sensors which is what i had been told- I am about to replace both sensors - one was new as in less than a day old - at a cost of 160 quid i was trying everything in case it was a mapping prob but think i have to bight the bullet - just think it odd that they both went just like that but could have been the exhaust fitter I have a really good gas man down here he is in slough