289 runs good 2 hours later runs like crap

D

David A

Member

Sep 20, 2018

80

5

18

Beaufort, SC

Jul 11, 2019

#1

• Jul 11, 2019

• #1

Another problem with the 289. I found the timing chain had some slop so I replaced it thinking that was the problem. Wrong. I’m thinking there is a problem with the distributor. It’s really frustrating when it runs fine one minute but let it cool off a couple hours and it runs really bad. Anyone have any ideas ?

 

rbohm

Founding Member

Apr 12, 2002

6,698

550

204

tucson,az

Jul 12, 2019

#2

• Jul 12, 2019

• #2

sounds like fuel delivery issue to me.

 

D

David A

Member

Sep 20, 2018

80

5

18

Beaufort, SC

Jul 12, 2019

#3

• Jul 12, 2019

• #3

The motor seems to rev up ok. It just won’t idle unless the timing is advanced about 20 deg and I know that’s not right. When I take the the distributor out I noticed I can turn the shaft back and forth a little while holding the bottom gear. Either that or I didn’t get the timing chain sprockets just right.

 

rbohm

Founding Member

Apr 12, 2002

6,698

550

204

tucson,az

Jul 12, 2019

#4

• Jul 12, 2019

• #4

David A said:

The motor seems to rev up ok. It just won’t idle unless the timing is advanced about 20 deg and I know that’s not right. When I take the the distributor out I noticed I can turn the shaft back and forth a little while holding the bottom gear. Either that or I didn’t get the timing chain sprockets just right.

Click to expand...

another possibility is the balancer ring has slipped

 

D

David A

Member

Sep 20, 2018

80

5

18

Beaufort, SC

Jul 12, 2019

#5

• Jul 12, 2019

• #5

Did I mention that I installed a new balancer also as well as a new timing chain? I think I’ll just tear the timing chain cover off and recheck if the dots on the sprockets line up. I also adjusted the rockers. Maybe I got them too tight?