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Discussion Starter #1
Hi,

My car is 1994 DeVille 4.9, last week i replaced the EGR valve, the TPS and cleaned the throttle body.
After installing all parts, idle is very high (about 2200).
I done the idle learn procedure (13 minutes idle and all the other...) and it didnt help.
Also tried the TPS adjustment procedure - didnt help.
The PD01 shows .2 while engine OFF.
When i disconnect the TPS connector, the idle is normal but P022 code appears.

I noticed that the high idle is because the ISC screw is pushing the throttle, i checked the ISC with the PS03 override, and it work OK,
it goes all the way back when i press COOL until there is a gap from the trottle lever.

I suspect the TPS, the old one (was broken while removing the EGR valve) was adjustable (PN: 06584 C-0454), the new is not adjustable (PN: KEM 141-440).

Can you help me ?
 

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2005 CTS-V, 1994 Infiniti Q45
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7,658 Posts
It sounds as if possibly the fast idle cam is adjusted too high.......
 

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Registered
2005 CTS-V, 1994 Infiniti Q45
Joined
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7,658 Posts
The fast idle cam is on the throttle body..... Cant say for sure, but its gonna be near the <sorry for a lack of a better term> thing that pulls the throttle plate.....

No, I meant the FIC screw.... But you might try adjusting out the ISC screw first.... DONT MESS WITH THE FIC!!!!!
 
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