1997 Throttle position sensor setting
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Cruiser
Joined: Jun 2012
Posts: 184
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From: North Bend Ohio
1997 Throttle position sensor setting
I need the voltage setting for 1997 TPS. Apparently there was a service bulletin for 1995 EFI models that had parts including the ECM switch to 1997 parts. My 1995 runs to lean. I'd rip out the magnetti morelli if it wasn't an all original 30th anniversary Ultra. All other sensors are new and set cottectly. Thanks
Outstanding HDF Member
Joined: Aug 2010
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From: Union,Ms
This probably won't be politically correct and if anyone wants to start bashing me, bring it on. I took a meter and set mine to the suggested voltage and it ran like s***. What I did was snugged those screws down where I could move it but it wouldn't move on it's own. I kept adjusting it and road testing the bike till I got it right.
Seasoned HDF Member
Joined: Aug 2008
Posts: 5,082
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From: Ohio
Switching to the updated 97-98 ECM was the bullentin for a ECM that had the ability to be reflashed or altered by a tuner, the 95's were locked. TPS setting can be checked but you are kinda doing a bandaid repair by altering a TPS to get a richer condition but checking it won't hurt.
Copied this from someone smarter than me, I have a 97 ECM if that is a direction you need to go.
First, back out the warm and cold idle screws so they're not affecting anything. Then disconnect the ISC actuator.
Backprobe (with a pin or anything small like that) the right-most wire on the TPS connector. Connect the positive lead of your multi-meter to that pin; ground the negative lead. With the ignition on and the engine cold, rotate the TPS until you get a voltage reading of .275. Tighten the screws being careful not to change the reading.
Next, turn the cold idle screw in until you get a reading of .60 to .64 volts.
Next, turn the warm idle screw in enough so the bike will idle. Warm the engine, and adjust warm idle to taste (about 1000 rpm's).
Copied this from someone smarter than me, I have a 97 ECM if that is a direction you need to go.
First, back out the warm and cold idle screws so they're not affecting anything. Then disconnect the ISC actuator.
Backprobe (with a pin or anything small like that) the right-most wire on the TPS connector. Connect the positive lead of your multi-meter to that pin; ground the negative lead. With the ignition on and the engine cold, rotate the TPS until you get a voltage reading of .275. Tighten the screws being careful not to change the reading.
Next, turn the cold idle screw in until you get a reading of .60 to .64 volts.
Next, turn the warm idle screw in enough so the bike will idle. Warm the engine, and adjust warm idle to taste (about 1000 rpm's).
Outstanding HDF Member
Joined: Aug 2010
Posts: 3,486
Likes: 6
From: Union,Ms
If your bike is running good, leave it alone, you are looking at a serious headache if you play around with the tps sensor. 95-96 efi bikes are temperamental and that's putting it lightly.
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Seasoned HDF Member
Joined: Aug 2008
Posts: 5,082
Likes: 2,159
From: Ohio
This probably won't be politically correct and if anyone wants to start bashing me, bring it on. I took a meter and set mine to the suggested voltage and it ran like s***. What I did was snugged those screws down where I could move it but it wouldn't move on it's own. I kept adjusting it and road testing the bike till I got it right.
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Outstanding HDF Member
Joined: Aug 2010
Posts: 3,486
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From: Union,Ms
If all you need is a richer mixture, Vance & Hines used to sell a fuelpak exclusively for 95-96 MM bikes. It has 3 enrichment pot screws to make the pulses longer. When I bought mine about 8 yrs ago it was on clearance, so it is going to be tough trying to track one down. As far as I know that was the only thing out there for a richer mixture.
Outstanding HDF Member
Joined: Aug 2010
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From: Union,Ms
You are currently under review by the Politically correct board for improper repair techniques, I have found a loop hole under Evo DIY admendment 1546.1 when repair practices used in a term of pioneering be determined as overrode by a Grandfather Clause filed by hands ons Harley owners, you are safe.