lack of power

Mar 13th, 2003, 01:47 PM

Hi I have a couple of problems with my 87 maxima.
1. Any idea why it picks up power when it is low in gas (<1/2 full tank)?
2. I once went out of gas without getting a fuel warning sign or voice?
3. Why it cann't speed more than 90 miles/h and the RPM hardly goes above 3000?
I don't see any codes from the computer. Changed the sparplugs, fuel filter, air filter and timing adjusted.
Thank you for the input.

James · Mar 13th, 2003, 01:49 PM

Well you have less weight when you're low on gas...

Mar 13th, 2003, 02:14 PM

No. It does it with or without heavy load. Even when it is low in gas having extra weight (two or three people) doesn't make any difference.

James · Mar 13th, 2003, 02:15 PM

let me clarify, it picks up power when you have low amount of gas (your question #1) because you're not as heavy...

Mar 13th, 2003, 02:32 PM

Yes. what I am wondering is a full tank (~60 L) weighs about 132 lb. So have another person or equivalent load should make a difference on the performance if the amount (weight) of gas matters. Instead I am wondering if the change in vapour pressure associated with change in volume of gas in the tank has any impact on the performance of the car.

Ruben · Mar 14th, 2003, 01:30 PM

Can you clarify your problems? I'm not sure I understand your questions...