Q: will start after jumpstart and then wont idle

asked by on

Changed head gasket and intake gasket made sure everything was tight put back together properly however when I go to start it up it will crank and crank but not fire so I jumped it off another vehicle and was able to get it to fire but then it would not idle and died.

My car has 201000 miles.
My car has an automatic transmission.

If your engine will not run after being jump-started and the cables are disconnected, I would recommend ensuring that the connections to your alternator are good. If the alternator is not connected properly or is faulty, this could cause the engine not to run. Since it is likely that the alternator was removed in order to replace the head gasket, I would recommend the alternator being the first place you check.

If you are in doubt about this repair, I suggest enlisting the assistance of a qualified professional, such as one from YourMechanic, to perform an alternator replacement.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. will start after jumpstart and then wont idle

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: Input shaft swap between automatic and manual transmission possible?

Hello there, the input shaft is different between the automatic and manual transmissions of your 1993 Chevrolet Blazer. The part numbers are different between the two parts, this indicates the input shaft is not able to be swapped between the...

Q: Car cut off white smoke came from hood changed radiator starter still won't turn over when it shut off the battery light came on

When the engine was overheated you must of blown the head gasket to the engine and coolant getting into the oil of the engine can damage the bearings of the engine. You should have the head removed and checked for...

Q: Crank but won't start - 2000 Lincoln Town Car

Hello. You will need to check the computer by scanning it to see if codes for no start are stored in memory. Have the fuel pressure tested and ignition system tested for proper fuel to the injectors and spark to...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.