My Z is a little too eager

[lemming]

I have a '74 260Z (pre-fuel injection 280s), and sometimes when the engine gets warm, it will start to idle fast when I come to a stop light. To remedy the problem (until I come to a stop again) I can pull on the choke and then turn it off, and for whatever reason, the car will return to a normal idle.

I got work done on the car about 1000 miles ago, and they said that one of the accelerator pedal hinges was worn out/installed incorrectly, so they drilled a new hole and so now I would get the full extent of the acceleration range. So yeah, that worked for about a week, and now it feels like it did before.

Have any of you guys had this problem before? And if so, might you know a more permanent solution than what the auto body shop did?

Thanks much!!!

[Ed]

Does your car still have the original "flat top" carbs?

[Sean240Z]

Check the following thread:

http://www.classiczcars.com/forums/showthread.php?t=19272&highlight=choke

It could be a sticking choke.

Cheers,

[lemming]

I do not have the original "flat top" carbs. I replaced them with Holley carbs. As for the sticking choke, this is a possibility... I'm reading.

[sblake01]

I am unfamiliar with the workings of the carbureated cars but do the have some type of altitude switch like the efi cars? I remember having that problem with my 78 and adjusting the altitude switch cured it.

[28Zero]

sblake01, where is the altitude switch and how did you adjust it? I have the same high idle problem when the engine gets warm on my 78 280z

[andrewg3300]

my rake booster was leaking only when i pushed on the brake. it as sucking air and getting to lean. possibility?

[sblake01]

sblake01, where is the altitude switch and how did you adjust it? I have the same high idle problem when the engine gets warm on my 78 280z

It's located under the dash on the driver's side above and to the left of the clutch pedal but it's only on California cars.