Munna Posted September 12, 2004 Share Posted September 12, 2004 Yesterday I install a brand new Hybrid FMIC to my r33 gtst. about 12 months ago I had a SAFC installed and tuned as I had flat spots (running to rich) the SAFC fixed that problem. I had being running 10psi before the cooler was installed but now I cant run anymore than 7 or the car seems mess and cough under load. I think this may be due to incorrect setting on my SAFC because now im getting so much more cool air. Do you need to get your SAFC retuned after the installation FMIC? Or am I on the wrong track what else could cause this? Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/ Share on other sites More sharing options...
Jay95R33 Posted September 12, 2004 Share Posted September 12, 2004 Using a FMIC will mean cooler inlet temps, so your SAFC may need a touch up tune. Although the coughing and missing sounds like a spark plug issue. Do you know what type of plugs you have and what size gap they are ? J Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1009561 Share on other sites More sharing options...
Munna Posted September 12, 2004 Author Share Posted September 12, 2004 Jay95R33 said: Using a FMIC will mean cooler inlet temps, so your SAFC may need a touch up tune.Although the coughing and missing sounds like a spark plug issue. Do you know what type of plugs you have and what size gap they are ? J Plugs are near brand new gapped at 0.8. pretty sure its no thats not the problem because the car was fine before the cooler went on. its hard to explain but the car is no realy missing its more of a hesatation might be a boost cut or something? Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1009580 Share on other sites More sharing options...
Munna Posted September 12, 2004 Author Share Posted September 12, 2004 anybody else had a similar problem after installing a new cooler Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1009645 Share on other sites More sharing options...
Guest Robo's Posted September 12, 2004 Share Posted September 12, 2004 Your SAFC will need to be redone but i shouldnt have thought it would make it spluttery. When i done mine it still ran fine with the old settings. I would be checking for leaks, trying clamping it up a bit more. I encountered this after the first test drive with the new FMIC. Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1009739 Share on other sites More sharing options...
GTR-Ben Posted September 12, 2004 Share Posted September 12, 2004 Try fuel pump.. i have seen a FMIC show up a weak fuel pump and do exactly as you are explaining. Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1010186 Share on other sites More sharing options...
Munna Posted September 13, 2004 Author Share Posted September 13, 2004 Checked all my piping connections all were nice and tight with no leaks. Called the guys form Ice performance they think that its probably overfueling again now that the engine is getting cooler denser air so im going to get it retuned Wednesday. I will let you all know how it goes. Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1010560 Share on other sites More sharing options...
rs73 Posted September 13, 2004 Share Posted September 13, 2004 same thing happens to my car, engine wasnt happy for anything above stock boost, and it was a dying fuel pump. Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1010602 Share on other sites More sharing options...
Munna Posted September 13, 2004 Author Share Posted September 13, 2004 I guess if it is a dying fuel pump they will be able to pick that up although I had my fuel pump checked out last service they said it was fine. Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1010609 Share on other sites More sharing options...
rs73 Posted September 13, 2004 Share Posted September 13, 2004 Just suggesting something that you should check. I know it doesnt make sense, even in my case, but that's what the solution for mine anyway. I've had my dying pump almost a year before it was detected. On dyno the car made good A/F ratio of around 11.5:1 but tweaking the SAFC just doesn't want to change this. Very weird but the stock ECU seemed to compensate for the lack of fuel and fiddled with the timing. Only found out about the fuel pump when testing the fuel pressure and that's it. Got it changed over to a bosch item and the car is happy now with 12:1 A/F ratio and 192.5rwkw (before it wont go past 152rwkw in any boost level). Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1010625 Share on other sites More sharing options...
Sydneykid Posted September 13, 2004 Share Posted September 13, 2004 Munna said: Yesterday I install a brand new Hybrid FMIC to my r33 gtst. about 12 months ago I had a SAFC installed and tuned as I had flat spots (running to rich) the SAFC fixed that problem. I had being running 10psi before the cooler was installed but now I cant run anymore than 7 or the car seems mess and cough under load. I think this may be due to incorrect setting on my SAFC because now im getting so much more cool air. Do you need to get your SAFC retuned after the installation FMIC? Or am I on the wrong track what else could cause this? My guess, freer flowing FMIC means more airflow. More airflow is detected by the AFM and signalled to the ECU which is going into rich and retard (engine protection) mode sometime erroneously called "over boost" protection. You don't need extra boost to get it. Just my guess of course, based on about 10 Skylines I have seen do exactly the same thing. Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1010654 Share on other sites More sharing options...
Munna Posted September 13, 2004 Author Share Posted September 13, 2004 Sydneykid said: My guess, freer flowing FMIC means more airflow. More airflow is detected by the AFM and signalled to the ECU which is going into rich and retard (engine protection) mode sometime erroneously called "over boost" protection. You don't need extra boost to get it.Just my guess of course, based on about 10 Skylines I have seen do exactly the same thing. Thanks for all your replies Rs73 I will get my fuel pump checked out while it is there. Sydneykid ive read some of your other posts about over boost protection and it made sense. If I understood correctly when I get my SAFC retuned it should fix the problem as they will be able to minipulate what flow the ECU thinks it is getting. Is that right? Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1010703 Share on other sites More sharing options...
Mark0 Posted September 13, 2004 Share Posted September 13, 2004 hrmm sounds liek the post I just started is the only fix if it is the engine retarding to get a SAFC or similar Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1010714 Share on other sites More sharing options...
NickR33 Posted September 13, 2004 Share Posted September 13, 2004 Sydneykid said: My guess, freer flowing FMIC means more airflow. More airflow is detected by the AFM and signalled to the ECU which is going into rich and retard (engine protection) mode sometime erroneously called "over boost" protection. You don't need extra boost to get it.Just my guess of course, based on about 10 Skylines I have seen do exactly the same thing. I get this exact symptom but ONLY when the car is cold... after almost exactly 15mins of driving it runs fine... go figure I suppose it will get worse when my FMIC goes in... might have to get it looked at... lol *so lazy* Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1010967 Share on other sites More sharing options...
Munna Posted September 13, 2004 Author Share Posted September 13, 2004 NickR33 said: I get this exact symptom but ONLY when the car is cold... after almost exactly 15mins of driving it runs fine... go figureI suppose it will get worse when my FMIC goes in... might have to get it looked at... lol *so lazy* Before I got my SAFC mine did a similar thing to what it is doing now only not as bad. you probly need to one to funny it only does it when its cold. Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1010988 Share on other sites More sharing options...
NickR33 Posted September 13, 2004 Share Posted September 13, 2004 yeah I've got a SAFC... still does it... only when cold... will get it looked at when the cooler goes in, prolly just the temp sensor rooted. Let me know if you find the problem. Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1011078 Share on other sites More sharing options...
Munna Posted September 16, 2004 Author Share Posted September 16, 2004 Well I took my car to ice performance in melbourne yesterday. Found that I had dirty coil packs and my plugs wern't gapped to 0.8. The last time I took my car to a local macanic I had new plugs put in and I asked them to gap them a 0.8. So all this I thought they were gapped correctly when they were not. very anoyed. Anyway after the coilpacks were cleaned and sparkplugs were regapped the missfiring was gone. So they retuned the SAFC and the result was 196 Kw at the wheels on 10.5 psi of boost. very happy with that result and I recomend Ice performance to anyone. Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1014695 Share on other sites More sharing options...
Guest Robo's Posted September 16, 2004 Share Posted September 16, 2004 Haha, i didnt know you get dirty coil packs after installing an intercooler. Nice results!! Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1014738 Share on other sites More sharing options...
wilch Posted September 16, 2004 Share Posted September 16, 2004 I'm getting a front mount installed on the weekend. Apart from full exhaust, pod (in cold air box), and electronic boost controller everything else is stock. Is there anything I should watch out for? wil.. Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1014766 Share on other sites More sharing options...
Munna Posted September 16, 2004 Author Share Posted September 16, 2004 Quote I'm getting a front mount installed on the weekend.Apart from full exhaust, pod (in cold air box), and electronic boost controller everything else is stock. Is there anything I should watch out for? Regap plugs to 0.8 install the cooler and see how you go. But you may find installing a SAFC or simmilar will give you a lot better results as your ECU will probably see all the extra air flow and richen your air fuel mixtures with hurts performance big time. Link to comment https://www.sau.com.au/forums/topic/50907-problems-after-installing-new-fmic/#findComment-1014779 Share on other sites More sharing options...
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