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Re: [T3] Only Running on Two


On 1 Nov 2005 at 22:27, Randy Hougham wrote:

> I need help. I'm stumped. My car is only running on the right two cylinders. 
> When it's idling, it's rough and at low speed, the exhaust sounds poppy and 
> gurgley, yet the car has plenty of power and can do 80 mph. All the 
> injectors are clicking, I have spark, my spark plugs are nice and brown, but 
> it smells like it's running really rich. I don't know if this has anything 
> to do with it, but the other day the car was dripping fuel from the bottom 
> right side of the engine. I started it up and moved it and the drip seemed 
> to stop. Today I took it to an oil change guy, had the oil changed, and 
> asked him to fix any fuel leaks if he could find them, not sure if he 
> accidentally knocked a wire off or something. Any ideas?

> '71 Squareback 

If it will do 80 mph, then all 4 cylinders are firing, at least at speed. this 
makes me think that it's just over rich at idle and not running well there.

Check these 2 things:

1) Make sure that the manifold pressure sensor hose is attached at both ends. 
If this falls, or gets bumped, off then it will make things very rich.

2) If that hose is okay, get a voltmeter and check the voltage between ground 
and the generator output post (marked B+) with the engine running at medium 
rpm. It should be above 14 V. If it is low, replace the voltage regulator with 
a Bosch 30-019. Low system voltage makes the D-Jetronic FI run rich.

-- 
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054
USA

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