2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Idle keeps growin higher each time....

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Old Jun 23, 2004 | 01:22 AM
  #1  
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From: Oregon
Idle keeps growin higher each time....

My idle keeps growing each time I remove/install the UIM and TB-

When got the car 1k- perfect idle.
After removing TB for replacment of coolant line- 1.5k
After removing a second time for replacment 2k.

Whats goin on here. Nothing else is changing.
Im going to check the TPS and BAC tommorow- but this is just odd.

Does anyone have some pictures of how the ohm meter connects to the TPS plug so that I can do it correctly? Sucks being a visual learner some time.
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Old Jun 23, 2004 | 01:30 AM
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From: Spring Hill TN 37174
After removing the uimor tb did you replace the seals? If not i bet dollars to donuts you have a nice freindly vacume leak..spray carb cleaner around the base of the tb and the uim and if the car surges or acts like its gonna die..bingo...
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Old Jun 23, 2004 | 01:38 AM
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From: Oregon
Will do.

However I replaced the gasket the second time.
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Old Jun 23, 2004 | 12:25 PM
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Any other ideas to this?
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Old Jun 23, 2004 | 03:01 PM
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Hurm.
I have this strong wooshing sound, which Im pretty sure is a vacume leak like noted.

Looks like some -form-a-gasket- will have to do for now.

Im pretty sure I know why its doing this too-
After I bypassed the coolant line through the thottle body- I ran a hose from the back of the pump directly to the block- now I think the hose is causing a hump- not allowing it to sit flat. Looks like a bit of re routing and ill be good .
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Old Jun 23, 2004 | 03:18 PM
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From: Nashville, 37217
readjust your idle adjust screw
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Old Jun 23, 2004 | 04:03 PM
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From: Coldspring TX
If you still have to tweak the idle adjust screw after you've fixed your vac leaks, make sure you jumper the initial set coupler (left side, near leading coil) first...
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Old Jun 23, 2004 | 04:35 PM
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Originally posted by WAYNE88N/A
If you still have to tweak the idle adjust screw after you've fixed your vac leaks, make sure you jumper the initial set coupler (left side, near leading coil) first...

what does that do?
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Old Jun 23, 2004 | 07:02 PM
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From: Oregon
Replaced the gasket, re routed the hose, used some RTV, still holdin a 2k idle .
Starts- goes right to 2k.
Warms up- drops to 1.5k.



Sounds great however....

Going to adjust TPS next.......
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Old Jun 23, 2004 | 07:14 PM
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Just replaced the line from the BAC and intercooler ducting- it was craked and leaking.
A weak 1.5k idle is present.

Im hoping just a few more adjustments will help .
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Old Jun 23, 2004 | 07:19 PM
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From: Coldspring TX
FitnessStain- jumpering that plug tells the ECU that the idle is being adjusted, so it prevents the BAC from trying to keep the idle at 750 while you're tweaking (otherwise, that adjust screw won't do much for ya, because the ECU will activate the bypass air system to keep the idle where it thinks it should be...)
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Old Jun 24, 2004 | 02:19 AM
  #12  
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From: Oregon
Smack self.
My custom ACV block of plate from 3/16th aluminum sheet doubled up- warped-

That was the leak .

Car runs great.

EXCEPT- I think I need a Fuel Cut defender- Fuel cut off at 5-7k :p
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