Q: Vacuum linse hooked up backwards on the engine.

asked by on December 07, 2016

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.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

I already have an inspection code why do you want to charge me 70.00 the code is P0304

P0304 is a "trouble code". The diagnostic fee that you are probably referring to relates to a check engine light diagnostic. The cost component in the check engine light diagnostic involved in merely downloading the "code" is trivial and, indeed,...

Drivetrain

I'm not clear on whether you were able to operate the car after changing the CV shaft and the car failed again, or if you never got it working at all. As you say, it could be a problem in...

Cracked radiator and cracked exhaust header which to fix first in need to repair fast and cheap for now,

The exhaust manifold should be replaced FIRST. If that crack happens to leak exhaust gases, that means CO can get into the passenger compartment. If that happens you won't have to worry about repairing the radiator. That manifold can be...

I have a question, can I replace the ECM on this 2002 Dodge Intrepid engine with a used one?

Claimed by Kevin Gainer

I am getting the P200A check engine light

The trouble code that you have listed is associated with a known problem for the intake manifold runner control system. There are some 2011 and 2012 model year vehicles that have a current recall to have the control module reprogrammed...

How will I know if it's my valve timing control? Will this mess with my vehicle wanting to start also?

Hi there. The valve timing controls are pressurized and operated electronically and engine oil pressure. First perform an oil change with a new filter to ensure a good clean engine. If the timing is still not right and the engine...

Our 2005 jaguar ran out of gas Now it won't start we added gas and turn the key on an off four times it sound like it will

When a car has a lot of miles on it, as yours does, running out of gas can damage the fuel pump. Most cars these days have the pump submerged in the fuel tank and the fuel passes through the...

Cost to install transmission? 2008 Cadillac CTS

Hello - unfortunately, this is not a service YourMechanic offers at this time. I recommend you check with a reputable transmission repair shop in your area for a transmission replacement quote. Thanks for thinking of YourMechanic though!

Alternator problem, the wipper stops as soon as you take it to the highest,cracking sound in the morning that stop after cluching

Hello. From what you describe it would appear that the vehicle is experiencing more than one issue. The first thing I would address is the alternator, as a faulty alternator can leave the vehicle stranded if the battery dies. I...

Related articles

2012 Ford F-150 vs. 2012 Chevrolet Silverado: Which One Should I Buy?
When you’re ready to really get some work done, there’s nothing like a full size pickup truck. These trucks are ready to haul a big load and really get in there and get busy. SUVs are great for moving people,...
Symptoms of a Bad or Failing Brake Booster Vacuum Pump
Diesel vehicles that have a stiff brake pedal with power brakes working intermittently may need to have the brake booster vacuum pump replaced.
The Best Used Cars to Buy If You're Towing a Boat
If If you’re towing a boat, the vehicle that you buy is largely going to depend on the size and weight of your boat plus trailer. Most cars, realistically, aren’t cut out for the job. We recommend a pickup truck...