1976 Injected Fleetwood, idle too high

[76eldo]

I just purchased a really nice 53,000 mile '76 Fleetwood.  It's got injection, and the idle is way too high.

Any quick tips on adjustment?

I took a quick look, and did not see a throttle stop screw.

Thanks,

Brian

[bcroe]

Don't adjust the idle air bolt yet.  Try pushing down on the idle air heater valve (black plastic on top of the throttle body with 2 wires) after warmup and see if it slows down.  If so this valve isn't closing all the way. 

The idle air valve is in the throttle body.  The assembly may be removed by removing the electrical plug and air cleaner stud, and turning the plastic block 1/4 turn.

The idle speed may fail to shut all the way down if the idle air valve does not close all the way.  Usually this can be fixed by use of an extra spacer (like a dime) of some .040" to .080" thick in the center of the moving part of the valve.  Power is supplied from the fuel pump circuit, which will shut down after 10 seconds if the engine is not running.  If power does not flow through
the circuit, idle speed will be very high.

You can see pictures of this at my PHOTOBUCKET:  http://s93.photobucket.com/albums/l71/bcroe/

(that is a lower case "L"71, not an upper case "i"71)

  click on an Album at left
  click on a picture to enlarge, or
  click on "view as a slide show"

Bruce Roe CLC # 14630

[76eldo]

Thanks.

I will check this first and let you know.

Brian

["Cadillac Kid" Greg Surfas 15364]

Brian, with 53K in 33 years chances are a good cleaning of the fast idle components might prove worthwhile.
Greg

[Dave Shepherd]

Good advice on the idle air heater control, seems like back in the day we replaced every one on these engines, when we couldn't get them we shimmed them to make up the distance, but the fast idle was then lower when cold.

[76eldo]

It's cold nasty and rainy here in the Phila area, and this car is outside at the moment.  I ran out of room!!!

Thanks for the tips, and I will give this a shot on the next decent day.

Thanks,

Brian

[35-709]

So ---- we'll be hearing from you about this sometime next May then?   

[76eldo]

 

Supposed to clear up and go up to 70 on Mon-Tues...

Brian