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Mar 18, 2011 11:04:24 GMT
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Right , Gotta sort this quick.... Mot station didnt have any earlier slots so we cut it realy close to the mot expirary date. Just picked the car up (R reg 1.0 saxo) Its bright yellow and will get rims and slam when she gets her NCB. Id normally ask on a saxo forum, But I'm not a member of one and need help quick rather than when the saxo people let me ask questions..... Its failed on front brake imbalanced. Discs and pads and hope is what I'm going to do there. But the big one is emissions. Cat converters and lambdas arnt my thing... Can anyone understand these readings and point me at what bit to look at? If its any help the idle is a little erratic (sometimes) Fast idle test : C0%VOL- MAX LIMIT:0.300 ACTUAL VALUE: 0.621 =FAIL Second fast idle test: CO%VOL- MAX LIMIT:0.300 ACTUAL VALUE: 0.568 LAMBDA : MIN LIMIT:0.970 MAX LIMIT: 1.030 ACTUAL VALUE: 1.031 =FAIL Any ideas guys? As said realy at a push now as she relys on it for work any help you can offer is REALY appricated
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Last Edit: Mar 18, 2011 11:06:31 GMT by retrowagen1234
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dungbug
Posted a lot
'Ooligan!
Posts: 2,852
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Mar 18, 2011 11:14:59 GMT
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Not really my area either chap, my other half had a 1998 Fezza which had a fast idle. The Lambda sensor was the cause, changed it & duly solved the problem. I guess a fast idle would emit more out of the exhaust & in theory up the emmissions (?)
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Past: 13 VW Beetles from 1967 - 1974 Bay Window Campers (1973 & 1974) Mini's (1992 Cooper lookalike & 1984 '25 Anniversary) MK2 Polo Coupe S (1984 & 1986) MK2 Polo Breadvan (1981 & 1984) MK4 Escort (1989) MK2 Granada Based Hearse (seriously) Fiat Uno 60S (1986) Punto 60S (1998) Cinq (1997) 1998 Yamaha YZF600R Thundercat 2003 Ford KA
Current: 2004 Ford Focus (barely alive)
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Mar 18, 2011 11:22:21 GMT
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Could be Not realy sure tbh. Just been reading the pug 106 manual (only one we have) and the bosch SPI unit isnt adjustable. So if its injector fault rather than sensors then its going to be costly
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Mar 18, 2011 11:27:52 GMT
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My matyes misses Rover 216 failed on emissions, I took it for a quick blast round the bypass to get some heat into the cat then back to the mot station for a retest and it pasted without a problem. Might be worth a punt.
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'91 Mazda Eunos Roadster '89 Honda Integra EX-16 (Stolen by the misses) '88 Nissan Silvia - KA24DE (New Road Rally Slag Project) '73 Datsun 1200 - Still in bits round Ed's!?!
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Mar 18, 2011 11:40:58 GMT
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^This.
It's running a bit rich - it might just be cold, or it might need cleaning out. Either way an 'Italian Tune-up' should improve matters enough for it to pass - it's not a million miles off. Ideally wind it up to the red line in 3rd and hold it for a few minutes - check the oil and coolant beforehand though...
It might be worth checking the air filter too - if it's very dirty it might just be making it run rich.
It's unlikely to be the injector (they tend to flow less when they fail, causing lean running) or the ECU (they tend to fail completely so the car doesn't run). If it is a fault in the injection system it's most likely to be a sensor of one sort or another - I'd look at the lambda, air temp, coolant temp, and maybe the throttle position.
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bmw156
Part of things
Posts: 796
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Mar 18, 2011 11:41:42 GMT
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yeh i have always been told take it for a rag and it lowers them,
give it a go lol.
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Mar 18, 2011 11:54:08 GMT
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High Co is usually a gummed up or tired cat, yours don't look to bad though so as said above a good blat might clear it.
Book it in for an emssions test before the actual MOT rather than wait for a fail on the test.
oops extra 2
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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Mar 18, 2011 12:25:28 GMT
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Take it for a rag blow the carbon out then it should pass.
The CO figure suggests that your cat is past its best as that converts COs into far less harmfull CO2s
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Lawsy
Posted a lot
Posts: 2,615
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Mar 18, 2011 12:44:43 GMT
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you all beat me too it,
I was going to say just that
take it for a proper blast - my passat went in, failed on one and the other was very close, the tester said, go for a proper foot down blast down the bypass and pop back, so i did, 2 hours later it was back in and it passed
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prey
Part of things
Posts: 856
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Mar 18, 2011 13:03:03 GMT
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for co high get hold of some forte gas treatment - i always thought it was snake oil but i was converted - then stick that in a full tank and take it for a half hr motorway run then half hr through the back roads - should bring that down to suitable levels
also a full service would help
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Mar 18, 2011 13:59:57 GMT
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Wicked cheers guys I'm hopefully going to borrow a gastester.. Used to have one but got pinched... If all else fails I'm pulling the cat off and checking that out, Also might see if I can do the readings on the lambda... One thing I was wondering was.. Would putting a small gauze filter on the oil breather help? To prevent the engine breathing that curse word? i.e completely disconnected from the air inlet but plugged with a filter to stop it spraying crud on the engine. And also knock the airfilter out for the test?
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Last Edit: Mar 18, 2011 14:00:44 GMT by retrowagen1234
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Mar 18, 2011 14:23:02 GMT
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If it's breathing heavily then it might help - but OTOH you might get more blow-by gasses since the positive crankcase ventilation system won't be working properly.
Have a look at the air filter - if it's really manky then yes, removing it should help, otherwise probably not.
There's probably not much you can see to check in the cat. Also, since the lambda reading at your test was a bit out, the cat wouldn't have been working at max. efficiency anyway - this would account for the high CO reading. I'd look at getting the mixture right before worrying about the cat.
Give it a good run - I imagine it mostly does town mileage normally - and get the emissions tested before the retest to check that they are good. The lambda isn't far off, and the CO had reduced for the second test (after the rev, wait, retest cycle) - so I feel that a decent run to get it thoroughly hot would work wonders.
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Mar 18, 2011 15:00:35 GMT
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Not really an Italian 'tune up', as they drive like that all the time (only change gear when the valves are dancing on the bonnet)
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1993 Fiat Panda Selecta 2003 Vauxhall Combo 1.7DI van 2006 Mercedes Kompressor Evolution-S AMG SportCoupé
"You think you hate it now, wait til you drive it"
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Mar 18, 2011 15:08:59 GMT
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Well in that case ill give I'm taking it to down&outs house tonight then instead of the carlton... Rag up to surrey should do it some good ;D
As for the air filter... Its clean as a whistle. Even took the plugs out. They are old but clean..... Not running rich as far as i can tell.
You guys are probably right on the italian tune up idea...
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Mar 18, 2011 15:58:26 GMT
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I took a corsa for an mot last week an it failed the emmisions cos it had a couple of slight blows on the exhaust system.....replaced it and it went straight thru....
just a thought ;D
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1984 Subaru GLF Hatch 1983 Skoda 120LE Super estelle 1977 Subaru DL Wagon 1978 Datsun 120Y Coupe 1995 Skoda favorit estate
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Mar 18, 2011 17:00:16 GMT
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It's running a bit rich - it might just be cold, or it might need cleaning out. Either way an 'Italian Tune-up' should improve matters enough for it to pass - it's not a million miles off. Ideally wind it up to the red line in 3rd and hold it for a few minutes - check the oil and coolant beforehand though... It might be worth checking the air filter too - if it's very dirty it might just be making it run rich. It's unlikely to be the injector (they tend to flow less when they fail, causing lean running) or the ECU (they tend to fail completely so the car doesn't run). If it is a fault in the injection system it's most likely to be a sensor of one sort or another - I'd look at the lambda, air temp, coolant temp, and maybe the throttle position. It's running lean, surely? Lambda < 1 is rich, > 1 is lean.
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1989 Peugeot 205. You know, the one that was parked in a ditch on the campsite at RRG'17... the glass is always full. but the ratio of air to water may vary.
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Mar 18, 2011 17:47:35 GMT
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one of mine failed with similar results all tho co2 was a little less than yours, managed to get it thru after a good ragging and fixing a leak in the exhaust.
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Mar 18, 2011 17:58:54 GMT
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Rich606 has hit it on the head, the figure is lean, typically this is caused by a hole or leak in the exhaust some where between the manifold and the lambda, the extra air dragged through the hole entering the exhaust after the engine creates a lean figure.
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'A' series trigger wheels and sensor brackets, 205 GTi radiator brackets, general fabrication and machining - www.gsmotorsport.net
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Mar 18, 2011 18:20:29 GMT
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Asked my brother who is peugeot mechanic. Used to work for citroen. He said maybe lambda sensor or cat or may be getting to much air so is over fueling. He said you could try a code reader to check the lambda. He also said take it for a good thrashing. Top mechanic advice...haha. All this came after he went ooohhh gonna cost ya. lol.
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1999 micra. Puch bike and nirve chopper.
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