Coke Posted January 1, 2011 Report Share Posted January 1, 2011 I'm having difficulty accessing Pin A-17 on my ECU, for Pressure Sensor Output. I have a 1986 NON-Intercooled ECU and the board layout is different from the Intercooled model ECU. Whereas on an Intercooled model ECU, all of the pins are lined up next to each other, the NON-Intercooled Pins are stacked in 2 rows. A-17 happens to be on the bottom row...with the upper row in my way. How do I get to the bottom Pin? My ECU Layout:http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs761.ash1/165228_10150113790746672_505891671_7473199_4302637_n.jpg On the left, Connector A, Pin A-17 is all the way to the right...underneath Pin A-8. In the picture it looks like there is room, but really there isn't. Anybody have any tips they care to share? Link to comment Share on other sites More sharing options...
ColdScrip Posted January 1, 2011 Report Share Posted January 1, 2011 How are you connecting the pins in the first place? When needing access to a pin on a board i normally solder a wire to it. Link to comment Share on other sites More sharing options...
Komeuppance Posted January 1, 2011 Report Share Posted January 1, 2011 I just took the board off the casing, and soldered to the underside of the board. -Robert Link to comment Share on other sites More sharing options...
Coke Posted January 1, 2011 Author Report Share Posted January 1, 2011 I just took the board off the casing, and soldered to the underside of the board. -Robert That's what I just did. It worked. It's the only way I could make it happen. Link to comment Share on other sites More sharing options...
Komeuppance Posted January 1, 2011 Report Share Posted January 1, 2011 Yeah, but I said it first!! -Robert Link to comment Share on other sites More sharing options...
Coke Posted January 1, 2011 Author Report Share Posted January 1, 2011 Took it for a test drive. Not sure what's wrong here....but i mash on the gas, and it begans to pull slowly...then I get a burst of power...then it cuts back some.....then I get another burst. It's consistent thru all gears. It's not a full-on cut out, just feels like im letting up on the gas some. Link to comment Share on other sites More sharing options...
Komeuppance Posted January 1, 2011 Report Share Posted January 1, 2011 4.3v right?? Where did you ground it to?? What's your AF ratio?? -Robert Link to comment Share on other sites More sharing options...
Coke Posted January 1, 2011 Author Report Share Posted January 1, 2011 4.3v right?? Where did you ground it to?? What's your AF ratio?? -Robert Yes it's a 4.3v - 1 watt Zener Diode. I grounded it to the ECU ground PIN as described in the write up by Patra. IDK what my AF is, I haven't installed my wideband yet (still waiting to buy an exhaust) as I am still running a stock exhaust. Link to comment Share on other sites More sharing options...
Coke Posted January 2, 2011 Author Report Share Posted January 2, 2011 Just got home from a 2 hour drive down to my buddies place on the lake. The car drives fine. It just doesn't like boosting smoothly now. Link to comment Share on other sites More sharing options...
Metric-man Posted January 2, 2011 Report Share Posted January 2, 2011 (edited) I'm having difficulty accessing Pin A-17 on my ECU, for Pressure Sensor Output. I have a 1986 NON-Intercooled ECU and the board layout is different from the Intercooled model ECU. Whereas on an Intercooled model ECU, all of the pins are lined up next to each other, the NON-Intercooled Pins are stacked in 2 rows. A-17 happens to be on the bottom row...with the upper row in my way. How do I get to the bottom Pin? My ECU Layout:http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs761.ash1/165228_10150113790746672_505891671_7473199_4302637_n.jpg On the left, Connector A, Pin A-17 is all the way to the right...underneath Pin A-8. In the picture it looks like there is room, but really there isn't. Anybody have any tips they care to share? http://home.comcast.net/~DriftAbility/images/Komeuppance/19855ECU.jpg http://www.starquestclub.com/forum/index.php?showtopic=44907 http://www.starquestclub.com/forum/index.php?showtopic=56791&view I know your saying A17, but it looks like should be A4 to me. Edited January 2, 2011 by starion_cult Link to comment Share on other sites More sharing options...
StarquestRescue Posted January 2, 2011 Report Share Posted January 2, 2011 Is the diode in the right direction? For non intercooled cars it looks like a-17 to me. Should be a yellow wire in the harness going to it. Note that a-17 is in a different location in the non intercooled ecu plugs. It is easy to make a mistake if i look at the plug from the wrong side. That's why i like to check wire colors to make sure i am counting from the correct corner of the plug. Link to comment Share on other sites More sharing options...
Coke Posted January 2, 2011 Author Report Share Posted January 2, 2011 Is the diode in the right direction? For non intercooled cars it looks like a-17 to me. Should be a yellow wire in the harness going to it. Note that a-17 is in a different location in the non intercooled ecu plugs. It is easy to make a mistake if i look at the plug from the wrong side. That's why i like to check wire colors to make sure i am counting from the correct corner of the plug. Yep I realize that the IC and NON-IC ECU's have a different pinout, and board layout as well...as mentioned in the first post. I hooked the cathode (striped side) of the diode to the pressure sensor output pin as described by Patra. Link to comment Share on other sites More sharing options...
Coke Posted January 2, 2011 Author Report Share Posted January 2, 2011 http://home.comcast....ce/19855ECU.jpg http://www.starquest...showtopic=44907 http://www.starquest...EL&fromsearch=1 I know your saying A17, but it looks like should be A4 to me. Wrong. Your looking at an Intercooled ECU pinout. Link to comment Share on other sites More sharing options...
Metric-man Posted January 2, 2011 Report Share Posted January 2, 2011 (edited) OK sorry, I'm still confused because it is for the air intake temperature sender, not the pressure sender correct?A4 is the common circuit pin out between 83-86 (non intercooled) I believe your hooking it up to the pressure sender, if you look at the HKS diagram they state location "4" for each diagram although they show pin A17pin A17 is a (secondary) air intake temperature sender for (intercooled) vehicles in 86. I think it is a common mistake, and one that I made in previous post, and possibly HKS made also, because their (HKS's) diagrams are not from the FSMYou are not using an (intercooled) ECU although you have an (intercooler) on your 86 LE http://i1083.photobucket.com/albums/j382/Starion_Cult/HKSFCDletterkey.jpg?t=1293988514 The letter "P" is for "AFR" or "A/F" which is an acronym for "Air Fuel Ratio" The letter "B" is for 12v ignition, and the letter "E" is for groundhttp://i1083.photobucket.com/albums/j382/Starion_Cult/8386NONICHKSCORRECT.jpg?t=1293996843 ^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V^V http://i1083.photobucket.com/albums/j382/Starion_Cult/INTERCOOLEDHKSFCDCORRECTPINOUT.jpg?t=1293996843That helps me in the explanation that it is the pressure sender and not the air intake temperature sender. Edited January 2, 2011 by starion_cult Link to comment Share on other sites More sharing options...
Komeuppance Posted January 2, 2011 Report Share Posted January 2, 2011 http://home.comcast.net/~DriftAbility/images/Komeuppance/HKSFCD.jpgLocation 4 means where to find the ECU, it has nothing to do with pin outs. -Robert Link to comment Share on other sites More sharing options...
Metric-man Posted January 2, 2011 Report Share Posted January 2, 2011 Location 4 means where to find the ECU, it has nothing to do with pin outs. -Robertthanks robert Link to comment Share on other sites More sharing options...
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