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VW Jetta check engine issues

Tiny
EVVWJETTA
  • MEMBER
  • 2001 VOLKSWAGEN JETTA
  • 4 CYL
  • FWD
  • MANUAL
  • 139,000 MILES
I just spent almost 4K USD fixing my 01 VW jetta 1.8t and the check engine light still comes on and now it takes excessive time for engine to register temp on temp gauge and heat is unusually lower temp now/doesn't heat up all the way after driving 20 miles.

replaced:
breather hoses
MAF sensor
O2 sensor
4 ignition coils
4 sparkplugs
cam gasket
timing belt
thermostat
coolant temp sensor

What else could be the problem?
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Thursday, February 3rd, 2011 AT 11:29 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,650 POSTS
If you are having a heat issue and the engine won't heat up, make sure they used at least a 195 degree thermostat. Next, with the engine warm, running, and the heat on, feel both heater core hoses. Both should be hot. If one is hot and the other isn't, flush the heater core. If both are hot, check the blend door.
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Friday, February 25th, 2011 AT 2:23 AM

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