Q: When i put my Car in drive or reverse i lose power but in park or netural the voltage is normal

asked by on January 22, 2017

I have Replaced my Alternator , My Battery , My Throttle Body and the Alternator Plug and my Belt just in case it was Slipping and my Battery light still comes on. I have recently took the car to have the Alternator tested and the battery tested and they are good, My Check Engine light Recently came on and i have a air flow leak which i have yet to find. When the car is in Park or in Neutral the voltage is strong but when the car is in Drive or Reverse the Voltage drops, I have replaced everything i Know Could u Give me the next Step or some advice Please

My car has 192000 miles.
My car has an automatic transmission.

Alternator Replacement $149.30 - $1391.75 Get a Quote

Hello there, many faults will cause your battery light to be on when your 2005 Ford Crown Victoria is in drive or reverse. You have done well in replacing parts so far, but the vehicle must be diagnosed fully before any more parts are replaced. When an air leak is present it can cause the idle to fluctuate, if the idle is to low this can cause alternator output to decrease. Other likely issues are a wiring harness issue, battery cable, or the alternator fuse. A qualified Technician such as one from YourMechanic will be able to diagnose your low alternator output and make any repairs required.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

Take off alternator install - 1992 Plymouth Acclaim V6

Hi there, thanks for your question. These procedures are vehicle specific as they are not all assembled the exact same way. Basically, you want to disconnect the battery before doing anything else. To do this, loosen the belt tension and...

How do you disable the auto lock mechanism on a Ford Explorer 'LIMITED'?

Hi there. The following steps are how to disable the auto lock feature in your vehicle. Confirm that the vehicle alarm is disarmed. Close all the doors. Make sure that the ignition switch is in the 'OFF' position. Turn...

clicking sound in rear on the passenger side of car while driving

A ticking noise may be from the brakes or a tire has something in it. If the noise goes away when pressing on brakes then it is a brake problem. If noise only happens when pressing on brakes when moving...

My car shakes when I accelerate, but stops once I let off the gas.

Hi there. Typically when you accelerate and the engine or steering wheel is vibrating, it's due to motor or engine mounts being worn out. During acceleration, the motor mounts the engine vibrates naturally as RPM's increase. Engine mounts are the...

Do you do rear axle bearings and seals? 2005 Ford Crown Victoria

Hello, unfortunately, rear axle bearing replacement is not a service YourMechanic offers at this time. However we can provide rear axle seal and brake service for your Crown Vic. Thanks for thinking of us! Sent to CS rear axle...

I have to replace the alternator on a 2007 Acura TSX - car won't start without replacing it. Car is at the dealership and they ha

If you fully charge the battery, you can start the car and drive it home assuming you live close to the dealership. That is a useful option because using YourMechanic's on-line calculator for your year, make and model, the cost...

Remote start quit working, check engine light on

The last mention about the Check Engine Light being on is the key. You should have the computer scanned and tested to see why the Check Engine Light is on. The codes can be the reason the remote start is...

Car running hot; won't keep coolant

Coolant leaks are serious problems because the entire cooling system pressurizes as it gets hot. There are many possible sources: radiator, water pump failure, heater hoses, freeze or expansion plugs in the block. I would suggest hiring a top-rated mobile...

Is a pitman arm considered a comment of a steering gear assembly?

Hello, the pitman arm is attached to the steering gear but is not part of the steering gear assembly. This part would not be covered unless it was replaced when the steering gear was replaced. You could look at the...

Related articles

How Often Do Spark Plug Wires Need to Be Changed?
Spark plugs provide the electricity necessary for combustion to happen by igniting atomized fuel in an engine's cylinders. However, they need a...
2012 Ford Mustang vs. 2012 Dodge Charger: Which One Should I Buy?
Technically these two vehicles have wildly different classifications: compact for the Ford Mustang and large car for the Dodge Charger. However, who would consider either one anything other than a muscle car? These cars are meant for speed, fun, and...
What to Do If Your Car Switches Get Wet
Your car switches are electrical components. They operate internal and external vehicle functions that require low currents in some cases...