No acceleration power

Tiny
BIGPIDG
  • MEMBER
  • 2003 VOLKSWAGEN BEETLE
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 1,000,000 MILES
Replace master flow sensor, crank shaft position sensor, checked camshaft, position sensor. Really don’t think it’s throttle response sensor. Just replace water pump, timing belt, replaced head gasket, clean throttle body, checked air filter, checked all vacuum hoses. Still questioning throttle booster, but symptoms seem too severe. PCV valve not clogged. Not a fuel issue as in fuel filter fuel pump, not spark plugs wires, or cap. Yes, I have plenty of gas in it. My e-brake is not on. The problem is that I have zero acceleration power. Not an exaggeration, no power have to push it up and down the street if I want to move. It starts up okay, runs a little rough, but nothing horrible. If gas pedal is to the floor it slowly reaches up to three grand where is maxed out and then fluctuates between one and two grand until they release the gas pedal where it again idles pretty fine for the most part. Occasionally bogging way down but really shuts off. Diagnostic codes read I believe P0337, but not positive. That was one either way it says crankshaft positioning sensor Bank one performance. But sensors are the problem every time. I replace a sensor another one pops up. But I can’t seem to find which triggering them. Ran out of cash to put into it. I don’t know anybody to ask. YouTube has been exhausted hopefully you can tell me something other than whatever you checked. Please try to think a little bit outside your normal Volkswagen issues. Give me some sort of direction only thing I have left is to see if the timing belt slipped a notch and then I might possibly light it on fire and push it down the street but not in that order.
Tuesday, March 26th, 2019 AT 5:43 AM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

This could be a problem with the throttle, throttle bore, and the Throttle Position Sensor (TPS). What happens is your throttle and throttle body pick up this black sludge from moving a lot of air over time. This sludge then interferes with the throttle and the TPS. The Power-train Control Module (PCM) not getting a clear signal will then go into "limp mode" so the engine doesn't go lean and blow up. It gives the driver just enough power to take it to a shop and get it fixed.
I have included a link down below for you to go to.

https://www.2carpros.com/articles/throttle-actuator-service

Please go through this guide and get back to us with what you find out. If it was dirty then we will get you instructions to reset your transmission and get you out of "limp mode", if not we will also go from there.

Thanks,
Alex
2CarPros
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Tuesday, March 26th, 2019 AT 9:34 AM

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