RESUME: 100Q engine problems

[Tony Hoffman]

The firsts thing I'd do is check the compression.
Then, find out why the vacuum is low.

Tony Hoffman

--- denis <sparkplugvw at hotmail.com> wrote:

> Car: Audi 100Q 1989
> 
> Engine: 2.3 NA CSI-3
> 
> symptoms:
> 
> - Hard starting hot and cold, starting as a big lazy
> cow.
> 
> - Lower power; cant pass other cars on the roads. If
> i push the accelerator more than the half the engine
> slow down instead of accelerate. I must let the
> engine take breath before push more on the
> accelerator. The sparkplugs look white and gray
> since the engine is going bad.
> 
> -Bad fuel economy
> 
> -The piston swim in fuel if i miss the first start
> on cold weather.
> 
> -Now the car is stalled 350km form home at -25C
> 
> I did:
> 
> -Installed a check engine light:Very useful.
> 
> -I Retrivied the fault codes: knock sensor only ;
> cleaned the sensor connector, was oxidated.
> 
> -Reset the fault code and checked for others . None
> since i fixed the knock sensor.
> 
> -Did output check with the check engine
> light;everythings ok.
> 
> -I changed the DPR connector and cleaned it, since
> that day the car ran powerful and good fuel economy
> for 2 weeks,,,, then back to a big lazy car...
> 
> -The fuel pump is 1 years old, i did not check the
> delivery rate. (Pressure dropped to 4.3this week.)I
> took the fuel pump from my ex-5000TQ 87 and was
> running very good before i removed. I should have
> took all the inject system from that car :-(.
> 
> -Checked the fuel filter on the fuel pump;ok
> 
> -Checked fuel lines:ok;They all been changed last
> summer 2004.
> 
> -Changed fuel filter close to the fuel
> distributor.17 dec 2004
> 
> -Checked fuel system pressure;4.5 bar and 67 psi
> with another meter.Dropped to 4.3 this week. System
> pressure drop immediately to 20psi when the engine
> stop. The pressure then drop slowly to 5 psi and
> stay there for maybe 5 hours.
> 
> -Just changed sparkplugs
> 
> -Try other sparkplugs wires;Beru. Checked on the
> dark if i can see any sparks come out the wires and
> distr. cap.OK
> 
> -Checked the vacuum: 9psi. suppose to be around 20.
> The only leak i found is one injector insert.
> 
> -I removed all the injectors and clean around, put
> silicon around them and putted them back. The stores
> were closed that time, it s why i did that.
> 
> -Removed the DPR and cleaned it.
> 
> -Just changed oil :castrol synthec 5W30. Cause the
> car was swimming is fuel;after lot of starts and wet
> cylinders
> 
> 
> -Checked the current on the DPR. Bentley
> procedure.:ok.
> 
> -Checked the ISV with 12v charger and output tes
> procedure:ok. But when i plug the wires to the ISV
> the 12 V drop to 0volts
> 
> Note: The engine seems to start when someone is
> starting while i m pushing the distr plate with my
> hand !!!!
> 
> Any comments welcome.
> 
> 
> 
> My spelling checked
> at:http://chxo.com/scripts/spellcheck.php
> 
> _______________________________________________
> quattro mailing list
> quattro at audifans.com
> http://www.audifans.com/mailman/listinfo/quattro
> 



		
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