Skip the auto shop - Our mechanics make house calls

Q: Engine swapping on a Subaru

asked by on

I'm interested in engine swap on my Subaru. If it's cold outside, it starts up fine, but if it's hot or the car has been running for a while, it takes multiple times before it turns over. Car runs fine if it starts. The compression is good.

A: When the car starts cold, it needs extra fu...

When the car starts cold, it needs extra fuel. That’s just how the cars work. So if you have a normal car that is running perfectly and when you turn the key, the computer sends extra pulse to the fuel injectors so it starts when it is cold.

If your car starts fine when it is cold, but then when it’s hot, it doesn’t start and you’ve got to crank it over. That generally means that the fuel injectors are probably leaking or the fuel pressure regulator’s leaking. Because a hot engine is hard to start if it has too much fuel. It doesn’t need extra fuel. So you probably have a leak in the fuel injection system somewhere. Have the car looked at by a professional so they can locate the leak and make the repairs needed to resolve this issue.

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: Temperature gauge goes up and down and I have to replace antifreeze daily

Hello, thank you for writing in. The smoke from the exhaust and the loss of coolant most likely means that your head gasket has failed, and is leaking coolant into the engine. The coolant gets burned up with the air/fuel...

Q: replace wheel hub bearing on Subaru Outback

Hi there. Depending on where you live, one of our mobile mechanics might be able to complete the wheel bearing replacement (click this link to submit a quote request) for your Subaru Outback. I would recommend that you have all...

Q: Car turns over but wont start. 1999 Pontiac Grand Am

Hey there. You'll need to have the fuel pressure tested also. If okay, then you need to see if your injectors are opening to supply fuel. If you have compression, fuel, and spark, then the engine should run. I recommend...

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...
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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...