oldschoolmotors Posted January 10, 2009 Share Posted January 10, 2009 Please help me I cant find a good site that tells me the diagnostic procedures for my 1990 RB20E a31 cefiro. It was running fine one day and the next it seems as tho it has dropped a cylinder, being fuel injected and all electrical it could be a fault anywhere and I would like to see If the computer will tell me whats wrong before I go pulling things apart. It is totally stock standard granpappy spec so its not like the computer has to think about mods. Cheers I hope someone can help me. Quote Link to comment Share on other sites More sharing options...
Requiemk Posted January 10, 2009 Share Posted January 10, 2009 pull of individual leads as you run it and work out which cylinder its missing on. If you find you pull a lead and nothing changes thats your cylinder. inspect leads/plug and replace as necesary Quote Link to comment Share on other sites More sharing options...
oldschoolmotors Posted January 10, 2009 Author Share Posted January 10, 2009 Hey thanks for that Ive already done that seems to be no2 but its more of a miss rather than a cylinder totally not working I have a feeling it may be a blocked injector as there is a major 'tick' from the intake side also would a stuck lifter cause a cylinder to mis like that? I will replace fuel filter and run injector cleaner next week. Quote Link to comment Share on other sites More sharing options...
Requiemk Posted January 10, 2009 Share Posted January 10, 2009 Check the plugs? Take another lead off another cylinder and put it on and see if it runs on 4 or 5 to elimnate that side of things. Id think fuel issue would be spread across the entire engine not just one specific cylinder, worth a try thou Quote Link to comment Share on other sites More sharing options...
oldschoolmotors Posted January 10, 2009 Author Share Posted January 10, 2009 Yeah tru unless one injector has got shit stuck init. Ive texted a mate to c if he got any spare leads i can try id rather not go swapping leads around as access is quite difficult in places lol Quote Link to comment Share on other sites More sharing options...
Hemi Posted January 10, 2009 Share Posted January 10, 2009 Check the plugs? Take another lead off another cylinder and put it on and see if it runs on 4 or 5 to elimnate that side of things. Id think fuel issue would be spread across the entire engine not just one specific cylinder, worth a try thou do rb20e's have normal coils or electronic ones , a failed coil can cause those problems . but seeings as rb20's dont have individual coils im gonna asme thats not the problem . if the engine is like my ca18 (same kind of era-ish) theres a knob you turn with a screwdriver . its should be in the ful clockwise position , you turn it a 1/8th turn and go to diag mode 3 or 4 (the blinks indcate) , then when it blinks siad amount of time you turn full anticlockwise and it will spit out a code red is tens green it ones .. e.g 5 red 5 green = 55 . but being obd 2 i dont think it will help you a hell of alot im sure rb's have diff ecu's though Quote Link to comment Share on other sites More sharing options...
Hemi Posted January 10, 2009 Share Posted January 10, 2009 Check the plugs? Take another lead off another cylinder and put it on and see if it runs on 4 or 5 to elimnate that side of things. Id think fuel issue would be spread across the entire engine not just one specific cylinder, worth a try thou do rb20e's have normal coils or electronic ones , a failed coil can cause those problems . but seeings as rb20's dont have individual coils im gonna asme thats not the problem . if the engine is like my ca18 (same kind of era-ish) theres a knob o he ecu you turn with a screwdriver . its should be in the ful clockwise position , you turn it a 1/8th turn and go to diag mode 3 or 4 (the blinks indcate) , then when it blinks siad amount of time you turn full anticlockwise and it will spit out a code red is tens green it ones .. e.g 5 red 5 green = 55 . but being obd 2 i dont think it will help you a hell of alot im sure rb's have diff ecu's though Quote Link to comment Share on other sites More sharing options...
oldschoolmotors Posted January 10, 2009 Author Share Posted January 10, 2009 Hey Thanks for you help guys it seems to be no4 plug or lead shorting to the head as wen I unplug the lead from the dizzy cap the ticking noise i was talkn about goes away so now i have to pull all the induction pipes off to get to the spark plugs lol arnt rice burners so great lmao i so prefer my 1700 twin side draughted pushrod crossflow in my mk1 cortina lol Quote Link to comment Share on other sites More sharing options...
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