Skip the auto shop - Our mechanics make house calls

Q: Intermittent "no start" or dies while running fine on highway - what's wrong? 2003 Buick Rendezvous

asked by on

Sometimes jumping it helps sometimes it starts on its own sometimes it dies driving down the road. When it dies the rpms jump around and then it dies. The last time it locked up the security system as well.

My car has 220000 miles.
My car has an automatic transmission.

A: Hi there: Once the vehicle starts, the job...

Hi there:

Once the vehicle starts, the job of the battery is pretty much done; which means if you’re having issues with the vehicle shutting off, it’s most likely caused by ignition system components; such as a the distributor or the crankshaft position sensor perhaps. It’s possible that you have battery cables that are corroded or a battery that’s losing cold cranking amps. Since there are multiple items that could be causing your issues, it’s probably a good idea to have a professional mechanic complete an engine is hard to start inspection.

Was this answer helpful?

A: Hello - you don’t indicate if either the &q...

Hello - you don’t indicate if either the "no start" or "dies while running down the highway" scenarios results in a Check Engine light condition, but I would check for problem codes either way. For both stalling and no-start conditions, a failing crankshaft position sensor or a failing fuel pump/faulty fuel pump relay would behave similar to what you are experiencing. I believe these problems have the same source. I would recommend a thorough inspection of the fuel supply and ignition systems completed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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

Q: Starting issue, fuel smell

The fuel pressure would need to be checked to make sure the pressure regulator is not leaking fuel and that the pressure is correct. You may have a leaking injector if the pressure is okay. I recommend having a certified...

Q: My 93 Buick Regal limited is smoking under the hood on the driver side

Hello there. Smoke rarely comes from the engine bay, and if it does, the issue is typically critical already. If there is a problem within the engine that produces smoke, that smoke will exit the engine through the exhaust. In...

Q: overheat

Try to replace the thermostat in the engine and refill the system to see if the overheating is fixed. Also, make sure the cooling fans are coming on. If you would rather have this looked at before replacing any more...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...