Q: Vacuum linse hooked up backwards on the engine.

asked by on

I noticed my vacuum line from brake booster went to carberator and vacuum line from valve cover went to intake manifold, would I notice a difference in performance, the motor is a 383

My car has 2000 miles.
My car has an automatic transmission.

Hi there. The vacuum hose to the valve cover is not to be under engine vacuum but rather under throttle vacuum. The lines on the valve cover are for ventilation only from leaking combustion gasses. The brakes will work very good when the vacuum line has engine vacuum and not throttle vacuum. Check the vacuum on the brake booster and make sure that its reading engine vacuum (17 to 22 hg of vacuum). This hose should be hooked up to the manifold. Check the hose to the valve cover and make sure that there is no vacuum on it and hook it up to the carburetor with only throttle vacuum (0 to 5 hg of vacuum). If you need further assistance with your vacuum lines, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Vacuum linse hooked up backwards on the engine.

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: I did a brake conversion on my 79 Camaro and went from drum to disc. brakes are spongy.

Hi Clifford. Thanks for contacting us today. Based on your description, it sounds as if you've got a few air bubbles trapped in the brake lines. This is rather common with brake conversion projects, as it can take quite some...

Q: Blowing oil through valve covers.

Hi there. Check the positive crankcase ventilation valve (PCV) and see if it's plugged up. Also, check the engine oil and make sure that there is the proper amount of oil in the engine. Too much oil or a sticking...

Q: P0401 keeps coming on, already done, cleaned carbon, egr replace, egr tube, pigtail harness.

Claimed by Kevin Gainer

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...
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...