VW jetta 99 2.0 L Still cutting off after replacing gas pump, gas filter and Sensor Crank (PC502T). Seems better but still shutting off... After erasing previous codes now getting codes PO 725, P1850 and P1857. getting frustrated.. thanks 4 helping.....
i had a few of these pop up. The PCM and the ECM had a brain fart. Have the codes cleared and if you have the same luck as me all will be back to normal. That was the fix...
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Try this. Find the ambient temperature sensor. The one that reads the outside air temperature. Put an ice pack around it and try turning it back on and hot the accelerator. The sensors are usually around the front of the vehicle.
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P0304 Cylinder No 4 is misfiring (Spark Plug) P1240 means you have a Fuel Injector problem on Cylinder No4 - Open Circuit, Check the plug on the injector
P0725 Engine Speed RPM Sensor mat be faulty
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the fuel system needs to have the air bled out!
Crank it over & release injectors pipes one at a time so it can pump fuel through
[ just enough like a leak ]
this will bleed out all the air!
Cheers Rob.
If you vehicle is hesitating like it is not getting gas and then takes off like it just got gas then you might want to try replacing your air filter first, because is your air filter is dirty than you might not be getting the oxygen you need to run smooth, this will also give you better gas milage. If it is still doing this than you might want to replace the fuel filter it could also be dirty, you may be getting more than gas at the station. Unless you have the professional tools to remove and replace the filter, you might consider paying a VW place to do it for about $99 that is parts & labor. All auto mechanics are not the same.
Good Luck, mitchell in Houston
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