Thanks for the replies. Theres a bit of info to digest and i dont think i can work on my car untill the weekend after this one.
FYI its a 96 940 b230fk m90. Speedo and cruise control work ok. Both my original and the swapped lambda were 130-140k likely original units. (My drawer only grows crusty old parts with about 130k miles on them already, but does come in handy). Volvo quoted me £150+ for new! Are generic ones normally ok? I will test mine, im assuming i can just probe the back of the plug in the bay. The ect sensor replaced was a new bosch unit, closest to the rear of the motor. I rebuilt the head in the summer so the inlet gaskets are all fresh, all the hoses and seals are new. Ive pinched off all vac lines from the mani and sprayed easystart over it all but rpm stays high.
Rob, i will strangle my engine and report back.
Last edited by sonofturd; Feb 19th, 2021 at 18:02.
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