Q: RPM going up and down with hard startup on a Fusion

asked by on

I have my Fusion parked. I've noticed my RPM go up and down noticeably. I don't recall this before. I remember the times when the AC was up and definitely when it was on. I think the car starts hard too, like 1500. Do you think it is hill related?

If it only happens when you are on a hill, it is definitely hill-related. The fuel pump could be starting to go out, because then all the gasoline slides to just one side. But more often, if it happens all the time, it is either the carbon building up, the throttle that needs cleaning or a vacuum leak that is present. So, try my video "how to fix the car that idles poorly" and try cleaning the throttle. You can also watch my other video, "finding engine vacuum leaks with a cigar" and try to find where the vacuum leak is. A lot of times when you get a vacuum leak, it is going to go up and down and it’s going to idle higher because it is sucking more air in. If you still need help with this, you can have a certified technician from YourMechanic inspect your engine’s high idle and let you know what repairs are needed.

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. RPM going up and down with hard startup on a Fusion

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: So recently i had my car serviced for the water pump, gasket, heater hose T and cam sensor repaired on 1/16/2018 now my engine lig

The code P144C has no connection to the past repair work you have described. P144C refers to the purge valve on the charcoal canister. The purge valve remains closed until the PCM commands it opens. If the PCM doesn’t see...

Q: Car is jerking for a while and then runs fine

The TCC is the torque convertor clutch solenoid inside the transmission. To get it replaced you would need to have the pan removed and the TCC solenoid tested and replaced. If all your drive issues start to happen after...

Q: My car died and won't start what could the problem be?

Hello. A no start condition can be caused by many things. If you believe that the engine may not be getting fuel then I would start with examining the vehicle's fuel system. It may be possible that one of the...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...