Skip the auto shop - Our mechanics make house calls

Q: Car starts but won't when warm - 1990 Pontiac Firebird

asked by on

Okay so I have a Pontiac trans am 305 tpi v8 its been acting weird the car wolill start cold but after few mins of warming up I shut it off an after that it will not start but after hour or so will start again not really sure were to start thought it might be a sensor or something just not sure what one at this time I don't have lots of money to just be buying parts want to try figure it out before changing stuff that's still good what should I do ..

My car has 140021 miles.
My car has an automatic transmission.

First order of business is to check for any diagnostic codes. This will make diagnosis faster and less expensive. Even though this model is pre-OBD II, there are on-board diagnostics. Both ignition and starter components can be heat-affected, but fuel related issues can also be a problem.

Malfunctioning temperature sensors (for engine management not the gauge) can cause "false cold" symptoms, flooding the engine. Fuel supply issues - low fuel pressure, weak fuel pump, clogged fuel filter, etc, are also accentuated with hot start.

I would recommend having a certified mechanic, such as one from YourMechanic, complete an inspection to determine why the engine is hard to start, diagnose this problem, and get an accurate assessment of damage and a 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

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: Battery saver system car won't turn and battery good and starter. Whole dash illuminates when I turn key though, no alter

Have the battery load tested in case it was short circuited. Reverse polarity, at the battery, in a 12 volt electrical system on a car can cause a variety of effects including damaging the alternator, diodes and the numerous microprocessors...

Q: Air conditioner & heater problem

The problem you are describing is possibly caused by mis-operation of the "flapper doors" that control and direct air flow throughout the various HVAC outlets. These doors are operated by cable or by servos. It is also possible that there...

Q: Will a 95 RWD transmission be compatible with a 94 4x4, both F-150.

Hi there. The transmission in your truck is called an AODE or 4R70E. This type of transmission did not change year of design until 1998. From the year 1993 to 1997, the transmission was the same. The only difference was...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...