Engine, Fuel or FI problems, spitting and sputtering again |
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Engine, Fuel or FI problems, spitting and sputtering again |
malcolm2 |
Mar 16 2016, 03:39 PM
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#1
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Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
75 1911cc with L-jet.
back in January I made this post: http://www.914world.com/bbs2/index.php?s=&...t&p=2286395 I have been driving quite a bit since then, even took a 6 hour round trip day ride to Knoxville. My guess it 4 or 5 tanks or about 1800 miles and no issues. Same thing happened today... Driving home from work on the interstate, MPH at 80, revs about 3400. Again, going up a long low hill, not far from my exit. I could feel some spitting and sputtering. The VDO CHT ring under #3 started heading down. Dropped to 200*F. When I exited and took my foot off the gas, it died. Started right up and I made it home braking with my big toe and gassing with my little toe. This time, I have a 1/2 a tank of e10 gas (not positive on that). So it is not running empty as hoped last time. Fuel pressure was at 40 on the engine bay gauge. Other suggestions last time were the filter. I am going to remove that today. With the #3 temp as it is, I might should start there. I will try my induct timing gun on it to see about spark. Need a noid light for the injector. and i'll take a look at the plug. I'll remove the disty and take a look. But #3 seems to not be firing and generating heat. I'll update, but any other ideas? Thanks, Clark |
r_towle |
Mar 16 2016, 05:10 PM
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#2
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Custom Member Group: Members Posts: 24,591 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
sounds like it flooded, temp going down too fast, sputtering.
See if there are tests for the AFM on Ljet. Link up top, right side, 914 info, other sites. There is an ljet site to help you diagnose it. Wiring may be at fault, or the AFM may be faulty. Rich |
malcolm2 |
Mar 16 2016, 05:18 PM
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#3
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Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
sounds like it flooded, temp going down too fast, sputtering. See if there are tests for the AFM on Ljet. Link up top, right side, 914 info, other sites. There is an ljet site to help you diagnose it. Wiring may be at fault, or the AFM may be faulty. Rich I will read up. I have not heard of FI ever being flooded. As mentioned, 1 common denominator is the speed. I rarely take her up to 80. Really it is actually 75 via a phone app. So you might have something. |
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