98cobra+75280z Posted September 13, 2010 Share Posted September 13, 2010 can anyone help me figure out how to solve my AFM problems. i have a 75 280z with an 82 l28et swap and i can get it to run only if i push the door on the AFM open and help it get fuel, after that it runs and revs ok. it has trouble idling because the door on the AFM closes and then the car dies due to lack of fuel. is there a way to tune the turbo AFM to allow more fuel or is the unit just needing to be replaced.. any help is much appreciated.. thanks, Quote Link to comment Share on other sites More sharing options...
98cobra+75280z Posted September 14, 2010 Author Share Posted September 14, 2010 No one on here has tuned there AFM or no how and can help!!!! Quote Link to comment Share on other sites More sharing options...
loy Posted September 14, 2010 Share Posted September 14, 2010 (edited) Last post from this thread http://forums.hybridz.org/index.php/topic/57588-engine-miss-lean-condition-79-s130-project/ will help. Also here http://forums.hybridz.org/index.php/topic/11652-afm-adjustment-question/ Edited September 14, 2010 by loy Quote Link to comment Share on other sites More sharing options...
Gollum Posted September 15, 2010 Share Posted September 15, 2010 (edited) I really wouldn't recommend running the 75 AFM on the L28ET ECU. Tuning the AFM is always risky business, especially since they were revising the curve constantly. Even NA to NA year to year doesn't always play nice. (take this with a grain of salt though, as it's coming from someone who's currently very pissed off with the OEM efi and about to switch to MS) Sorry, reread that... so are you using the turbo AFM? If so, the AFM if untouched shouldn't be the problem. Edited September 15, 2010 by Gollum Quote Link to comment Share on other sites More sharing options...
98cobra+75280z Posted September 30, 2010 Author Share Posted September 30, 2010 its an 82 turbo afm all the electronics are from a 82 turbo car Quote Link to comment Share on other sites More sharing options...
Gollum Posted September 30, 2010 Share Posted September 30, 2010 Then it's most certainly not the AFM. You have a problem elsewhere. Check your fuel pressure, and check the head temp sensor via the FSM procedure. Quote Link to comment Share on other sites More sharing options...
98cobra+75280z Posted September 30, 2010 Author Share Posted September 30, 2010 the flapper door on the afm will not open at first unless you manually press it open, once you do that you have to keep the car under a slight rev to keep it from closing and dying. what could the head temp sensor do?? Quote Link to comment Share on other sites More sharing options...
Gollum Posted October 1, 2010 Share Posted October 1, 2010 The head temp directly controls the fuel table on the ECU, if it's not reporting the correct temp then you could end up extremely rich or lean. The AFM very rarely "goes bad" and I'd be willing to bed it's not the source of your problems. You're merely seeing the result of another problem through controlling the door manually. Quote Link to comment Share on other sites More sharing options...
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