Hey everyone whats up? This isn't just another how to or why to convert to MAF thread...This ones a little different. Let me explain...
I bought a 1987 Mustang GT a few years ago that is Speed Density. Well after doing some mods to it, Cam, Intake, Throttle Body, Head Work etc., everyone knows that the parts don't play nice with the EEC. The car runs with some power, but still not up to par.
Ive been thinking about doing a MAF conversion to the car. While thinking of the conversion, and doing some research on what type of Harness I should get, as well as looking over the instructions on how to properly add a MAF Sensor and needed changes, I noticed that my car already has a stock Ford MAF Sensor installed along with the complete engine harness. Now my EEC is still a Speed Density DA1. Ive double checked and my car is a 1987 which wasn't equipped with anything for mass air. Ive also noticed that it has the notorious 8 pin female connector for the o2 harness instead of the 5 pin for '87. The actual o2 harness itself is still a 5 pin without the jumper wire that came in MAF '89 vehicles. Im supposing that one of the previous owners of the car had started to do a MAF Conversion and didn't finish it.
Ok now that ive tried to give as much detail as I could with out writing a book, on to the question.
In the Instructions for doing the conversion and installing the MAF meter, it says you need to add or change some of the 60 pin connectors around. Examples would be pins #9 and #50 need to be added. The thing is, that they are already running from the MAF Sensor to the those pins. All the pins in this link im posting up with this thread are already in their respective colors and places. Does that mean that I don't need to change any thing else around?
Also the link doesn't say I need anything for the purple and yellow jumper wire on the o2 harness that came in the '89 MAF vehicles. But from what I understand, you don't need that jumper wire if your using your stock '87 harness, and if your just spicing in the MAF sensor. Im assuming that I either have a late '88 or '89 MAF harness though.
Now for sure I know ive written a book...I guess the real question would be, can I just buy a A9L EEC and plug it in with out any worries and expect everything to start working? I know I have to do a few extra things like disconnect the MAP sensor vacuum hose. What im really concerned about is needing that Purple/Yellow jumper wire for the o2 harness, sense what im reading suggest that if its not wired up it wont read the o2 sensors, and if its wired up wrong, itll fry the EEC.
I feel like its common sense and ive answered my own questions, but I guess im just looking for some reassurance from some of you good people that's been down this road already. Im just confused because I wasn't expecting any of the work to be done like having a harness already. Also I just don't know where to begin since im not the one who started this conversion. Thanks in advance for whatever advice you guys can give me.
If there's anything else you guys need to know just ask. Im just lost on what I need to do to complete this process. Thanks again.
Heres the link that im basing the 60 pin connector off of which happens to be on this site.
http://www.stangnet.com/tech/maf/massairconversion.html
Heres another link from eBay of a guy describing the differences between the Harness's for different years.
http://www.ebay.com/gds/FOX-MUSTANG-SPEED-DENSITY-MASS-AIR-HARNESS-GUIDE-/10000000175794707/g.html
I bought a 1987 Mustang GT a few years ago that is Speed Density. Well after doing some mods to it, Cam, Intake, Throttle Body, Head Work etc., everyone knows that the parts don't play nice with the EEC. The car runs with some power, but still not up to par.
Ive been thinking about doing a MAF conversion to the car. While thinking of the conversion, and doing some research on what type of Harness I should get, as well as looking over the instructions on how to properly add a MAF Sensor and needed changes, I noticed that my car already has a stock Ford MAF Sensor installed along with the complete engine harness. Now my EEC is still a Speed Density DA1. Ive double checked and my car is a 1987 which wasn't equipped with anything for mass air. Ive also noticed that it has the notorious 8 pin female connector for the o2 harness instead of the 5 pin for '87. The actual o2 harness itself is still a 5 pin without the jumper wire that came in MAF '89 vehicles. Im supposing that one of the previous owners of the car had started to do a MAF Conversion and didn't finish it.
Ok now that ive tried to give as much detail as I could with out writing a book, on to the question.
In the Instructions for doing the conversion and installing the MAF meter, it says you need to add or change some of the 60 pin connectors around. Examples would be pins #9 and #50 need to be added. The thing is, that they are already running from the MAF Sensor to the those pins. All the pins in this link im posting up with this thread are already in their respective colors and places. Does that mean that I don't need to change any thing else around?
Also the link doesn't say I need anything for the purple and yellow jumper wire on the o2 harness that came in the '89 MAF vehicles. But from what I understand, you don't need that jumper wire if your using your stock '87 harness, and if your just spicing in the MAF sensor. Im assuming that I either have a late '88 or '89 MAF harness though.
Now for sure I know ive written a book...I guess the real question would be, can I just buy a A9L EEC and plug it in with out any worries and expect everything to start working? I know I have to do a few extra things like disconnect the MAP sensor vacuum hose. What im really concerned about is needing that Purple/Yellow jumper wire for the o2 harness, sense what im reading suggest that if its not wired up it wont read the o2 sensors, and if its wired up wrong, itll fry the EEC.
I feel like its common sense and ive answered my own questions, but I guess im just looking for some reassurance from some of you good people that's been down this road already. Im just confused because I wasn't expecting any of the work to be done like having a harness already. Also I just don't know where to begin since im not the one who started this conversion. Thanks in advance for whatever advice you guys can give me.
If there's anything else you guys need to know just ask. Im just lost on what I need to do to complete this process. Thanks again.
Heres the link that im basing the 60 pin connector off of which happens to be on this site.
http://www.stangnet.com/tech/maf/massairconversion.html
Heres another link from eBay of a guy describing the differences between the Harness's for different years.
http://www.ebay.com/gds/FOX-MUSTANG-SPEED-DENSITY-MASS-AIR-HARNESS-GUIDE-/10000000175794707/g.html