Sot 912E #483, Carbs? |
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Sot 912E #483, Carbs? |
BK911 |
Sep 15 2017, 06:19 PM
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#1
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Senior Member Group: Members Posts: 672 Joined: 19-February 04 From: Rocky Top, TN Member No.: 1,674 Region Association: None |
Ok guys, not sure what to do.
Recent acquisition of a '76 912E #483. As most of you know, it is powered by a 914 2.0 with Ljet induction. Motor runs well, but idles high and runs warmer than expected, so I am thinking vacuum leak. Of course will go through ignition first, since 90% of FI problems are ignition. (IMG:style_emoticons/default/smile.gif) Chased FI problems on my 1.7 djet for a couple years before I gave up and put on some EMPIs. Been running awesome for years now! So.... Thinking of spending a couple of hours tuning the ljet and replacing all vac lines, but also thinking of just taking the plunge and putting on some EMPIs. Thoughts ? Don't care about resale; car is going in dd rotation and will get DRIVEN!! |
BK911 |
Sep 18 2017, 10:00 AM
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#2
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Senior Member Group: Members Posts: 672 Joined: 19-February 04 From: Rocky Top, TN Member No.: 1,674 Region Association: None |
Ok smart guys, hit a bump I've never seen before.
Checked dwell and it was a little low at 42^. Checked timing and it was 50^ btdc at idle! At 3500 rpm it was off the chart! Car runs pretty well, except runs a little hotter than I expected. How is this possible? I didn't adjust yet, waiting for the electronic ignition to arrive first. |
Morrie |
Sep 18 2017, 11:02 AM
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#3
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Member Group: Members Posts: 181 Joined: 8-October 07 From: Cedar Park, Texas Member No.: 8,198 Region Association: Southwest Region |
Ok smart guys, hit a bump I've never seen before. Checked dwell and it was a little low at 42^. Checked timing and it was 50^ btdc at idle! At 3500 rpm it was off the chart! Car runs pretty well, except runs a little hotter than I expected. How is this possible? I didn't adjust yet, waiting for the electronic ignition to arrive first. (not a very smart guy, but let me try and suggest something. It's a straw man suggestion, so others can feel free to knock it down) Is it possible you got on the wrong plug wire, or are looking at an incorrect mark on the fan? You may want to consider doing a TDC on #1 sanity check... Lots of ways to do it I am sure.... here is what I teach folks when they get mixed up adjusting valves..... 1) pull spark plug for #1 cylinder. 2) pull 1-2 valve cover. 3) pull distributor cap You are looking for the following to all line up. (from memory) 1) rotor is pointing to the distributor cap tower going to spark plug for #1 cylinder. 2) #1 piston is at top dead center. I usually use a wooden dowel for this so you can visually see it go up and down. Just make sure it is plenty long so it doesn't drop inside the combustion chamber. 3) With both 1 and 2 above met, you should be able to spin the pushrods freely for both the intake and exhaust valves on cylinder #1. Once you have all these criteria met, you can look for your timing mark. If I remember correctly, various fans had different marks on them, and it is hard to guess if yours is the original fan after all these years. Remember, the 912E has the engine serial number stamped on the fan shroud instead of the case. If yours has a number stamped on the case, likely its a 914 motor replaced at some point. Kind regards, |
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