Skip the auto shop - Our mechanics make house calls

Q: Vacuum leak on the dash

asked by on

I've got a vacuum leak light on my dash. I've put a code scanner to tell me what part of the system isn’t up. My car also runs at times and won't go past 30 until I turn off my car and let the computer reset it and then it's normal.

A: Code scanners aren’t really going to help y...

Code scanners aren’t really going to help you with that. They can tell you if there’s a large leak, a small leak, and stuff like that. But, to really find where’ the leak is coming from, you will need a dealer-level scan tool and a smoke machine. These are complex tools. You’ll generally need a professional mechanic to find that type of leak.

If it won’t go past 30 miles per hour, then you’ve got some serious problem. If I were you, I would have that looked at relatively soon, because that is a pretty serious problem that you’ve got going on. Have a mechanic take a look with a dealer-level scanner and diagnose your car’s problem.

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: 1997 GM TBI 5.7 : Idle too high

Hi there. Check for any vacuum leaks that the engine may have. Look for any vacuum hoses or ports that are not connected. Vacuum leaks on the engine will contribute to the engine having a higher idle. If the vacuum...

Q: My car isn't hard to steer but I was noticing some changes in the steering and when I step on the gaside my engine revs and no psf

If you have been adding power steering fluid multiple times let alone once the system has a leak. With having to add that much fluid, there will most likely be evidence of fluid on the ground under the vehicle. While...

Q: Can car jolting be caused by bad IAC valve?

Yes, if it's bad it creates vacuum leaks, and when you get vacuum leaks, it gets wrong data to the computer and it gives the wrong amount of fuel to the engine. The air-fuel ratio is mixed and that can...

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...
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...
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...