Skip the auto shop - Our mechanics make house calls

Q: 1968 Ford Mustang has an intermittent surge at idle

asked by on

The car had not been run in a year and a half. I replaced the fuel pump and carb. I put in an Edelbrock 1400 and I have not been able to figure out why the has an intermittent surge at idle rpms jump up and go down like a seesaw .
My car has an automatic transmission.

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: Car is idling rough - 1983 Jeep CJ7

Hello. This behavior sounds like the power brake booster has a leak or rupture, which acts like an air leak to the engine. Since the brake booster vacuum is generated by the engine's air intake, their functions and potential problems...

Q: My battery light is on and my check engine light is on and it's loud

Hi there: Both the battery light and check engine light are triggered when the ECU receives a trouble code triggered by a sensor or electrically controlled component. The two are not always related, so you might have multiple issues going...

Q: Wont turnover

Check the main engine fuse box and look for fuse number 27. Remove the fuse to see if it is blown and discoloration in the socket. The fuse holder cannot handle the load on it, causing it to overheat. You...

Related articles

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.