FireStormNBI Posted August 12, 2009 Share Posted August 12, 2009 (edited) please help me with my supra na auto, engine trouble.. i've already replaced the distributor cap and rotor.. is this a misfire? its like the engine is stalling.. its hard to explain.. trouble codes are present.. its different everytime i turn the key on first its 33 then 42 please watch the video http://www.youtube.com/watch?v=k4X6foEth04 need help from the supra geniuses.. your input is very much appreciated.. heres my supra.. J-Spec 1993 SZ Edited August 15, 2009 by FireStormNBI (see edit history) Quote Link to comment Share on other sites More sharing options...
SupraStar 3000 Posted August 12, 2009 Share Posted August 12, 2009 I have no idea mate but interested to find out. What happens when you take it out of manual mode? Quote Link to comment Share on other sites More sharing options...
FireStormNBI Posted August 12, 2009 Author Share Posted August 12, 2009 its not in manual mode mate.. its just lights on and off Quote Link to comment Share on other sites More sharing options...
SupraStar 3000 Posted August 12, 2009 Share Posted August 12, 2009 Thats strange. I'm no expert but could it be a electrical problem sending intermittent signals to your ECU. Not sure why a missfire would effect the MENU light. What were the circumstances when you first discovered the problem. Cold start or out driving? Any smoke? Can your hear a missfire (I have no sound at work) Quote Link to comment Share on other sites More sharing options...
FireStormNBI Posted August 12, 2009 Author Share Posted August 12, 2009 during driving.. then the rpm was erratic like the one in the video.. thought it was the timing at first.. but after adjusting the timing its still the same.. when i turn the ignition to ON the MANU light kinda blinks and turns on.. Quote Link to comment Share on other sites More sharing options...
Tom Posted August 12, 2009 Share Posted August 12, 2009 No expert here either but I thought i'd try to help a little To me it doesnt sound like it's missfiring, if this was my car i'd first be checking for air leaks, failing that i'd see if there was another owner that would be willing to swap parts over to see what could be causing the problem, the afm and the ecu would be items I'd check if you put your foot down from idle while driving does it stall? Quote Link to comment Share on other sites More sharing options...
FireStormNBI Posted August 12, 2009 Author Share Posted August 12, 2009 yes it does stall.. the rpm needle jumps down and up quickly like in the video even when accelerating... i have no parts to swap since my supra is the only supra in our city... Quote Link to comment Share on other sites More sharing options...
Tom Posted August 12, 2009 Share Posted August 12, 2009 i have no parts to swap since my supra is the only supra in our city... Damn I did imagine this would be this case It's an expensive route if you have to keep buying things to try out which is annoying Well check for air leaks first on your intake and do you have the stock air box fitted? or an induction kit? I'd also reset your ecu too, just to see if anything changes after that Quote Link to comment Share on other sites More sharing options...
FireStormNBI Posted August 12, 2009 Author Share Posted August 12, 2009 i have the ingen short ram intake.. i've already reset the ecu.. same problem Quote Link to comment Share on other sites More sharing options...
Miguel Posted August 12, 2009 Share Posted August 12, 2009 (edited) These might be of use to you.TESTS_WITH_CODES_NON_TURBO.PDFTESTS_WITHOUT_CODES_NON_TUR.PDF Edited August 12, 2009 by Miguel added file (see edit history) Quote Link to comment Share on other sites More sharing options...
FireStormNBI Posted August 12, 2009 Author Share Posted August 12, 2009 thanks mate.. i'll check it out Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted August 12, 2009 Share Posted August 12, 2009 (edited) check the map sensor , (manifold absolute pressure) sensor . if i start my car without the sensor connected to vacume the revs act in a verry similar manner. you may have a faulty sensor ? aditionalyy a air leak or loss of manifold pressure could be causing the sensor to amit fauls readings to the ecu , also causing this faut. if not have a look at the ignitor that feeds the disrtibutor. Edited August 12, 2009 by dr_jekyll (see edit history) Quote Link to comment Share on other sites More sharing options...
FireStormNBI Posted August 12, 2009 Author Share Posted August 12, 2009 check the map sensor , (manifold absolute pressure) sensor . if i start my car without the sensor connected to vacume the revs act in a verry similar manner. you may have a faulty sensor ? aditionalyy a air leak or loss of manifold pressure could be causing the sensor to amit fauls readings to the ecu , also causing this faut. if not have a look at the ignitor that feeds the disrtibutor. i'll try this tomorow mate.. thanks for sharing your knowledge Quote Link to comment Share on other sites More sharing options...
FireStormNBI Posted August 13, 2009 Author Share Posted August 13, 2009 i started the car this morning, cold engine just under 1k rpm.. then the engine dies.. white smoke on the exhaust Quote Link to comment Share on other sites More sharing options...
stevie_b Posted August 13, 2009 Share Posted August 13, 2009 (edited) 1000rpm is very low for a cold NA engine. Could it be that the automatic choke* isn't engaging properly? I don't know enough about that to advise further, hopefully someone who knows about the choke system will be along soon... * probably doesn't have a choke: I mean whatever system causes the engine to intentionally run rich when cold. Edited August 13, 2009 by stevie_b (see edit history) Quote Link to comment Share on other sites More sharing options...
Miguel Posted August 13, 2009 Share Posted August 13, 2009 What are the circumstances to which this started happening? Was the car driving fine and then this behavior started of its own accord, or did it happen after some intervention I.E you fitted something. Quote Link to comment Share on other sites More sharing options...
ellis Posted August 13, 2009 Share Posted August 13, 2009 Does the NA have a lambda sensor or similar (air mass meter?)? Sounds like the engine is readjusting for something. My old BMW used to do this and it was always the ruddy lambda sensors! Quote Link to comment Share on other sites More sharing options...
FireStormNBI Posted August 13, 2009 Author Share Posted August 13, 2009 What are the circumstances to which this started happening? Was the car driving fine and then this behavior started of its own accord, or did it happen after some intervention I.E you fitted something. as far as i can recall, i checked the timing and it was way too advanced, past the 20 degree mark, it was its original setting when i first had this car.. it went on without a hitch for more than 5000 kilometers. i thought it was too advanced since the toyota supra is supposed to be only at 10degrees. so i adjusted it back to 10.. then it went on fine after a few days.. then it started showing signs of stalling.. like the one in the video.. thinking it was the timing, i advanced it a little bit.. then it went fine again after a few days. then stall again.. i adjusted until im back to its original setting, still the same.. stall after a few kilometers.. now it wont start anymore.. Quote Link to comment Share on other sites More sharing options...
FireStormNBI Posted August 13, 2009 Author Share Posted August 13, 2009 Does the NA have a lambda sensor or similar (air mass meter?)? Sounds like the engine is readjusting for something. My old BMW used to do this and it was always the ruddy lambda sensors! this one dosent have the air mass sensor like the ones on other supras, this is 1993.5 supra.. only the IAT Sensor (intake air temp) Quote Link to comment Share on other sites More sharing options...
FireStormNBI Posted August 13, 2009 Author Share Posted August 13, 2009 i checked the ignition coil. resistance on the 2 terminals (positive and negative) is about .9.. and positive and lead resistance is about 13k.. out of specs, but is this the reason why its stalling. i wanna make sure coz ignition coil is not cheap. and i have to order it from the US... Quote Link to comment Share on other sites More sharing options...
FireStormNBI Posted August 13, 2009 Author Share Posted August 13, 2009 i hope you guys can help me. i am on my own on this one.. not even toyota here in our place can help me, cant trust them with a car they are not familiar with.. Quote Link to comment Share on other sites More sharing options...
stevie_b Posted August 13, 2009 Share Posted August 13, 2009 All I can suggest is going back to basics. The engine needs fuel, air and a spark to run, but if you're adjusting the timing I guess you're way past that stage of thinking. I've never had to test an ignition coil, so wouldn't know what to test for. Are you really in the Phillipines? (I ask because several users on here falsify their location). Maybe there's someone near you with an NA who would let you swap the coil for a few minutes. Quote Link to comment Share on other sites More sharing options...
Wez Posted August 13, 2009 Share Posted August 13, 2009 Maybe a dodgy idle control valve, engine sounds smooth when first starting, then after the ECU tries to pull the revs down to normal idle speed it cant hold it. TT UK/US = MAF based TT JAP = MAP based NA = (cant remember if its MAF or MAP) From memory all MKIVs have MAP sensors regardless if they are MAF or not, but the MAF will be used to correct fueling if its there. Quote Link to comment Share on other sites More sharing options...
FireStormNBI Posted August 13, 2009 Author Share Posted August 13, 2009 All I can suggest is going back to basics. The engine needs fuel, air and a spark to run, but if you're adjusting the timing I guess you're way past that stage of thinking. I've never had to test an ignition coil, so wouldn't know what to test for. Are you really in the Phillipines? (I ask because several users on here falsify their location). Maybe there's someone near you with an NA who would let you swap the coil for a few minutes. yes im really in the philippines.. cagayan de oro city Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 14, 2009 Share Posted August 14, 2009 How did you adjust the timing? And ignore the comments on your vid, they seem to think it's a MkIII Supra Quote Link to comment Share on other sites More sharing options...
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