Q: Possible vvt problems after piston change

asked by on

Hi Ben I took my car into the dealership because I was ideling ruff and when I turned on my car the rpm stayed at 2.5 even when I was in park. The repair shop states they needes to do an oil consumption test which i did. They said i needed new pistons which i had done. I called the shop to get my car after they had it for 3 weekes and they said oh we werw about to call u. The check engine light came on after the piston qork so we need to keep it to figure out whats wrong. He said we think we need to adjust the way the engine uses air. I said ok. I called back the next day to find out the guy I spoke to was fired and magically my car was ready. I asked about the check engine light which was never prior to them getting my car. He said it was taken care of. Went to get my car and the same thing was happening. Cslled on star who gave a code saying yhrottle body needed repair. That was done got my car back took it gor a test drive and noticed it took a long time for the rpm to change.

My car has 88000 miles.
My car has an automatic transmission.

Hi there. What you are describing is an incredibly odd way to diagnose a rough engine idle problem. First off, it’s highly unlikely that a piston has been damaged in less than four years and less than 100,000 miles - unless engine oil changes have not been completed as usual. Second, typically an engine idle problem as you’ve indicated is due to a vacuum leak or as Onstar correctly stated - a problem with the throttle body or other fuel system component. I’m not quite clear as to what services were actually completed by the other mechanic, but moving forward, I would recommend having a professional mobile mechanic come to your location to diagnose that throttle body problem first. From that point, they can speak with you about the previous repairs completed and recommend a course of action for you to take.

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. Possible vvt problems after piston change

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: How long will a diagnostic take on a car that has no power

Hi Erica. Thanks for contacting us tonight. It really depends on the root source of the no power issue that would determine how long a diagnostic inspection would take. Our professional mechanics always try to gain as much information about...

Q: Car wont stay running. Will start up but shuts back off. Fuel pump doesnt come on. Car will run with wire from battery to wire har

Hello, thank you for writing in. With the testing you have done, we know the fuel pump is good, and that the rest of the system is functional. This leave the electrical circuit. There are a few components in the...

Q: Are these GM OEM Parts?

Hello. If the A/C is not functioning on your vehicle then it can be caused by any number of parts. It can be low refrigerant, a bad compressor, a fan, or any number of other things. Whatever the issue is,...

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...