setting idle speed on '88GT

Philossifer · 04-23-2003, 09:23 AM

82 GT,
I was wrong abour remapping the ECM but the procedure for setting the idle is different on Speed Density cars as opposed to Mass Air cars! The fact that you were able to set the idle was probably a fluke!

I'm glad it worked for you but just in case, here's the procedure if you have a problem in the future....

Sorry about the misunderstanding!
Phil

This is what PKRWUD wrote:

Pre-checks:

-Make sure the engine is warm, and the tranny is in Park or Neutral.

-E-brake on.

-Heater and accessories off.

-Throttle lever fully resting on the stop screw.

-Run a quick test, and make sure it passes. If it doesn't, correct
the problems, reset the ECM, and test again. Do this until it passes.

-Connect an accurate tach to the engine.

1. Reset the ECM.

2. Disconnect and plug vacuum at EGR.

3. Place a .025" feeler between the throttle lever and the stop
screw.

4. Start engine and run at 2500 rpm for 30 seconds.
a) If rpm too low, check the throttle plate for a plug.
b) If there is a plug from someone else, pull it.

5. Turn the stop screw to set the idle to 650 - 700 rpm.
a) If rpm is too high, shut off engine and remove the air cleaner
hose.

6. Block the plug hole in the throttle plate.
a) If there is no plug, hook up the hose from the air cleaner, and
check the rpm again.
b) If the engine stalls, open the throttle plate slightly with the
stop screw.
c) If the plate did have a plug, remove the throttle plate, and
install the correct plug (they're color coded in a kit available from Ford)

7. Recheck rpm to 650 - 700 rpm. Turn plate stop screw ONLY clockwise (the plate will likely stick if you turn it ccw).

8. Remove the feeler, turn the key OFF, restart, and allow to idle
for 2 minutes.

9. Engine off, and reset the ECM again.

10. Run KOEO Self Test. Look for TPS codes.

11. If no codes found, start engine, and run for 2 more minutes.
Goose the engine, and allow it to return to idle. Check the idle speed, and verify that the problem is solved.

The service kit with the go/nogo guage pegs used to check the plug size for the throttle plate is part number FOPZ-9F652-A

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04-23-2003, 09:23 AM	#21
Philossifer Registered Member Join Date: Apr 2003 Posts: 69	82 GT, I was wrong abour remapping the ECM but the procedure for setting the idle is different on Speed Density cars as opposed to Mass Air cars! The fact that you were able to set the idle was probably a fluke! I'm glad it worked for you but just in case, here's the procedure if you have a problem in the future.... Sorry about the misunderstanding! Phil This is what PKRWUD wrote: Pre-checks: -Make sure the engine is warm, and the tranny is in Park or Neutral. -E-brake on. -Heater and accessories off. -Throttle lever fully resting on the stop screw. -Run a quick test, and make sure it passes. If it doesn't, correct the problems, reset the ECM, and test again. Do this until it passes. -Connect an accurate tach to the engine. 1. Reset the ECM. 2. Disconnect and plug vacuum at EGR. 3. Place a .025" feeler between the throttle lever and the stop screw. 4. Start engine and run at 2500 rpm for 30 seconds. a) If rpm too low, check the throttle plate for a plug. b) If there is a plug from someone else, pull it. 5. Turn the stop screw to set the idle to 650 - 700 rpm. a) If rpm is too high, shut off engine and remove the air cleaner hose. 6. Block the plug hole in the throttle plate. a) If there is no plug, hook up the hose from the air cleaner, and check the rpm again. b) If the engine stalls, open the throttle plate slightly with the stop screw. c) If the plate did have a plug, remove the throttle plate, and install the correct plug (they're color coded in a kit available from Ford) 7. Recheck rpm to 650 - 700 rpm. Turn plate stop screw ONLY clockwise (the plate will likely stick if you turn it ccw). 8. Remove the feeler, turn the key OFF, restart, and allow to idle for 2 minutes. 9. Engine off, and reset the ECM again. 10. Run KOEO Self Test. Look for TPS codes. 11. If no codes found, start engine, and run for 2 more minutes. Goose the engine, and allow it to return to idle. Check the idle speed, and verify that the problem is solved. The service kit with the go/nogo guage pegs used to check the plug size for the throttle plate is part number FOPZ-9F652-A