>Jim Hoard wrote: > >> >> 1989 Volkswagen VANAGON 2.1 L >> >> Trans: Standard >> Mileage: 100,960 miles >> VIN: WV2YB0251KH072546 >> >> Symptoms: Hesitation >> Occurs: Cold >> >> ____________________________________________________________ >> >> We have performed all sensor checks and point to point >> engine harness checks i.a.w. Bently manual. We have >> substituted good computer, air flow meter and idle >> stabilizer with no change in results. The vehicle when cold >> has periods of hesitation up to ten seconds in length when >> accelerator pedal is held down. It does not stall but has >> near idle power. It is as if your foot is off the gas. When >> it comes to life it has full power. This event sometimes >> happens several times during warmup. Sometimes it does not >> happen at all. It never hesitates more than a second when >> warm. Fuel pressure is normal during hesitation. Thanks for >> any help. >> The very same thing happens with my '91 Vanagon camper! When it occurs, it's always within the first 5 minutes of a cold start AND generally occurs when accelerating after a stop or after idling in traffic. My belief is that it's somehow caused by a combination of *bad* values from the oxygen sensor AND one of the temperature sensors.
OLTECO Ari Ollikainen P.O. BOX 3688 Networking Technology and Architecture Stanford, CA Ari@OLTECO.com 94309-3688 415.517.3519 |
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