DLC / Scan Tool Service Mode Question when setting Timing

[gordond]

As a precaution to causing any damange, when do you put the Scan Tool/ Timing tool / Paper clip... into Service Mode

Would it be;

3.1. With the Engine off & the DLC connector in place, switch tool into Service Mode

OR

4.1. With Engine running, place tool into Service Mode



Service Manual #24 [page 291]

EFI / MPI Models
1. Connect timing light to number 1 spark plug wire.
2. Start engine and run at 1300 rpm until it reaches normal operating temperature.
3. Stop engine and connect the scan tool or timing tool to the DLC connector on the EFI/MPI wiring harness.
4. Start engine, allow rpm to stabilize.
NOTE: MEFI-1 models only, manually adjust remote control throttle lever to get 1200 engine
rpm.
NOTE: MEFI-2 and MEFI-3 models only, ECM will automatically adjust engine rpm to approximately 1200 rpm when put in the service mode on a scan tool or when using the timing tool.
5. Check ignition timing. If incorrect, rotate the distributor until timing is correct. Torque clamping screw to 18 lb-ft (25 Nm).
6. Recheck ignition timing.
7. Disconnect scan tool or timing tool from DLC connector.
8. If required, return remote control throttle lever to idle position and shut off engine.
9. Restart engine, increase rpm to 1300 then return to idle position slowly. Ensure that
engine returns to idle rpm. Readjust throttle cable, if required.
10. Shut engine off.


.........thx G

 

[muc]

Re: DLC / Scan Tool Service Mode Question when setting Timing

4.1. With Engine running, place tool into Service Mode
Is how I do it.
Good Luck Muc

 

[Fun Times]

Re: DLC / Scan Tool Service Mode Question when setting Timing

4.1. With Engine running, place tool into Service Mode
Is how I do it.
Good Luck Muc

X 2

 

[gordond]

Re: DLC / Scan Tool Service Mode Question when setting Timing

thanks guys for the clarification on this.

Got the timing set but now she idles very high. I'll be posting a new thread regarding this matter.
Cheers!