Dieseling - new condition

[rcf925]

7 minutes ago, dlacey said:

try some better fuel?

 

That was my thought, Could be bad fuel

[DavidLMM]

Fuel is OK, on my third tank (2 different Shell, and a Marathon (actual gasoline) since this manifested.

 

So, turns out it was........timing. The PO had painted a nice bright white spot on the flywheel, with a crisp edge. In all honesty, I guess I never really saw the ball, guess I was just sure it was in the field of white.

Reading some of Paul Wegweiser's old posts, and discussions of getting close to timing by ear. I gave the distributor  some rotation, and lo and behold, I saw the ball - in a ragged splotch of dull red. Crap! Reset idle, turned the car off and restarted several times, and now it starts almost just touching the key, and no other histrionics. Thanks, guys, you pointed me in a direction I thought I didn't need to look.

For the record, the distributor is a JFU4  0 231 176 059

 

Oh, and the M3 radiator? My new Behr has two shiny threaded holes in need of some M14 brass plugs that were not included. Drain plug yes, these holes, no. My last two Behrs had undrilled bosses, so this never occurred to me. Maybe tomorrow.

 

Thanks again!

 

David

[jimk]

6 minutes ago, DavidLMM said:

My new Behr has two shiny threaded holes in need of some M14 brass plugs that were not included.

If in the lower tank, you may have a rad for an automatic with a trans cooler.  If no coolant comes out, no plugs needed to operate, only to keep the cooler clean.  If that's the case, rubber plugs would do.

[Clay H002]

Fuel is OK, on my third tank (2 different Shell, and a Marathon (actual gasoline) since this manifested.
 
So, turns out it was........timing. The PO had painted a nice bright white spot on the flywheel, with a crisp edge. In all honesty, I guess I never really saw the ball, guess I was just sure it was in the field of white.
Reading some of Paul Wegweiser's old posts, and discussions of getting close to timing by ear. I gave the distributor  some rotation, and lo and behold, I saw the ball - in a ragged splotch of dull red. Crap! Reset idle, turned the car off and restarted several times, and now it starts almost just touching the key, and no other histrionics. Thanks, guys, you pointed me in a direction I thought I didn't need to look.
For the record, the distributor is a JFU4  0 231 176 059
 
Oh, and the M3 radiator? My new Behr has two shiny threaded holes in need of some M14 brass plugs that were not included. Drain plug yes, these holes, no. My last two Behrs had undrilled bosses, so this never occurred to me. Maybe tomorrow.
 
Thanks again!
 
David

Nice! Good to hear.

Did it turn out to be too advanced or too retarded?

I had installed a 123 distributor and I was too advanced. Drove like crap and I had dieseled. I think I was about 12 degrees too advanced. I just got it dialed in today. Now on to the vac advance.

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[DavidLMM]

(thinking back...)

I think it was too advanced, maybe 10 degrees or so - just a guess. (and I may have it backwards, what with holding the timing light with an elbow while trying to turn the distributor, watch down the hole, and not burn my hand!) What the neat white patch on the flywheel is all about, I may never know. The car is transformed - accelerates better, starts easier, no dieseling. 

[Clay H002]

(thinking back...)
I think it was too advanced, maybe 10 degrees or so - just a guess. (and I may have it backwards, what with holding the timing light with an elbow while trying to turn the distributor, watch down the hole, and not burn my hand!) What the neat white patch on the flywheel is all about, I may never know. The car is transformed - accelerates better, starts easier, no dieseling. 

That's awesome. Glad it was resolved!

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