Golf 3 1.4 - rpm drop
Year 1992, petrol.
Car has two faults, related or not.
1) Sometimes no start
2) Rpm drop occasionaly in this situation:
a* Shifting from 2nd to 3rd gear, also 3rd to 4th
b* Entering a roundabout or at the center of the roundabout or in some curve,
with or without braking
Parts that has been changed with new spare that don't solve the problem:
- crank position sensor
- fuel filter
- 70° corner pipe in vacuum line
Parts that has been changed with USED spare that don't solve the problem:
- idle motor in throttle body
- idle control valve
Parts that has been changed months ago:
- new fuel pump (April 2017)
- new ignition switch (August 2015)
- new throttle body gasket (June 2013)
- new water temperature sensor (April 2015)
If engine no start there are two rapid solution:
- keep cranking and press accelerator pedal half way, in a few seconds engine will start, and stay on.
- key in off position then crank again.
If engine engine drop rpm while driving:
- engine will solve the problem in 2 seconds, driver have to do nothing.
Only one time engine shut off very quitely while downshifting.
Suspect of internally broken central exhaust silencer that sometimes clog the engine.
All other driving condition are good: overtake, rapid acceleration, etc.
Please suggest other thing to do.
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