I had the same issue with 2002 pontiac grand am and thought it was the fuel injectors or the transmission fluid or even the spark plugs . I was at my wits end and im not a mechanically uninclined person. I finally broke down and went to a garage and was ready to get stroked. Come to find out it was a 23$ fuel filter. It might be the problem. Try it i thought it was to cheap to work but it did. Hope it helps. Slante' Irish in Ohio
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Re: car won't accelerate
Check transmission fluid it sounds like the transmission is slipping You need to get it serviced asap fluid should be pink and smell sweet if brown or dark n smells burnt you may get away with a filter and fluid change and flush.
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not enough detail
to get an engine to accelerate , the air /fuel mixture is moved to rich in accordance with engine rpms
the more rpms the richer until the peak rpms are reached
( accelerator pump-power valve in carbies and ECM settings according to accelerator position
black exhaust smoke in diesels
so if you press the accelerator slowly then the air/fuel mixture is altered constantly in relation to the pedal setting
If you floor the pedal then it moves to rich and you get black exhaust smoke until the air mixture is again in balance
there is not info to be able to give a definite answer
to work it out
you have top know the diff ratio, wheel tyre circumference to be able to work from rpms of the engine to road speed
However as a pointer, most cars will be around 3200 rpms at 60mph as this will be direct drive and od causes a drop in rpms
Being an automatic find yourself a good section of low traffic road and start from stop slowly increase the rpms and watch the rpms. keeping the accelerator steady you will see when the auto changes by a drop in rpms. slowly increase road sped until you see the next drop in rpms and so on. Over drive normally comes in around 55 mph or around 3000rpms
I would think that it is working because 3500rpms at 75mph is reasonable rpms to be expected. If it wasn't working I would expect the rpms to be around 3800 to 4000.at 75mph
if the vibration increases as you accelerate and change through the gears you could possibly have a universal joint on half shaft that is worn beyond its limits.If it only vibrates as a the motor increases the rpms it could be that your harmonic balancer this damaged all worn out.There is another possibility and that is that you have a damaged tyre that goes out of balance very quickly. Regards
It almost sounds like an electronic problem (i.e. ECU). I don't think it would be a fuse because you wouldn't have anything at all. Sometimes when the instrument cluster starts to act up, you'll get a lot of problems with the engine running. In this situation, I would get the car checked out from a Ford dealer before things get worse.
your car is suffering from a faulty speed sensor. it works by using a signal generator in the transmission that creates an electrical signal in relationship to vehicle speed. This information is processed by the vehicle’s computer for engine and transmission management and provides the signal for the body computer that controls the speedometer. If the speed sensor itself fails then this might be the reason behind your problems. in addition, another cause of this may be that harness my be loose connecting to the transmission or behind the speedometer. there are multiple pins connecting behind the speedometer, and sometimes when one of those pins are not properly connected it gives a problem like yours.