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Old 4 Weeks Ago   #1 (permalink)
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Lloydminster   Alberta
Default My car is missing a TPS sensor, Do I need it?

I just picked up my secound 86 5.0L, & I have been driving it for almost two weeks. Then today I was looking at the engine & I relized my TPS wasn't there, just a white spade sticking up with the holes for the sensor. Car runs great has a little hesitation when I first take off when its cold but when its warm its great. Should I get a new sensor and put it on & would make any difference? Should there be more problems if theres no TPS?
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Old 4 Weeks Ago   #2 (permalink)
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Yes you need it. The ECM is running a limp mode.
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Old 4 Weeks Ago   #3 (permalink)
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So I should get a lot more power then? Just taught my other car was cammed.It has a roll cage & flowmaster ss exhaust with a offroad H pipe. Is there anything I should know about installing one?
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Old 4 Weeks Ago   #4 (permalink)
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just bolt it on,then check the voltage with a DVOM,green and black wire,voltage should read steady anywhere between .800 and .999

read this,about halfway down the page:
Summarized/Corrected Base Idle Reset Procedure
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Old 4 Weeks Ago   #5 (permalink)
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Thanks alot! very helpful.
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Old 4 Weeks Ago   #6 (permalink)
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So I went home at lunch & looking at the sensor found out it was still there but not hooked up. so i screwed it in the throttle body but if I test the green & black wire I get 1.5 or 1.4, test the sensor on my other 86 & I get about 1.2. Am I doing something wrong or are both sensor bad? was going to put the one that is 1.2 on but it wont fit unless I dremel the plate on the body. So I put the one on that reads 1.4-5 & it seems to be a little more responsive than it was with none, but i'm wondering if it could be better????? when I tested them in my hand unpluged that was when I got my lowest reading.
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Old 4 Weeks Ago   #7 (permalink)
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When you're checking the TPS, check it with the key on, engine off. If you check it with the engine running, it'll be higher.
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Old 4 Weeks Ago   #8 (permalink)
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I had everything off & was testing it with it unpluged from the harness, if i turn the key to on, without running would that be the proper way to test it?


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Originally Posted by EagleAutosports View Post
When you're checking the TPS, check it with the key on, engine off. If you check it with the engine running, it'll be higher.
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Old 4 Weeks Ago   #9 (permalink)
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Thaks for all the help, amazing difference!
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