I have a similar problem on my H4 which has never been resolved... Garage fitted new Cat/Lambda sensor, check showed no fault codes on the ECU but emmisions were still slightly over... in the end they passed it out of sympathy I think. Subsequent MOT's have been sympathetic in passing it as well although I have tried a replacement Air flow meter to no avail. The engine has a slight hunt on tickover which has never been resolved. It has been off the road for a couple of years whilst we are renovating the house we are in and the plan when I get it back on the road is to install a Megajolt ECU as a prelude to doing some engine upgrades which will either pinpoint the issue or at least be able to lean the mixure out for the MOT! Cheers Allan
On Apr 20, 11:30 am, bilje55 <billjackso...@btinternet.com> wrote: > I took my H4 to my local garage for the annual MOT following a new cam > belt, plugs, filters and oil. It shouldn't have failed..but it > did.....on emissions. And this is where modern mechanics enters (for > me) the realms of voodoo or witchcraft. It's a fuel injected 16v zetec > with about 40k on the clock only...with new oil and filters and a > satisfactory exhaust...but it fails on emissions? Two new sensors are > fitted...something to the block..temperature? and a Lambda sensor? The > situation improves but not enough...so a new catalytic converter is > acquired...and fitted...but the situation has still not improved > enough....so my garage man wants to call in a specialist auto > electrician, as he believes that there is some kind of electrical > fault...either wiring or (Please no) within the ECU. He (my garage > man) freely offers that he is really out of his depth...so I've agreed > to the specialist guy having a look...but he ( a travelling man who > undertakes specialist work for various small garage businesses in my > area) probably can't do the business until next Tuesday..and that's > just for diagnosis! > Friends...I need information: what is likely to be the problem here? > Should I be preparing for further expenditure on replacement parts? > Where should I start? > with thanks in anticipation.... > Bill -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to quantumowners@googlegroups.com To unsubscribe from this group, send email to quantumowners-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s).
