914 Fuel Injection, Need an L-Jet Guru!! |
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914 Fuel Injection, Need an L-Jet Guru!! |
Cjllong |
Jul 2 2007, 04:11 PM
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#1
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Member Group: Members Posts: 66 Joined: 2-July 07 From: Ukiah Member No.: 7,862 |
I have a 75 914 with a 2.0 motor. It originally had a 1.8L, but I acquired a 2.0 from a wrecked 73 914. When the 2.0 was rebuilt and installed, the mechanic installed the 1.8L fuel injection system and told me it was superior to the 2.0L fuel injection system. I drove the car for 2 years and never had a problem. All of the sudden, the car wouldn't start. I took it to a local German auto mechanic, (The guy who originally did the conversion left town), and he said he would fix it. Well.... A new fuel pump, plugs, other stuff, and the big one.. a new computer, the darn thing still has the same symptoms. It simply dumps fuel into the valves when starting, causing it to flood almost instantly. He checked the fuel pressure regulator and it seems to be fine. He's telling me that the computer is holding the injectors open too long, causing excessive fuel to flood the motor. $1300.00 later, he says he'll do the rest of the diagnosis for free. I think I payed for his education of the 914 fuel injection system, and I don't think he learned anything. I originaly posted this problem on Pelican Parts and they directed me here and told me to look for Clay Perrine. If your out there, please help me! I'm desperate!
Chris |
bd1308 |
Jul 2 2007, 05:01 PM
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#2
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
Check the Air Flow Meter, they get stuck sometimes, especially if you've had some backfiring issues. The vane should be 'closed' when the engine is off.
Another thing is the cold start valve, if that stays open, it'll also dump fuel into the plenum, and subsequently (if it fills enough) into the runners and into your engine. Ive had AFM troubles before on another 914 I worked on, although I did everything for free for another guy, out in the rain--needless to say I didnt work on it for a long time. I would say start with the AFM, they are the most troublesome thing on the L-Jet, the computers 'rarely' ever go out. In one day I converted a 2.0 bus L-Jet system to run on my 1.7L engine. Its a little fat at idle, but it sure does go! |
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