Q: Won't Start in rain

asked by on July 27, 2016

My Safari AWD won’t start when it rains. If I crank it every few minutes for an hour or two it might start. And my van will start right up if you wait for it to stop raining and dry off a little. Then it runs perfect! The electronic brake monitor was changed at the local GM dealer and cat went out of it. Do you know why this happens? Thanks.

Hello. It sounds like moisture may be causing the camshaft sensor or crankshaft sensor to give an improper reading of engine timing. The camshaft sensor and crankshaft sensor read the timing of each respective shaft. If one or both of these sensors are faulty or being affected by the rain, it may be difficult to start that engine.

It is possible for corrosion in the connector to cause this type of problem, and corrosion is created by excess water/moisture. An issue with the battery and charging system could also cause problems with starting the engine when it is raining. Have a certified technician, like one from YourMechanic, inspect your battery and charging system, as well as assess your problem to determine if the camshaft position sensor and/or crankshaft position sensor needs to be replaced.

Was this answer helpful?
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

Get a quote

What others are asking

How long does it take to replace the compressor bracket

Once the compressor is removed from the bracket, then there is only a couple of bolts that hold the bracket to the engine block. Make sure the compressor rear bracket is tightened or the new bracket will break. The bracket...

Steering wheel is not locking & key switch wont turn

It sounds like your kids may have broke the ignition lock assembly in the steering column. There are a few different column components that may have been broken. The parts are made out of pretty soft metal by the manufacturer...

Battery not charging and car unable to start

The problem you are having sounds like a starter assembly failing, but this usually causes a click from the relay or the starter assembly which is fastened to the engine. I recommend having a local expert, like one from YourMechanic,...

Related articles

How the Starter Works in Your Car
A A car starter is a powerful electric motor that cranks your engine in order to start your car. The starting system consists of the motor itself, and the attached solenoid. The solenoid is what takes battery power and delivers...
Starter or Car Battery: How to Diagnose Which Part is Bad?
A dead car battery is a common cause for a car not starting condition. A faulty car starter motor can have similar symptoms, but the fix is different.
Starter or Car Battery: How to Diagnose Which Part is Bad?
A dead car battery is a common cause for a car not starting condition. A faulty car starter motor can have similar symptoms, but the fix is different.