Kirk Posted November 1, 2010 Share Posted November 1, 2010 Right guys i had a slight missfire not long ago which seemed to cure itself but when it occurred i pulled every possible thing to see if it was anything obvious, which there wasnt. Granted the plugs were a little sutty but nothing serious. I even checked the compression to see if it was internal related. 5 out of 6 were consistent and good and number 6 was a little low but nothing serious. Now I had changed everything prior to that, new plugs, rotor arm, dizzy cap, leads were totaly fine. As of this morning it appears to have returned, its more problematic when the engines cold but once its warmed up it seems fine. Also when coasting to the lights or stopped at the lights the idle jumps erraticly from 900 to almost 0 and oddly when i shut the door the bang seems to drop the idle for a moment. I havent checked anything as of yet but its something i would like to get sorted asap as it is annoying especially when its popping and farting on tick over. Idea's other than the basic's would be much appreciated Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted November 1, 2010 Share Posted November 1, 2010 Have you replaced the dizzy? The door thing makes me think it's electrical, like a bad connection somewhere. I take it this is your NA? Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 1, 2010 Author Share Posted November 1, 2010 Well i havent secretly bought a TT gaz As i said everything has been replaced including the dizzy and rotor arm. I do think it maybe a electrical fault but im absoloutly useless with electrics Quote Link to comment Share on other sites More sharing options...
Havard Posted November 1, 2010 Share Posted November 1, 2010 Got to be a loose connection or moisture getting in somewhere? H. Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 1, 2010 Author Share Posted November 1, 2010 Ill have another look later but eitherway its blatently annoying. Quote Link to comment Share on other sites More sharing options...
Nic Posted November 1, 2010 Share Posted November 1, 2010 Just some thoughts. Try ECU reset Battery terminals tight? Earthing points clean and tight? All pipes in engine bay connected? Double check distributor cap and rotor arm are fitted properly. Recheck spark plugs. O2 sensors last changed? Fuel filter last changed? Quote Link to comment Share on other sites More sharing options...
Nic Posted November 1, 2010 Share Posted November 1, 2010 Bonnet closed properly? Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 1, 2010 Author Share Posted November 1, 2010 Just some thoughts. Try ECU reset Battery terminals tight? Earthing points clean and tight? All pipes in engine bay connected? Double check distributor cap and rotor arm are fitted properly. Recheck spark plugs. O2 sensors last changed? Fuel filter last changed? ECU reset twice already. Battery terminals have been recently overhauled and are tight. All pipes connected that im sure of. Fuel filter is brand new O2 sensors havent been changed although i suppose its probly a good idea. May do the lemon juice method for now. Ill check the dizzy and rotor arm etc later on. Quote Link to comment Share on other sites More sharing options...
Nic Posted November 1, 2010 Share Posted November 1, 2010 Also have a read through the service manual HERE Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 1, 2010 Author Share Posted November 1, 2010 Bonnet closed properly? http://www.mkivsupra.net/vbb/vbpgimage.php?do=full&p=15571&d=1251317616 Hey That's a year old pic, her bonnet is always shut i think Quote Link to comment Share on other sites More sharing options...
Nic Posted November 1, 2010 Share Posted November 1, 2010 O2 sensors havent been changed although i suppose its probly a good idea. May do the lemon juice method for now. Knackered O2 sensors wouldn't cause a misfire, but it would run rich which can make it feel a bit lumpy at idle and low revs. Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 1, 2010 Author Share Posted November 1, 2010 No i didnt think so but last time it happened the plugs were rather sutty. Just wonder if the plugs need a good cleaning. See the thing is when the missfire isnt there it idle's perfectly and smoothly which is realy baffling me as its rather intermittent. Quote Link to comment Share on other sites More sharing options...
Havard Posted November 1, 2010 Share Posted November 1, 2010 Hey That's a year old pic, her bonnet is always shut i think Have you emptied your ash trays or have enough water in your tyres? Come on Martin, you are the man I'll come to when my car isn't working..... H. Quote Link to comment Share on other sites More sharing options...
Neil-NA Posted November 1, 2010 Share Posted November 1, 2010 What can i say Martin, your car is f*^ked mate...............guess you will need to sell me that ecu then. If you need owt of mine just give me a bell. Quote Link to comment Share on other sites More sharing options...
Nic Posted November 1, 2010 Share Posted November 1, 2010 Does it have a stock ECU? Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 1, 2010 Author Share Posted November 1, 2010 Yup still running on the stock ecu currently. Havent bothered trying the mines one yet. Quote Link to comment Share on other sites More sharing options...
Nic Posted November 1, 2010 Share Posted November 1, 2010 Ah okay just checking as Neil mentioned the ECU. Just another thought it might be worth checking the speed delimiter/speedo convertor or anything else spliced into the harness. Quote Link to comment Share on other sites More sharing options...
w41k3r Posted November 1, 2010 Share Posted November 1, 2010 the engine almost cutting out at stops...... I had that problem when my air filter was down in the bumper it was almost as if the engine wasnt getting the air up in it seems weird....... air filter in engine bay no problems if i put it back down in the bumper it causes it to sometimes stall out or almost stall the only misfire mines had was last winter early morning i started it and it was real ruff diff exhaust note switched it of reset the ecu then it was fine (obv youve tried this and it didnt work) have you checked the grounds? im sure one of them on mine was the cause for a dodgy idle it was covered in oil from the rocker cover gasket leaking cleaned it up and it was perfect again Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 1, 2010 Author Share Posted November 1, 2010 Update* Car ran perfectly fine all the way from work and that was from a cold start so now im realy confused Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted November 1, 2010 Share Posted November 1, 2010 Is there any play in the distributor itself, as in the shaft the arm sits on? Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted November 1, 2010 Share Posted November 1, 2010 Update* Car ran perfectly fine all the way from work and that was from a cold start so now im realy confused Told you Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 1, 2010 Author Share Posted November 1, 2010 Is there any play in the distributor itself, as in the shaft the arm sits on? Never thought of that one, ill have a look later. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted November 1, 2010 Share Posted November 1, 2010 If there is that might throw the timing out slightly, just another straw to clutch at Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 1, 2010 Author Share Posted November 1, 2010 Ok just checked the arm and there is next to no play in it. Think ill reset the ecu again and check the fault codes in the morning. Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 3, 2010 Author Share Posted November 3, 2010 (edited) Ok ive checked the ecu for error codes after the ecu reset and triggering the 'missfire' again and it has come back with a code 41 which is TPS signal. Now im guessing if the TPS is dodgy then it can cause the engine to 'jerk' on acceleration which is what it does. Im just wondering if its a jerk rather than a missfire. Does anyone have the correct adjustment spec's for adjusting the TPS? Edited November 3, 2010 by Kirk (see edit history) Quote Link to comment Share on other sites More sharing options...
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