Ok guys ...

Here is the story .. I recently "about a month ago " did a MPFI swap on my 91 DX and it ran great ... ECU threw codes but the thing ran awesome except for the idle ...
So far I ran a Mugen chipped PM6 and today I got my hands on a Virgin PM6 and it only threw one code .. fixed that really quick and the idle still pulsated-loped .. call it what you want.. it bounces between 800 and 2100 but drives fine ... haha.
I remember someone telling me that it is a Vacuum leak .. which I pretty much ruled out because I pulled an entire map sensor assembly with the hoses from a working car and put it in mine and it still did it .. and then took my map sensor assembly and put it in that car and that ran fine..

Any Ideas ?

Thanks

Phil

 

check your idler and your thottle?

 

well I am getting a SI throttle cable soon ... if that is what you mean ...

The Mani came of a working motor .. so I didn't screw with the idler at all ... I though if the idler was screwed up it would stay constant at a certain RPM ... where as mine keeps on bouncing....