L-jet running rich |
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L-jet running rich |
Ctrout |
Mar 26 2005, 06:09 PM
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#1
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Member Group: Members Posts: 377 Joined: 20-May 04 From: Mountain Home, ID. Member No.: 2,091 |
I know that everyone here has D-jet but does anyone know of any L-jet gurus anywhere? My car has smelled like it runs rich since I got it. While doing some exhaust work this morning, it was confirmed by the black soot everywhere. I thought I read somewhere that these cars ran rich from the showroom floor. I have backed the idle adjust all the way out with no apparent change in the richness of the mixture. It did change the RPM to a point though. I read in one thread something about coming in from working on the car and smelling like I had been standing next to a diesel campfire. That's me!
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ClayPerrine |
Mar 27 2005, 10:30 AM
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#2
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Life's been good to me so far..... Group: Admin Posts: 15,820 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
I agree with the statement .... DO NOT OPEN THE AIR FLOW METER!
I have worked on L-Jet cars for 20 years. The spring tension is calibrated to the displacement and Volumetric Effeciency of the motor. Opening it and adjusting the tenision can cause your car to go to full fuel enrichment way too soon or way too late. Both can be VERY bad for the motor. And the only way to get them back to proper calibration is with a special calibration tool and meter. I have seen most of the replacement AFM units for the L-Jet 914s are the wrong unit. They substitute or supercede the part number for the 914 with the one for the Beetle with L-Jet. It's not calibrated right, and it won't run right. Because the Beetle is a 1800 type-1 and the 914 is a 1800 type 4 does not make them interchangable. The Beetle AFM on a 914 will run, and it will run rich because the spring tension for the Beetle AFM is lighter than the 914. The design of the L-jet system will cause it to go lean if there are any vacuum leaks, so that isn't it. Check all the injectors for leaks, especially the cold start injectior. Then check the fuel pressure with an accurate gauge. If the pressure is too high from a restriction in the return line or a bad regulator, it will run rich. Also, if the pressure regulator blows the internal diaphram, it will feed raw gas into the intake via the vacuum line. Pull the line from the regulator and see if there is gas inside. |
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