Question about 1987 Nissan Maxima
My 1987 Maxima is surging under acceleration. If I push donw on the gas pedal it feels like the car is holding back, when I let off the throttle it feels like power is back. All sensors are original except the O2 which was changed last year for smog. I recently had another smog check and the car passed no problem.
Sounds like the engine is being restricted by something. Here's the three basic things an engine requires to run correctly. Spark, fuel, and air. So, in this situation, I'd definitely recommend that you check the air filter. If the air filter is dirty and restricting airflow, the engine will actually hesitate under full throttle as it isn't able to get the right amount of air to make the correct fuel to air mixture.
If this isn't the problem, then I'd check into fuel delivery. First things first would be a fuel filter. This can have a serious impact on the performance at full throttle. If the filter isn't letting enough fuel into the engine, then it's not going to be able to run correctly at full throttle.
Try those two first, if they don't seem to make a difference, I'd then check into the mass airflow sensor, and possibly the fuel pump/fuel delivery (fuel injectors or carbuerator). Something is definitely restricting that engine, and I'd find out what it is.
Posted on Sep 10, 2008
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