 Throttle Position Sensor (TPS), Dave, Brad and Cap'n and other FI experts |
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| mtndawg |
 Dec 23 2009, 11:24 PM
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Member  Group: Members Posts: 414 Joined: 26-January 09 From: Granite Bay, Ca Member No.: 9,985 Region Association: None 
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Can someone give me a good description of what the TPS signals to the ECU? My car was bucking when accelerating and when I would try to hold steady. I took the TPS out and cleaned it with electrical cleaner. It looks fairly worn and I get 18 clicks instead of 20. I think I'm supposed to hear 20. Now that it's clean (and adjusted) the car is running MUCH better, but I still hear only 18 clicks when I press the gas with the key on (and the engine off).
It's not bucking now, but now my idle is low at start when the engine is cold, then it's high (1500) when the engine is warm. I need to make some other adjustments, take a look at the trigger points and clean the screen at the bottom of the fuel tank too. ...so I want to know how the board and wipers signal the ECU? |
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| Bleyseng |
Dec 24 2009, 05:10 PM
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Aircooled Baby! Group: Members Posts: 13,036 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Ok, the poor idle subject has been covered a billion times....
First, reset the TPS to the Pelican article second, do a complete tuneup, adjust the valves, oil change, air filter, new air in the tires third, check all the vacuum hoses for leaks-replace all that leak four, drive the car until its hot, say for atleast 20 minutes around town. Now, set the idle speed and mix (knob on ECU). Best to use a CO meter or a LM1 (13.9 to 1) and a tach. Idle speed about 950rpms.... Now when the car is cold it should idle at about 1500-1700 then it slowly drops with a bit of hunting as it warms up to idle at 950. |
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Posts in this topic
mtndawg Throttle Position Sensor (TPS) Dec 23 2009, 11:24 PM
underthetire Did you calibrate it with the procedure once you t... Dec 23 2009, 11:33 PM Strudelwagon
Can someone give me a good description of what th... Dec 23 2009, 11:34 PM kg6dxn I can give you the generic version onf the TPS sig... Dec 23 2009, 11:44 PM
underthetire
I can give you the generic version onf the TPS si... Dec 23 2009, 11:50 PM mtndawg I've read pbanders site, which is super helpfu... Dec 24 2009, 12:55 AM etcmss setting the TPS is already addressed. But you sai... Dec 24 2009, 06:07 AM ConeDodger The clicks are only the initial adjustment. You ne... Dec 24 2009, 09:04 AM mtndawg Here's the way I understand the different part... Dec 24 2009, 11:43 AM ClayPerrine The TPS in a D-Jet system is not a variable resist... Dec 24 2009, 11:53 AM r_towle If you only hear 18 clicks, you have not adjusted ... Dec 24 2009, 12:32 PM mtndawg Thanks for the comments! I think my TPS adjust... Dec 24 2009, 02:11 PM zymurgist Babydoll had a problem where the wire came loose f... Dec 24 2009, 02:20 PM davesprinkle As a couple of other posts have mentioned, the dje... Dec 24 2009, 04:25 PM |
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