Sazzy Posted December 9, 2020 Report Share Posted December 9, 2020 (edited) 3 hours ago, ½cwt said: @Sazzy can you post the data off the emissions report? Some more expert members might be able to interpret to give you a better idea. A good Italian tune up (deliberately push the revs and hold higher revs with a good throttle opening) to get all the sensors and cat surfaces hot prior to an MOT can often help if it is only a marginal pass/fail. Otherwise could be MAF sensor (Bosch £150 new, or second hand for about £30 on eBay, only 2 screws but you need a hollow tip Torx bit to get them out) if not may be the other O2 sensor? Don't assume cats are shot at this stage. @Clivescoobydo the 986 is not a lead burner or you will have shot cats.... Hi ok so .... Lambda 1.04 HC 5 CO 0.08 C02 14.9 02 0.91 I won't pretend to understand all this. 😒 Edited December 9, 2020 by Sazzy Quote Link to comment Share on other sites More sharing options...
½cwt Posted December 9, 2020 Report Share Posted December 9, 2020 I hope others can take a look. Did the tester say they'd tried to get you a pass or did they just hand you a fail? Quote Link to comment Share on other sites More sharing options...
edc Posted December 10, 2020 Report Share Posted December 10, 2020 Load up a photo of the emissions test sheet. Quote Link to comment Share on other sites More sharing options...
Sazzy Posted December 10, 2020 Report Share Posted December 10, 2020 7 hours ago, ½cwt said: I hope others can take a look. Did the tester say they'd tried to get you a pass or did they just hand you a fail? Just handed me the fail cert Quote Link to comment Share on other sites More sharing options...
Sazzy Posted December 10, 2020 Report Share Posted December 10, 2020 6 hours ago, edc said: Load up a photo of the emissions test sheet. Quote Link to comment Share on other sites More sharing options...
Clivescoobydo Posted December 10, 2020 Report Share Posted December 10, 2020 7 hours ago, Sazzy said: Looks to me like it only just failed on the lambda where the limit is 1.03 for both 2.7 and 3.2. Be interesting to compare with last years result. Replace the sensor first Quote Link to comment Share on other sites More sharing options...
Sanky Posted December 10, 2020 Report Share Posted December 10, 2020 (edited) 8 hours ago, Sazzy said: Think you need to give it the so called Italian tune up, before the test. Mine has been marginal on the emissions for the last 2 years, but the tester usually gets it through by revving the nuts off it. I have read on another post about getting the car hot and holding the car at around 5000rpm for a mile or to get some real heat through the CATS for them to start working. I will be trying this next year before the MOT test. Edited December 10, 2020 by Sanky 1 Quote Link to comment Share on other sites More sharing options...
Sazzy Posted December 10, 2020 Report Share Posted December 10, 2020 6 hours ago, Clivescoobydo said: Looks to me like it only just failed on the lambda where the limit is 1.03 for both 2.7 and 3.2. Be interesting to compare with last years result. Replace the sensor first Last year it went through on 1.03 but it had failed first time on the 2nd fast idle, I only know this though because it's on my car app. I never actually got a fail cert (which I think they are supposed to give to you also) so they must've done something to get it through. I had a reoccurring CEL at the time on bank 2. Replacing the pre cat 02 sensor sorted that and the light has never come on since. If the other one needed replacing would it throw the light again? Quote Link to comment Share on other sites More sharing options...
Sazzy Posted December 10, 2020 Report Share Posted December 10, 2020 (edited) Someone has recommended Cataclean to me but you need to put it in on 1/4 of a tank and the car is over 3/4 full. Typical. I can't exactly drive it around for the next few days to empty it out grr. Edited December 10, 2020 by Sazzy Quote Link to comment Share on other sites More sharing options...
Clivescoobydo Posted December 11, 2020 Report Share Posted December 11, 2020 19 hours ago, Sazzy said: Last year it went through on 1.03 but it had failed first time on the 2nd fast idle, I only know this though because it's on my car app. I never actually got a fail cert (which I think they are supposed to give to you also) so they must've done something to get it through. I had a reoccurring CEL at the time on bank 2. Replacing the pre cat 02 sensor sorted that and the light has never come on since. If the other one needed replacing would it throw the light again? My guess is it would. I would tend to replace both if one failed as a matter of course tbh as good practice so it might be worth replacing. According to google the reason a car fails with high lambda readings is post combustion air leaks even if they are very small. I would check the exhaust system right up to manifold for any leakage. Did I read that you used Lee at Cotswold Porshe recently? It might be worth getting his advice as he's very knowledgeable and helpful. 1 Quote Link to comment Share on other sites More sharing options...
Kay Pee Posted December 13, 2020 Report Share Posted December 13, 2020 Car broke down when the other half was driving, thankfully round the corner from the house. Looked electrical, suspected the ignition switch but changing it didn't make a difference, all lights on as normal but just no cranking. 😕 Was suspecting the alarm unit as there's a bit of water ingress, but actually turned out Relay C1 (MFI-DI) had gone, taking out the engine management etc - could this be caused be a dodgy ign switch? Didn't see any burn marks when I took the old switch out and disassembled. Checking the MFI-DI relay tomorrow to see if that's the culprit. Was dead smug about having the new ign switch already (but hadn't actually bothered my ar*e fitting it of course) until I tried to fit it today and realised it's the wrong part! Must be for later cars (mine is a 98 2.5). Quote Link to comment Share on other sites More sharing options...
andy340r Posted December 14, 2020 Report Share Posted December 14, 2020 Fitted newly refurbished wheels and new tyres ... Very much a classic look. I had both my wheel sets Road Force balanced and it has completely resolved the vibration issues. It's like driving a brand new car now! Well worth the additional expense and the time taken to get to my nearest specialist. Quote Link to comment Share on other sites More sharing options...
Halfordwill Posted December 14, 2020 Report Share Posted December 14, 2020 Looks fantastic! just need some nice weather! Quote Link to comment Share on other sites More sharing options...
Clivescoobydo Posted December 14, 2020 Report Share Posted December 14, 2020 3 hours ago, andy340r said: Fitted newly refurbished wheels and new tyres ... Very much a classic look. I had both my wheel sets Road Force balanced and it has completely resolved the vibration issues. It's like driving a brand new car now! Well worth the additional expense and the time taken to get to my nearest specialist. That looks lovely....what colour is she? Quote Link to comment Share on other sites More sharing options...
andy340r Posted December 14, 2020 Report Share Posted December 14, 2020 20 minutes ago, Clivescoobydo said: That looks lovely....what colour is she? It is just plain old Guards Red. I see you have Lapiz Blue, that's a great colour as well. Quote Link to comment Share on other sites More sharing options...
½cwt Posted December 14, 2020 Report Share Posted December 14, 2020 Bad day WFH, so went for a 20 odd mile flat six fix for the hell of it just before dusk. Problems haven't gone away but I feel better at least for the distraction. 🙂 Quote Link to comment Share on other sites More sharing options...
Cheddar Bob Posted December 15, 2020 Report Share Posted December 15, 2020 Adding some new spice to the boxster today. Watch this space Quote Link to comment Share on other sites More sharing options...
Kay Pee Posted December 15, 2020 Report Share Posted December 15, 2020 Thankfully found the source of my alarm woes - a wobbly fuse C3. The alarm unit is in great nick, no signs of water or damage and at 22 years old I'm guessing that means it's been replaced at some point, before which someone's had to pull this fuse on a frequent basis. Found the water ingress point too - drivers door! Wondering if I can be arsed taking the carpets out or just get a dehumidifyer. Well I don't have a dehumidifyer...... 😝 Quote Link to comment Share on other sites More sharing options...
Sazzy Posted December 15, 2020 Report Share Posted December 15, 2020 An update on mine. Went for a retest today. Before which I did 70 odd miles, nice and hot, the old Italian tune up, even bunged a bottle of Wynnes fuel additive in. The result? Even worse !!!!!!! Lambdas now reading 1.06. No garage will look at it for me as they're all winding up for Christmas. No wonder I drink a lot of wine. 😖😢 Quote Link to comment Share on other sites More sharing options...
myfirstboxster Posted December 15, 2020 Report Share Posted December 15, 2020 9 hours ago, Kay Pee said: Thankfully found the source of my alarm woes - a wobbly fuse C3. The alarm unit is in great nick, no signs of water or damage and at 22 years old I'm guessing that means it's been replaced at some point, before which someone's had to pull this fuse on a frequent basis. Found the water ingress point too - drivers door! Wondering if I can be arsed taking the carpets out or just get a dehumidifyer. Well I don't have a dehumidifyer...... 😝 Sadly you might have to bite the bullet and take the carpets out , been there and done that with a car I had a leak with , draped the carpet over some wheelie bins to dry out , it took days to dry out fully , surprising how much water a carpet can hold ! Quote Link to comment Share on other sites More sharing options...
Cheddar Bob Posted December 15, 2020 Report Share Posted December 15, 2020 Added some new spice to the boxster today. Watch this space for the photos.... 😎 Quote Link to comment Share on other sites More sharing options...
edc Posted December 15, 2020 Report Share Posted December 15, 2020 1 hour ago, Cheddar Bob said: Added some new spice to the boxster today. Watch this space for the photos.... 😎 Some hot chili sauce with the unleaded? 😂 1 Quote Link to comment Share on other sites More sharing options...
edc Posted December 15, 2020 Report Share Posted December 15, 2020 1 hour ago, Sazzy said: An update on mine. Went for a retest today. Before which I did 70 odd miles, nice and hot, the old Italian tune up, even bunged a bottle of Wynnes fuel additive in. The result? Even worse !!!!!!! Lambdas now reading 1.06. No garage will look at it for me as they're all winding up for Christmas. No wonder I drink a lot of wine. 😖😢 I would definitely check for leaks. If the cats were kaput it should show on the rear lambdas. 1 Quote Link to comment Share on other sites More sharing options...
Sazzy Posted December 15, 2020 Report Share Posted December 15, 2020 1 hour ago, edc said: I would definitely check for leaks. If the cats were kaput it should show on the rear lambdas. The tester said the cats are ok as the HC and CO readings were ok? Quote Link to comment Share on other sites More sharing options...
Clivescoobydo Posted December 15, 2020 Report Share Posted December 15, 2020 36 minutes ago, Sazzy said: The tester said the cats are ok as the HC and CO readings were ok? Sorry to hear your of your 2nd failure, as Ed said check the system for leaks. Rev the car and get someone to stick their hand over the exhaust and track your way around it looking for sooty blow marks. Its probably the original exhaust which in itself is amazing that they last as long as they do. 1 Quote Link to comment Share on other sites More sharing options...
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