It seems like I've lost all the power to my Nissan. When I get to around 40 MPH my vehicle flatlines and slows down. After approx. 10 seconds it picks back up until is hits around 60 MPH were it does the same thing. I'll hit even hit the gas a bit more and it doesn't make any difference. Any solutions to help my problem would be great.
Fuel pump is not pumping hard enough anymore. Have a mechanic check the pressure. Either pump is bad or the fuels filter is clogged. One other thing that causes this is a clogged Calalytic Converter.
SOURCE: when I take off it sputters, up to 40 to 60 mph it
This could be water in the gas lines or, you may have wire and plug issues as well. I would take this car in for a full scale tune up. make sure they check the distributor points as well. Changing the fuel pump wouldn't hurt at all.
SOURCE: 1975 cj5 jeep starts to shake badly at about 40 mph.
I had the exact same same issue with my 03 sahara at the exact same speed and it was a huge build up of dirt in the rims (live on gravel road)that may be the issue or you may have a badly balanced tire or a bad front end part(s) ball joint tie rod etc......
hope this helps!
SOURCE: my nissan maxima 2000 does not have any power
Change the fuel filter first, but it sounds just like a plugged catalytic converter. You could remove the pre cat O2 sensor and try driving it. It would be very noisy but if it goes better, you know you have a restriction behind it and it's time for a new cat.
SOURCE: my nissan maxima 2000 does not have any power
Check your MAF out. If your revs are slow and you lose power top end it could be faulty.
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The computer in the car should have stored some trouble codes while this problem was occurring.
Best thing to do is take to an autoparts store. Most of them will pull the trouble code from the on-board computer for free.
That way we can find out if something like the speed sensor or something related to the transmission solenoids.
Let me know what you find out.
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