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Jeep Wrangler YJ
YJ General Discussion
TPS setting
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<blockquote data-quote="Eric Haberli" data-source="post: 439442" data-attributes="member: 21062"><p>HI Doef, Thanks for all of this information. Unfortunately This is a 1990 YJ with a 2.5L with a single fuel injector mounted in the throttle body. This YJ only has 118,000 miles on it. Being 33 years old I immediately did a major tune up on the engine and replaced all sensors, ignition system, hoses, alternator, water pump and fuel pump with filter.</p><p>MY fuel pressure for this unit is 14 PSI. and it doesn't have an engine check light so there is no codes.</p><p>I have just changed TPS for the 4 th time this time using a NTK unit and There is a noticeable difference. Now that I have said all this, I was asking if input voltage 5.13 volts was ok? the book says 5 volts. with WOT at 4.6-7 Volts. I have set the TPS 2 ways one is 5.13 X .17 which out put at closed throttle is O.8721. I have also set the TPS at 4.7 volts at WOT. There is no applicable difference in performance other than the hesitation moved from 1600 -1700 RPM to 2300-2400 RPM? Its funny you mentioned, running lean. my MPG has been 14.7. sense playing with TPS the milage is now 16.24 MPH. I did a plug check and I have nice tan burn. </p><p>I'm thinking it s the computer !!!!. The engine runs great very smooth with adequate power for a 4 banger.</p></blockquote><p></p>
[QUOTE="Eric Haberli, post: 439442, member: 21062"] HI Doef, Thanks for all of this information. Unfortunately This is a 1990 YJ with a 2.5L with a single fuel injector mounted in the throttle body. This YJ only has 118,000 miles on it. Being 33 years old I immediately did a major tune up on the engine and replaced all sensors, ignition system, hoses, alternator, water pump and fuel pump with filter. MY fuel pressure for this unit is 14 PSI. and it doesn't have an engine check light so there is no codes. I have just changed TPS for the 4 th time this time using a NTK unit and There is a noticeable difference. Now that I have said all this, I was asking if input voltage 5.13 volts was ok? the book says 5 volts. with WOT at 4.6-7 Volts. I have set the TPS 2 ways one is 5.13 X .17 which out put at closed throttle is O.8721. I have also set the TPS at 4.7 volts at WOT. There is no applicable difference in performance other than the hesitation moved from 1600 -1700 RPM to 2300-2400 RPM? Its funny you mentioned, running lean. my MPG has been 14.7. sense playing with TPS the milage is now 16.24 MPH. I did a plug check and I have nice tan burn. I'm thinking it s the computer !!!!. The engine runs great very smooth with adequate power for a 4 banger. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
TPS setting
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