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1985 Volkswagen Vanagon 2.0 L

Trans:         Standard
Mileage:       250 miles
VIN:           WV2YB0250FH049006
Fuel:          Bosch AFC Digijet
Ignition:      Electronic
Emissions:     Calif

Symptoms:      Hesitation, Low power
Occurs:        Always, Hot

____________________________________________________________

The problem occurs after a short warmup, usually within 3-4
minutes. It seems to be too lean - has no power and a lean
backfire thru the intake - adding propane smooths it out
and eliminates the backfire but throttle response still
seems a bit slughish.

I have check the Coolant temp sensor, it is 190 ohms @ 200
degs, measured with a raytek at the temp sensor, which is
in spec. I have listen to all 4 injectors with a
stethescope and they sound fine. I have not yet checked
fuel pressure or pulse width.

The problem comes on quickly as it warms up, not gradually.
It also seemed to come-and-go (sometimes worse than others)
during the 15-20 minutes it was idling while checking it.

Any ideas which way to go from here?

Thank you

Robert Grove
moblwrench@aol.com
Owner/Technician
Accurate! AutoWorks
Riverside, California, USA

iATN Business Sponsor
http://www.iatn.net/atn/moblwrench.html

___________________ TEST AND REPAIR DATA ___________________

EXHAUST GAS READINGS (Idle)

CO  = 2.0%
HC  = 110 ppm

RELATED REPAIR HISTORY

Recently rebuilt engine, has rebuilt airflow meter and new
coolant temp sensor

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