Elecrical issue / Bogging Issue

[GaMBiTx]

Hi NicoClub members,

I have an electrical issue with my 89 sohc hatchback.When idling, if i press the brake pedal, the dash lights would dim slightly, and i would also hear the fuel pump change its tone (a bit noisy (Autozone Pump)) and i would get some hesistation (idle fluctuates) a bit and sometimes it would correct itself...If i let go of the brake , the lights would get a bit brighter. Also rear defogger does not work)

Also when i'm driving on the highway, at cruising speeds, i would get hesitation and some bogging, but would not feel it if i go full throttle.When driving local streets at around 2nd gear 1200 to 2200 rpms, sometimes i would have that some bog and jerk.

I have changed spark plugs, o2 sensor, plug wires, distrib & cap. Checked the TPS, changed the negative terminal cables (connecting batt to engine)

Please suggest any solutions/ideas to fix these issues similar to this one (of if you had similar experiences) Thank you all!

[sx moneypit]

You may have an alternator issue.If the alternator is not charging properly you can have all sorts of driveability problems.

[tsardinas]

If its not an alternator issue..95% sure.it might be the fuel pump and or the fuel filter..

Had this issue with my 96 nissan maxima.