1989 Buick Century Custom bogs down when accelerating?

I changed the fuel filter, air filter, plugs, plug wires, Distributorless system, changed the coil, changed the tranny filter and fluid. Still bogs down when pressing the accelerator, Idles fine once started, but can take a bit to get it started. Any Ideas out there?1989 Buick Century Custom bogs down when accelerating?You seem to know a good bit, so I'm going to throw some advanced ideas your way (as well as a few other simple ones).



1) Check the throttle cable tension.

2) Change the O2 sensors.

3) Change the MAF sensor.

4) Check fuel pressure (bad pump).

5) Change the fuel injectors.

6) Check throttle body operation.

7) Have the catalytic converter replaced.

8) Run a compression test.

9) Change the ECU.1989 Buick Century Custom bogs down when accelerating?Check the fuel pressure with a fuel pressure gauge.



My bet...low fuel pressure,bad fuel pump.1989 Buick Century Custom bogs down when accelerating?REPLACE THE I.A.C.MOTOR. THE IAC.MOTOR STANDS FOR IDLE AIR CONTROL. WHEN YOU STEP ON THE GAS, THIS VALVE CLOSES, SLIGHTLY TO GIVE THE ENGINE MORE INRICHMENT, OR MORE POWER. THIS VALVE ALSO, AT COLD MORNING STARTS, ACT AS THE OLD BUTTERFLY, ON A CARB. ENGINE. IT SHUTS OFF ALL THE OUTSIDE AIR, AND GOES FULL INRICHMENT, FOR QUICK START UP. CHANGE THE I.A.C., AND YOU WILL HAVE YOUR BRAND NEW 89, BACK. GOOD LUCK BUD!!!!1989 Buick Century Custom bogs down when accelerating?
If its a 3.3L, there a 2 big things to check. First fuel pressure. Key on engine off spec if 40 -47 Psi. Second, the IAC could be a concern. Had one happen to me, held the gas to the floor just to bring the engine to any RPM.

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