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spfi slight hesitation problem


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If you punch it with the spfi it will hesitate for maybe a second and then rev up, it will also hesitate slightly at low rpm under load. The check engine light flashes. However there is a green connector in the engine bay right in the top corner by the strut, which stops the check engine light, but causes the engine to hesitate a bit more severely, and idle a bit lower. Any ideas?

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My '88 DL Wagon did the same thing, EA82 SPFI, w/220K miles. I checked the TPS (Throttle Position Sensor) for a dead spot, but nothing major, just a small dropoff in resistance when just starting accealeration. Eventually did a compression check & found #3 cylinder with only about 65psi. All others around 150psi. Replaced both hydraulic lifters on that cylinder & much better now. Also, gas mileage was fluctuating & dropping radically before, but now getting 27 - 30 mpg consistently.

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