If anyone has any kind of problem with hesitation around 2700 rpm, running rich, lack of power, having trouble getting hp out of higher rpm's or unstable idle (shaking) READ THIS: My '92 SE was ticking me off with this hesitation problem. I decided to proceed and check ALL the wiring going to the ECU. Not an easy task.
Anyway, I had my car to the dealer about 3 times and they didn't find a thing. I finally checked the grounding (battery to chassis) and the meter read 34 ohms. This should be 0 ohms so I made a jumper out of 8ga amplifier wire and grounded it to the chasiss. I also repaced the braided wire towards the back of the engine grounding it to the firewall. I took the car for a spin and it fixed all the problems I have been having.
To check yours:
Aquire an Ohm meter
Place one probe on the battery’s negative terminal.
Place the other probe to any other unpainted screw on the body of the car.
Make sure resistance is under 2 ohms
Hope this helps! Worked for me and fixed all my problems.
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