Anyone have their emissions sticker still on their hoods? California (or federal). Preferably '84 and up but any year is good too.
Can you look and see if it says to remove the vacuum advance hose to distributor when setting the timing? Some years may or may not but it will settle an argument at best or teach me something at the worst.
Thanks Tommy, anyone else?
Not the sticker but the back page of FSM
It's in the FSM in the EF & EC section near the TVV thermal vacuum valve. Need to know if it says to remove the vacuum advance hose to set the timing on Z24 and Z20 motors Z22 are good to..
Found it in my 85 FSM.it says to disconnect vacuum hose from distributor vacuum controller,and plug hose with proper plug.Run engine at about 2,000 rpm for about 2 minutes under no load.Then,run engine at idle speed and ensure that engine speed is below 1000 rpm.race engine two or three times under no load,Then run idle speed for one minute.Check ignition with timing light.3+-2 B.T.D.C.(AT;in drive)adjust as necessary,connect distributor vacuum hose,race engine two or three times under no load and run engine at idle speed.Check idle speed.M/T700+-100RPM(2wd)800+-100rpm(4wd)AT;650+-100RPM in drive.
You see I was under the impression that the whole reason for ported vacuum is so there is none at idle so that the dizzy runs at static 3 degrees to reduce idle emissions.
So what does a properly timed engine read if the vacuum line isn't disconnected.... how much higher does it read if any???
Joe, that is exactly how I would expect it to work. I have someone that sets it to 3 degrees with it off and plugged but it immediately jumps way up when connected. Must either have the idle too high or the vacuum is leaking in somehow.
Well thanks guys.