Amskeptic wrote:WaterDawg wrote:so after turning the screw all the way clockwise, she ran just above 350...thought all was good, but then I turned East again and she climbed up to 400-450!
Turns out that I was being hit with a 30-40 mph cross wind coming out of the south and blowing north. There was so much wind force, she was working extra hard, but as soon as I would turn north (I'm in the Dakotas so the roads go N/S or E/W LOL) she'd drop down to about 360*
Going to check the timing tomorrow morning before I start.
I have a Timing Light with a Tach on it now too.
Are you Dakota Digital or the hated spawn of Satan VDO?
Adjust the timing at 3,200-3,400 rpm to 28* BTDC. For FUN . . . write down your highway numbers at 65 mph with all variables noted, then retard the timing to 25*BTDC, and drive as similarly as possible and let us know.
You have very nice head temps until you are on the road under load, so we want to richen your high rpm/load side of the map without turning the idle into Bejing.
If you are bottomed out in the mixture screw, do the following:
Warm up engine. Shut if off.
Set the AFM mixture screw to 4 turns out from the bottom.
Reset the black cog 6 turns clockwise.
(your engine may barely run now)
Look at the little iddybiddy teeth on the wiper thing that dances all over the place.
Make a paint match-mark between the chromy metal plate upon which it sits and one of the teeth.
Loosen the screw that holds the wiper.
Move wiper 1/2 tooth towards rich (this is a powerful adjustment), lightly set the screw so it won't move here.
Start engine. Let it warm up. Check your mixture at idle and at 2,700 rpm, throttle cable must be held in position by non-human means. If engine rpm increases just a bit when you move the wiper just a tiny bit, you're good. If it increases very noticeably (150-200 rpm) turn the mixture screw down a full turn (now at 3 turns from bottom). Recheck mixture. A slight uptick when you move it CCW is good.
Don't get goofy here, don't get ham-handed. On the road, you have all the time in the world to slowly work the adjustments into the sweet spot.
Test drive and report back.
Colin
Hey Colin,
Well I was going to forget this, put everything back to "O" and continue on this AM.
Then something happened when I was resetting to "O" and Sandy would start, but had no power. Then she stalled and would not stay running at idle, then I saw she had no power under throttle either....
So i had no choice. The only think I messed with was the AFM.
I pulled up this thread on the AFM adjustments :
viewtopic.php?f=50&t=7761
and read through it step by step.
While I dd not complete it all the way through. I moved the Idle Fuel Mixture Screw out 4.5 turns, adjusted the sweeper just as you told us to and then moved the cog counter clockwise.
She started and ran. I check the adjustments as you told us to and made a few more adjustments to the sweeper and cog and then the idle screw. She ran real good so i too off down the road.
Once on the highway she was running at:
36* outside air temp
3400 RPM
-400* Head Temp
65 MPH
She'd climb to just under 450* if I hit a strong and consistent cross wind, but she ran strong and I'm getting 15.16 mpg.
If she holds like this, I'll go over everything again once home next week. But I wanted to just say THANK YOU for your post and let you know it helped me get on the road and running properly again.
So now, what gauge's should I get and where should I mount them?
I currently have the VDO Oil Pressure and Head Temp. I'm thinking I should add a third Oil Temp gauge and switch them all out to non VDO gauges.
