MattP Posted April 9, 2012 Share Posted April 9, 2012 Hi guys Im having issue with my 94 N/A Auto after cleaning the 2 02 sensors in the exhuast manifold, I carried out the maintenance as per Konrads thread on this forum IE:lemon juice and brake cleaner and drying via air compressor, however on refitting my sensors and cleaning my air filter and applying the light misting of oil on the aftermaket filter as advised by the manufacturer My car ran fine for 1 day and is now spluttering to the point I cant really drive it. Any Advise on what could cause this is it possible the air filters oil is gunking up a different sensor? Quote Link to comment Share on other sites More sharing options...
Colin-mkiv Posted April 9, 2012 Share Posted April 9, 2012 The oil has coated your intake sensors, preventing them from taking any readings. Cars with mafs etc hate the wet filter systems. I have only ever run them dry to combat this issue. Try unplugging the sensors while the car is running to see which makes most difference and clean it off. Quote Link to comment Share on other sites More sharing options...
FOSTA Posted April 9, 2012 Share Posted April 9, 2012 Hmmmmmm this sounds alittle like what My NA auto done after I fitted the turbo kit and it was down to the 02 sensors also, Just quickly try this mate : take the negitive battery terminal off then unplug the 2 sensors from there looms then reconnect the negitive terminal (but still leave the 02 sensors disconnected) then take if for a drive for 10-15mins if all seems fine then go and buy 2 oem lambda sensors, I know they are really expencive but at least you can drive your car and it might save you some money in the long run as you might get a little better mpg with new sensors as some of them have been in ours cars as long as 19 years lol Quote Link to comment Share on other sites More sharing options...
MattP Posted April 9, 2012 Author Share Posted April 9, 2012 Il try unplugging the sensors via your method Jamie but can anyone highlight the intake sensors I should clean please or point me in the direction of a thread that shows them as I am very simple and the search button is not being kind to me today. Regards Matt Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 9, 2012 Share Posted April 9, 2012 The oil has coated your intake sensors, preventing them from taking any readings. Cars with mafs etc hate the wet filter systems. I have only ever run them dry to combat this issue. Try unplugging the sensors while the car is running to see which makes most difference and clean it off. What 2 "intake sensors" are these then? Quote Link to comment Share on other sites More sharing options...
FOSTA Posted April 9, 2012 Share Posted April 9, 2012 I dont know if it's just me being thick here, but I dont think there is any outher sensors on the intake apart from the ICV and TPS on the throttle body but if they where bad I wouldn't of thought it would give you the problems you are having Mate :-/ You might find unplugging the o2 sensors will fix your problem. If your car was running fine before you started to take things apart to clean them. you will normally find it's somthing to do with what you have touched if it starts to run funny stright after Hope you get it sorted ASAP as I know myself, trying to find the problem is very frustrating and stressfull Quote Link to comment Share on other sites More sharing options...
MattP Posted April 9, 2012 Author Share Posted April 9, 2012 Must have been that cheap lemon juice haha:innocent: Quote Link to comment Share on other sites More sharing options...
Colin-mkiv Posted April 9, 2012 Share Posted April 9, 2012 mine has a temp sensor on the intake and isn't there a sensor inside the TB? Quote Link to comment Share on other sites More sharing options...
MattP Posted April 9, 2012 Author Share Posted April 9, 2012 tried disconnecting the 02 sensors and it made no difference further ideas welcome Quote Link to comment Share on other sites More sharing options...
FOSTA Posted April 9, 2012 Share Posted April 9, 2012 Hmmm start with the cheep basic stuff. like try new plugs if the ones that are currantly fitted are quite old. Make sure every thing you have touched is fitted correctly. Can you post a video up as this might help? Quote Link to comment Share on other sites More sharing options...
MattP Posted April 9, 2012 Author Share Posted April 9, 2012 Im gunna strip back the intake manifold and clean it out and fit some new plugs see if that cures the problem il post up a video if that fails Quote Link to comment Share on other sites More sharing options...
DodgyRog Posted April 9, 2012 Share Posted April 9, 2012 You have not said you have, but you have not had any water near the engine bay have you Quote Link to comment Share on other sites More sharing options...
MattP Posted April 9, 2012 Author Share Posted April 9, 2012 No no water in the engine bay dizzy cap,leads etc were all new a few months ago according to the bloke I bought it off they are blueprint branded so not oem Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 9, 2012 Share Posted April 9, 2012 The only type of intake sensor that air filter oil markedly affects is a hot wire air flow sensor. The N/A doesn't use one, so it won't be that. Quote Link to comment Share on other sites More sharing options...
MattP Posted April 9, 2012 Author Share Posted April 9, 2012 sad face well it all has to come apart so I can get at the plugs if all else fails Il pull out the MR2 for a bit till I can solve the problem Quote Link to comment Share on other sites More sharing options...
MattP Posted April 9, 2012 Author Share Posted April 9, 2012 (edited) Right then chaps I have took all the intake to bits and cleaned it with carb cleaner and ordered some new points and plugs as the ignition leads are looking a little worse for wear I think the culprit is a badly worn rotor arm though so il try replacing that and the dizzy cap whilst im on Edited April 9, 2012 by MattP (see edit history) Quote Link to comment Share on other sites More sharing options...
DodgyRog Posted April 9, 2012 Share Posted April 9, 2012 (edited) Have you looked down into the holes the plugs are in, see if there is any sign of moisture or oil, there should not be, it should be bone dry (per the other thread) Pull the leads of the plugs, but leave the plug in place and get a decent torch and look down inside, your symptoms are exactly the same as someone that has washed the engine bay and as you have an oil leak it could well be oil down there instead of water Sorry if you have already ruled it out, but you could be spending money for no reason Edited April 9, 2012 by DodgyRog (see edit history) Quote Link to comment Share on other sites More sharing options...
MattP Posted April 9, 2012 Author Share Posted April 9, 2012 There is oil in the number 5 and 6 cylinder holes so il probs pop the rocker covers off whilst im on and clean the lot up Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 9, 2012 Share Posted April 9, 2012 Right then chaps I have took all the intake to bits and cleaned it with carb cleaner and ordered some new points and plugs as the ignition leads are looking a little worse for wear I think the culprit is a badly worn rotor arm though so il try replacing that and the dizzy cap whilst im on I have yet to find an N/A with poor running that was fixed by new leads or a new cap or rotor arm, unless they were physically damaged. Most problems are wrong plugs, contaminants like water, oil, water / oil mix or other *rap down the plug wells, or air leaks into the manifold. It'll be "interesting" seeing how you get on changing the points Quote Link to comment Share on other sites More sharing options...
DodgyRog Posted April 9, 2012 Share Posted April 9, 2012 There is oil in the number 5 and 6 cylinder holes so il probs pop the rocker covers off whilst im on and clean the lot up That will be the smoke and misfire problem then, if you take the covers off, from memory the gaskets are about £25-£30 from Mr.T Quote Link to comment Share on other sites More sharing options...
MattP Posted April 9, 2012 Author Share Posted April 9, 2012 Il let you all know how it goes Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 9, 2012 Share Posted April 9, 2012 II think I have some new N/A gaskets in stock at half price. Quote Link to comment Share on other sites More sharing options...
FOSTA Posted April 9, 2012 Share Posted April 9, 2012 II think I have some new N/A gaskets in stock at half price. Are the TT and NA cover gaskets the same Chris? If so I might have one off you as Toyota have mine on back order and said they would ring me on the 5th but I still havnt had a call to say its in :-/ Quote Link to comment Share on other sites More sharing options...
David P Posted April 9, 2012 Share Posted April 9, 2012 ordered some new points That's novel. Quote Link to comment Share on other sites More sharing options...
Colin-mkiv Posted April 9, 2012 Share Posted April 9, 2012 What with my intake sensors and Bobskis Points, we're building a new hybrid, we'll let you know how we get on!! Quote Link to comment Share on other sites More sharing options...
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