88351wtsi Posted October 31, 2014 Report Share Posted October 31, 2014 it is my understanding that a fuel cut defender isn't required for 88/89 conquests. Is this correct? Link to comment Share on other sites More sharing options...
SOTTY Posted October 31, 2014 Report Share Posted October 31, 2014 you are indeed correct Link to comment Share on other sites More sharing options...
markhansenconquest Posted October 31, 2014 Report Share Posted October 31, 2014 (edited) ^^^^^ so when I hook up my 88 ecu to my 87 I will be good to go ??? Edited October 31, 2014 by markhansenconquest Link to comment Share on other sites More sharing options...
StarquestRescue Posted October 31, 2014 Report Share Posted October 31, 2014 (edited) Yes. That does not mean you can run unlimited boost though. Edited October 31, 2014 by StarquestRescue Link to comment Share on other sites More sharing options...
ucw458 Posted October 31, 2014 Report Share Posted October 31, 2014 The FCD was for 83-86 cars. They had a map sensor and the ecu would fuel cut above a certain boost pressure. The FCD was just a resistor that fooled the ecu into thinking the boost was lower. 87-89 cars don't have a map sensor so the FCD does nothing. On 87-89 cars around 20 psi you are outflowing what the mass can read so the signal gets garbled and you get what feels like fuel cut. Link to comment Share on other sites More sharing options...
markhansenconquest Posted November 2, 2014 Report Share Posted November 2, 2014 thanks jeff learn new things everyday........... Link to comment Share on other sites More sharing options...
ucw458 Posted November 2, 2014 Report Share Posted November 2, 2014 thanks jeff learn new things everyday........... Thank SQR. He's the one who posted datalogs and proved it was mass overrun and not fuel cut. Link to comment Share on other sites More sharing options...
G54Bstore Posted November 19, 2014 Report Share Posted November 19, 2014 The potentiometer trick to full the map sensor on the firewall works just as good and cheaper more ghetto looking thought I suppose Link to comment Share on other sites More sharing options...
83stariontravis Posted November 20, 2014 Report Share Posted November 20, 2014 The FCD was for 83-86 cars. They had a map sensor and the ecu would fuel cut above a certain boost pressure. The FCD was just a resistor that fooled the ecu into thinking the boost was lower. 87-89 cars don't have a map sensor so the FCD does nothing. On 87-89 cars around 20 psi you are outflowing what the mass can read so the signal gets garbled and you get what feels like fuel cut. There are FCD's available that clamp the MAF signal to keep it consistent at high rpm/boost/tps. A circuit could be made to do this for the 87+ but a 1g or 2g MAF might be a better option. You can also open up the unmetered air portion of the maf as long as you don't go so far that the output maf frequency at idle is unstable or below 30-70hz if i remember correctly. Link to comment Share on other sites More sharing options...
jjohnson Posted November 21, 2014 Report Share Posted November 21, 2014 Cool now i know what this is i have one in its box not used with directions its an HKS . How much could i sell this for? Link to comment Share on other sites More sharing options...
jjohnson Posted November 21, 2014 Report Share Posted November 21, 2014 Cool now i know what this is i have one in its box not used with directions its an HKS . How much could i sell this for? Link to comment Share on other sites More sharing options...
IntercooledFlatty Posted December 9, 2014 Report Share Posted December 9, 2014 i gave mine away... Link to comment Share on other sites More sharing options...
MPGorBOOST Posted December 23, 2014 Report Share Posted December 23, 2014 How much boost????OLIVE IT!!!! Link to comment Share on other sites More sharing options...
jjohnson Posted December 24, 2014 Report Share Posted December 24, 2014 Lol now im starting to see the real value of the pile of extra parts i got with the 3 cars. At least i got 2-3 of extra under the hood parts i might need. Link to comment Share on other sites More sharing options...
IntercooledFlatty Posted December 26, 2014 Report Share Posted December 26, 2014 How much boost????OLIVE IT!!!! i see wut u did there Link to comment Share on other sites More sharing options...
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