Re: [DML] Fuel pressure and depressing the air metering plate
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Re: [DML] Fuel pressure and depressing the air metering plate




With the engine hot, there will be quite a considerable resistance, but 
I have recently seen a car where thep lunger was too tight in the 
metering head and this cause excessive leaning of the mixture over the 
rev-range.  Based on what you've said, I'd recommend taking the head 
off, pulling th eplunger, cleaning it and the "hole" and making sure it 
slides up and down with almost no resistance. A quick check will be that 
when you take the head off, the plunger tries to fall out. If it 
doesn't, there's your problem.

Martin

Matt Spittle wrote:

>Forgot to add something to my last message.  When my car's fuel 
>system is fully pressurized, it takes about 3 to 5 lbs of force to 
>depress the air metering plate.  Is it supposed to be like this?  It 
>has always been that way since I purchased the car.  When the fuel 
>system isn't pressurized (i.e., if the fuel lines were just hooked 
>back up and the fuel pump hasn't run yet), then the air metering 
>plate is very easy to depress.  





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