aliveagain
Needs a life
Posts: 5033
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posted June 29, 2009 05:50 PM
High/low idle
When I let off the throttle and come to a stop,my idle stays at around 2500 rpms.Than after about 5 seconds,it drops down to 15-1300 rpms.I'm not sure if this is also related,but it will buck at 5-10% throttle sometimes.Any theories?
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KZScott
Needs a life
high on speed
Posts: 7235
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posted June 29, 2009 06:26 PM
maybe the throttle cables are tight and binding?(allmost closing all the way, then finally closing)
mapping?
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aliveagain
Needs a life
Posts: 5033
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posted June 30, 2009 04:01 AM
No way of knowing if it is mapping because the dyno readings aren't that low.I am wondering if my tps is getting corrupt.Sometimes when I go to take off,I have to work the throttle like a big turbo to bring the rpms up.
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I wondered why the baseball kept getting bigger. Then it hit me.
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entropy
Moderator
Posts: 8671
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posted June 30, 2009 08:33 PM
pete,
as above, 1st check that throttle cables are correctly adjusted, not pinched anywhere.
as you suggest, check TPS setting (1.086V?) at idle
i really doubt it is the map unless there are some crazy numbers in it
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Bilbreybuilt
Parking Attendant
Posts: 9
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posted July 01, 2009 08:52 PM
you can also check the throttle body sync if none of the others do any thing for you.
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Tazio
Parking Attendant
Posts: 18
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posted July 02, 2009 07:48 AM
Check for a vacuum leak,
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Tazio
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aliveagain
Needs a life
Posts: 5033
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posted July 09, 2009 04:00 PM
How would I check for a vacuum leak? Would I just spray some penetrating oil around the boots? I'm still fighting this problem.Great luck I have,snapped one of the TPS screws in the throttle body.Waiting on the wd40 to work now.
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I wondered why the baseball kept getting bigger. Then it hit me.
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aliveagain
Needs a life
Posts: 5033
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posted July 11, 2009 02:19 PM
I tried setting the TPS but could not get a good voltage reading.I have 5vdc supply but could never get above.009vdc on the setting.So I manually adjusted it to the highest rpm while idling and then brought it down by the idler screw.I also added some more fuel by way of the button for the low rpm circuit.What a difference that made.Smoothed out the idle and took away the bucking.This thing is pulling hard now! I forgot that it could light up the tire on just throttle at 30mph with a 260lb. fatass sitting on it.Happy happy!! Now to get the air shifter working and I can try a test and tune.
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I wondered why the baseball kept getting bigger. Then it hit me.
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