Hey guys,
Im sure I will take some heat, but I have spent days reading through old posts and am just still having some questions about what I need to do to make my MAF conversion correct so please be gentle lol!
I have an 87 coupe that I converted from speed density and AOD to MAF and 5 speed back in 2004. Back then I purchased an 89 engine harness/computer and just swapped the complete thing versus installing the MAF plug kit. Im pretty sure I just plugged my stock (87)oxygen O2 sensor harness back in and I know I didn't do anything about the VSS, which my car already had, being a cruise control car. I have a tweecer RT on the car and some mild engine mods, AFR 165's, Crane 2020, GT 40 Intake, 24 lb injectors, etc.....and always had some nagging hanging idle issues that I just assumed were tuning problems but never could quite fix. I hardly drive the car so never worried too much, but lately it has gotten much worse. It starts a surging idle that kills the car when stopping and sometimes even right when starting, both with a/c on and off which all sound like VSS and perhaps O2 issues. After reading a ton of threads I realize my O2 problem is due to me still having my 87 O2 harness so I am already on the hunt for an 89 with the loop on it to take care of that part.
I have read through all the posts I can possibly find and everyone mentions connecting the 2 wires for the VSS and adding pins in the harness for them. I took my computer out and looked at my harness and see that I have no wire in the #3 position, but there is a green wire in the #6 spot. Do I need to just connect one of the VSS wires to that existing green wire and then add the other to the #3 position, or is the green #6 already connected somewhere? I guess I just always assumed swapping the entire 89 Engine harness fixed everything and I was pretty ignorant of the other items.
Sorry for the long post and for rehashing issues that have been talked about to death on here apparently. Just seemed like most post I read referred specifically to when people modified their original harnesses instead of just swapping them. I have been out of the scene for awhile and just kind of catching up again and want to get my car completed correctly after all these years if it isn't!
Im sure I will take some heat, but I have spent days reading through old posts and am just still having some questions about what I need to do to make my MAF conversion correct so please be gentle lol!
I have an 87 coupe that I converted from speed density and AOD to MAF and 5 speed back in 2004. Back then I purchased an 89 engine harness/computer and just swapped the complete thing versus installing the MAF plug kit. Im pretty sure I just plugged my stock (87)oxygen O2 sensor harness back in and I know I didn't do anything about the VSS, which my car already had, being a cruise control car. I have a tweecer RT on the car and some mild engine mods, AFR 165's, Crane 2020, GT 40 Intake, 24 lb injectors, etc.....and always had some nagging hanging idle issues that I just assumed were tuning problems but never could quite fix. I hardly drive the car so never worried too much, but lately it has gotten much worse. It starts a surging idle that kills the car when stopping and sometimes even right when starting, both with a/c on and off which all sound like VSS and perhaps O2 issues. After reading a ton of threads I realize my O2 problem is due to me still having my 87 O2 harness so I am already on the hunt for an 89 with the loop on it to take care of that part.
I have read through all the posts I can possibly find and everyone mentions connecting the 2 wires for the VSS and adding pins in the harness for them. I took my computer out and looked at my harness and see that I have no wire in the #3 position, but there is a green wire in the #6 spot. Do I need to just connect one of the VSS wires to that existing green wire and then add the other to the #3 position, or is the green #6 already connected somewhere? I guess I just always assumed swapping the entire 89 Engine harness fixed everything and I was pretty ignorant of the other items.
Sorry for the long post and for rehashing issues that have been talked about to death on here apparently. Just seemed like most post I read referred specifically to when people modified their original harnesses instead of just swapping them. I have been out of the scene for awhile and just kind of catching up again and want to get my car completed correctly after all these years if it isn't!