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914World.com _ 914World Garage _ L-Jet problem

Posted by: 914nerd Aug 23 2006, 02:31 PM

I have a '75 1.8 that is running the original L-Jet fuel injection system
On occasion, when I come off of fairly hard throttle, the engine drops down in rpms to below the idle speed and almost stalls out
I have only actually had it stall out once or twice this way, but I feel that it is better to fix the problem now than wait for it to become (potentially) a real problem
I would appreciate people's advice as to where to begin with fixing this problem.
Thanks,
Charles

Posted by: bd1308 Aug 23 2006, 02:33 PM

You're missing a piece arent you??

Looks like a covered dish with two pipe fittings on it?

In other words, you need a deceleration valve.

I had EXACTLY what you describe, and the fix came in this form.

b

Posted by: mnementh Aug 31 2006, 06:37 PM

Charles,
I had a similar problem as well. I took the air flow meter off the car, and lubricated the pivot points of the flap inside the box. Mine was sticking, especially on the return, and that took care of the problem.

Posted by: jim_hoyland Aug 31 2006, 08:20 PM

1.8 L jet has several parts that cause prblems. As Britt said, decel valve could be one.

After messing with my L-jet for the past 20+ years, I've found you have to get a vacuume reference point.

I've installed a vacuum gauge in the engine compartment and just spliced it into one ont he smaller hoses with a T.

Now, every time I make a change, I can see how it affect the vacuum. The other thing I did was to install a fuel pressure gauge, but this is not as helpful as the vac gauge.

Perhaps some others has thoughts on this too.

Posted by: bd1308 Aug 31 2006, 11:05 PM

The decel valve will prevent the stalling out when pushing in clutch on the highway.

The decel valve should fix your problem not add to it

Check timing and idle when hot too.

Timing is the big thing.

b