Skip the auto shop - Our mechanics make house calls

Q: Shutting off and difficult startup - 1978 Jeep CJ5

asked by on

After having replaced the rods and lifters, I drove my jeep briefly and it just shut off. I checked the jeep, and found the fuel filter to be dry. So, I had the fuel pump replaced. The jeep now runs but not well. Upon startup, it begins shaking in the carburetor area so I have to get the engine running and get out quickly to cover the carburetor. When I cover it with my hands, it works well. In order to rev the engine up, I have to play with the throttle. I would get some more air if I move my fingers a bit. But, if I move the throttle, the jeeps shuts off. When it idles, there is a loud air sucking noise. What could be the issues?

A: Hey there, thanks for writing in. It sounds...

Hey there, thanks for writing in. It sounds like you may have a large vacuum leak. Ensure the PCV system is hooked up correctly and that there are no broken or damaged vacuum lines. A smoke check of the induction system may need to be carried out to find the source of the air leak. You may want to enlist the help of a professional, such as one from YourMechanic, who will have the tools and expertise to pinpoint the source of the unmetered air leak and diagnose the stalling 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Loud rattling coming from bottom of car

Hi. This should be inspected soon as damage to the underside of the car can be costly. There are metal and rubber mounts that hold up the exhaust system which over time can become loose. This could also cause damage...

Q: Vehicle starts sometimes, but dies and won't restart.

To clarify, the year (1978) of the Chevy Suburban in question you are asking about refers to some EFI terms that a vehicle of this year would not have otherwise come with from the factory. The answer below assumes this...

Q: Car won't crank or turn over, cannot be jump-started

Hey there. This sounds like the starter or starter solenoid has failed. Given that jumping the battery does not work, it is more likely the starter solenoid. Have a professional mechanic, like one from YourMechanic, diagnose the starting problem in...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...