Not your everyday TPS question.
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Not your everyday TPS question.
I tried to set my TPS using the light method the other day. I could not get only one of the lights on using the adjustment screw. The only way i could get one on and the other off is if i ever so lightly press on the throttle. And i mean i BARELY have to press on the throttle at all. Now my question is could my throttle stop screw be a little out of adjustment so that the throttle is coming too far closed?
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Originally posted by Aaron Cake
Don't use the light method. Use the resistance method. So much more accurate.
Don't use the light method. Use the resistance method. So much more accurate.
James
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Ok well you know better than me thats for sure. Its raining and super shitty weather here in tennessee right now and no garage so i cant check it today. Do you know what wires i need to check?
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I have an idea which ones but i just want to double check it looks in this pic like it is a B/R wire and then a multi colored green/white/red am i seeing that right?
http://fc3spro.com/TECH/HOWTO/TPS/tps4.jpg
http://fc3spro.com/TECH/HOWTO/TPS/tps4.jpg
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yeah i totally agree with that Aaron but just the way my idle is makes me think that it isnt a vac leak. Sometimes it will hold so steady at 750 its not even funny but then others it will hold steady at 900 all day then the next day it will idle at 1100 for half a day and then 800 the rest of the day. But they are always strong idles.
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Re: Not your everyday TPS question.
Originally posted by Rotory
I tried to set my TPS using the light method the other day. I could not get only one of the lights on using the adjustment screw. The only way i could get one on and the other off is if i ever so lightly press on the throttle. And i mean i BARELY have to press on the throttle at all. Now my question is could my throttle stop screw be a little out of adjustment so that the throttle is coming too far closed?
I tried to set my TPS using the light method the other day. I could not get only one of the lights on using the adjustment screw. The only way i could get one on and the other off is if i ever so lightly press on the throttle. And i mean i BARELY have to press on the throttle at all. Now my question is could my throttle stop screw be a little out of adjustment so that the throttle is coming too far closed?
Using lights: Fully HOT engine. Turn the TPS adjustment screw fully anti clockwise til it almost falls out. Now screw clockwise, slowly til the first light comes on. Now even slower, keep turning the screw clockwise slowly til both lights come on. Now even slower, turn the screw anti clockwise til only one light is on. DONE, THROUGH, FINI.
Now if you have a series four, backprobe the green/red wire on the TPS plug and you'll see you have .....one volt plus or minus .05. Been there, done that. Same results each and every time using the light method and getting a one volt result as the output of the TPS.
One more time: FULLY HOT ENGINE. And no dilly dallying around setting the TPS!
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Hey now the engine was fully hot...i had just finished running 90mph against a friend of mine on the way back to my house. when i got to my house i let it idle for about 2 minutes because i had been using alot of boost then i shut it off and promptly took off the intercooler and tried setting the TPS. the engine had been off maybe a full 3 minutes before i tested the TPS it shouldve ben fully warm still at that point right?? I wasnt dilly dallying either im trying my best, although i might not be the brightest bulb in the pack
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And on another note...i dont think my thermowax is even engaging because i hardly ever get the fast idle on startup...maybe 1 out of every 100 starts does it actually do the fast idle.
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Originally posted by Rotory
Hey now the engine was fully hot...i had just finished running 90mph against a friend of mine on the way back to my house. when i got to my house i let it idle for about 2 minutes because i had been using alot of boost then i shut it off and promptly took off the intercooler and tried setting the TPS. the engine had been off maybe a full 3 minutes before i tested the TPS it shouldve ben fully warm still at that point right?? I wasnt dilly dallying either im trying my best, although i might not be the brightest bulb in the pack
Hey now the engine was fully hot...i had just finished running 90mph against a friend of mine on the way back to my house. when i got to my house i let it idle for about 2 minutes because i had been using alot of boost then i shut it off and promptly took off the intercooler and tried setting the TPS. the engine had been off maybe a full 3 minutes before i tested the TPS it shouldve ben fully warm still at that point right?? I wasnt dilly dallying either im trying my best, although i might not be the brightest bulb in the pack
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I agree with J-Rat, I've used all 3 methods of TPS adjusting, and noticed that the resistance and voltage methods will give you a tolerance of one full turn or more of the adjustment screw, whereas the light method (which I use 2 meters for) gets you within about 1/2 turn...I gotta admit, though, I didn't notice any difference in driveability using either methods...
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