Hello,
for some time now I have had an increasing problem with the audi a6 c5 2.4 lpg from 98.
After the overnight stop, the car ignites for 3-4 seconds of spinning for 3-4 seconds and goes into very low speed, when I add gas, it immediately goes out, on the next attempt to start it starts immediately and goes to 1200 rpm working steadily, when you try to move it chokes you have to wait about a minute, you can go later, but the car chokes when you try to drive more dynamically (you know the cold engine, so this "dynamic" driving with your head) when the car switches to gas at 30 degrees, it works normally, it has power and drives normally, switching takes place after passing about a kilometer.
when the car is warm on petrol, it works perfectly, has power, even above 3,000 rpm. works evenly and linearly over the entire rotational range.
The car does not show any errors after connecting to the vag, except for lambda probe errors (occasional error mixture too rich or too poor) but it has been possible to say since I bought it over a year ago. I replaced the probes with dedicated Bosch.
For some time I also noticed the hissing from the tank at the fuel filler
so far I have checked:
-I disconnected the clamp for 1 hour.
-I checked the temperature sensor and intake air sensor readings in Vagu: group 4, column 3 and 4, the indications almost differ by 3 degrees.
-I turned off the gas supply, burned off the gas that remained in the pipes and unplugged the vacuum regulator for the night, leaving the hose loose
- I replaced the fuel filter under the chassis
I disconnected the ankle from the evap valve - hissing from the tank, there was an error of this valve in the vagu, but it did not affect the ignition in any way the next day.
I removed the fuel pump. I put it in a 0.25l jar with gasoline in an open area and connected it to the rectifier, measured the pressure it gives - it came out 3 bar. I do not know if the pressure is not too low, because some sources say that it must be 4 bars, and here it is supposed to be directly supplied from the rectifier and gives "only" 3 bars.
I always have fuel in the tank at 1/4 as soon as the reserve lights up, I add it.
I do not know if it is the fuel pump that can cause such difficulties with starting and such bad work when the engine is still cold or is it some other fault?
for some time now I have had an increasing problem with the audi a6 c5 2.4 lpg from 98.
After the overnight stop, the car ignites for 3-4 seconds of spinning for 3-4 seconds and goes into very low speed, when I add gas, it immediately goes out, on the next attempt to start it starts immediately and goes to 1200 rpm working steadily, when you try to move it chokes you have to wait about a minute, you can go later, but the car chokes when you try to drive more dynamically (you know the cold engine, so this "dynamic" driving with your head) when the car switches to gas at 30 degrees, it works normally, it has power and drives normally, switching takes place after passing about a kilometer.
when the car is warm on petrol, it works perfectly, has power, even above 3,000 rpm. works evenly and linearly over the entire rotational range.
The car does not show any errors after connecting to the vag, except for lambda probe errors (occasional error mixture too rich or too poor) but it has been possible to say since I bought it over a year ago. I replaced the probes with dedicated Bosch.
For some time I also noticed the hissing from the tank at the fuel filler
so far I have checked:
-I disconnected the clamp for 1 hour.
-I checked the temperature sensor and intake air sensor readings in Vagu: group 4, column 3 and 4, the indications almost differ by 3 degrees.
-I turned off the gas supply, burned off the gas that remained in the pipes and unplugged the vacuum regulator for the night, leaving the hose loose
- I replaced the fuel filter under the chassis
I disconnected the ankle from the evap valve - hissing from the tank, there was an error of this valve in the vagu, but it did not affect the ignition in any way the next day.
I removed the fuel pump. I put it in a 0.25l jar with gasoline in an open area and connected it to the rectifier, measured the pressure it gives - it came out 3 bar. I do not know if the pressure is not too low, because some sources say that it must be 4 bars, and here it is supposed to be directly supplied from the rectifier and gives "only" 3 bars.
I always have fuel in the tank at 1/4 as soon as the reserve lights up, I add it.
I do not know if it is the fuel pump that can cause such difficulties with starting and such bad work when the engine is still cold or is it some other fault?
