1973 I6 165hp timing ? to correct misfire/stumble

[gendent]

So that is the motor. I have seen timing listed anywhere from 6-10 degrees btdc, so which is correct? I have a problem with it "stumbling" and occasionally backfiring when accelerating from idle. The setup is all stock. I took the distributor apart and cleaned the entire assembly and freed the centrifugal weights which were solidly corroded, then retimed it at both 6 and 8 degrees btdc several times without success correcting the problem. Suggestions on further steps?

Thanks for the help,

Jim

 

[Bondo]

Re: 1973 I6 165hp timing ? to correct misfire/stumble

So that is the motor. I have seen timing listed anywhere from 6-10 degrees btdc, so which is correct? I have a problem with it "stumbling" and occasionally backfiring when accelerating from idle. The setup is all stock. I took the distributor apart and cleaned the entire assembly and freed the centrifugal weights which were solidly corroded, then retimed it at both 6 and 8 degrees btdc several times without success correcting the problem. Suggestions on further steps?

Thanks for the help,

Jim

Ayuh,.... My guess is, ya got a Carb issue causin' the Problem,...

That motor oughta run just fine at 6? or 8?....

 

[NHGuy]

Re: 1973 I6 165hp timing ? to correct misfire/stumble

I'd accelerate the motor with the light on it to see if the advance is working.

 

[gendent]

Re: 1973 I6 165hp timing ? to correct misfire/stumble

I will try the light and advance tonight, but I seem to recall I may have done that, but I'll try again. If advance is good I will look to the carb. In that respect, anything in particular I should look at/correct?

Thanks

 

[gendent]

Re: 1973 I6 165hp timing ? to correct misfire/stumble

In response to the advance working, I hooked up the timing light and it does advance smoothly with increased rpms. So if it is the carb, what should I be looking for/at. Should I just get a rebuild kit or does this take some skill an knowledge from a shop?

 

[Don S]

Re: 1973 I6 165hp timing ? to correct misfire/stumble

Carb probably needs a rebuild in order to clean all the passages, and to reset everything and replace the accelerator pump.

When was the last tuneup? Still have points? Are you getting good fire to all the plugs. (not yellow spark either)