 L-jet running rich |
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| 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: 15,514 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille 
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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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Posts in this topic
Ctrout L-jet running rich Mar 26 2005, 06:09 PM
scott thacher well i know a fair amount about the ljet drove one... Mar 26 2005, 07:15 PM Brando If you've ever adjusted the mixture/richness o... Mar 26 2005, 08:04 PM scott thacher brando i will disagree with you on this dont open ... Mar 26 2005, 08:39 PM Brando I will disagree with us both, Scott, if it makes y... Mar 26 2005, 08:42 PM scott thacher sorry brando but porsche put the screw there for a... Mar 26 2005, 08:47 PM scott thacher okay here is the page from the l jet trouble shoo... Mar 26 2005, 08:56 PM Brando Yes Scott, I understand. The point I was trying to... Mar 26 2005, 09:07 PM scott thacher i would say if he is rich on every cylinder i woul... Mar 26 2005, 09:17 PM Reiche Did you check fuel pressure?
Unlike D-jet, the fu... Mar 26 2005, 09:24 PM Ctrout Thanks for all the replies. I'll go through t... Mar 26 2005, 11:27 PM scott thacher okay the two screws are as follows:
idle screw is... Mar 26 2005, 11:45 PM Reiche Mar 27 2005, 01:07 AM rhodyguy all the yelling aside, this is a great L-jet threa... Mar 27 2005, 10:43 AM scott thacher ... Mar 27 2005, 10:48 AM rhodyguy but it could contribute to a lean condition? the s... Mar 27 2005, 10:58 AM Cap'n Krusty A rich condition, beyond the scope of the idle mix... Mar 27 2005, 11:21 AM rhodyguy the CIS-E from a jetta, golf, etc? i think ed morr... Mar 27 2005, 11:54 AM Mark Henry http://www.914world.com/bbs2/htm... Mar 27 2005, 01:34 PM Cap'n Krusty ... Mar 27 2005, 02:30 PM Reiche I agree with jwalters, but...
I would mess with ... Mar 27 2005, 02:44 PM jwalters Dude--do you know how time consuming it would be t... Mar 27 2005, 05:55 PM Rotten Robby Wow... L Jet sure wakes people up and gets them vo... Mar 27 2005, 06:46 PM Reiche ... Mar 27 2005, 06:52 PM
jwalters Mar 27 2005, 07:08 PM |
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