Rough engine after service

Without codes showing up, there is not much to say. What sort of service? Rough idle is quite often about worn spark plugs, or a dirty MAF/ throttle body, PCV valve, or a bad batch of petrol. It could also be the sensors in the exhaust pipe, but those usually turn on the check engine light if they are out. If the service people disconnected the 12V battery, there will be some relearning of the mixture by the ECU after the car is started again, but that should be done by now.

 

How many miles are on the vehicle ? When was the last time you serviced the spark plugs ?

What did the service consist of ? Intermediate service means nothing to me, so I need to know what was done.

It could be any number of issue's. If the MIL didn't come on, it's probably not a big deal.
Sitting for two day with a rough start could be a time related issue.
Most time related issue's involve a leak and the 2 biggest leak factors are coolant and fuel.
A head gasket that leaks coolant into the cylinder can cause this type of issue. Did you see any
white smoke after it ran for a little while ? Are you noticing any coolant loss or leaks ?

Fuel injectors can leak past the pintle seal and cause this problem too. Look for black smoke after
start up of the ICE. Injectors are the most common cause of this type of problem. The only way to
test for injector leaks are by watching long term and short term fuel trims. If the PCM is removing fuel
it's a good possibility you could have a leaking injector(s) The only way to verify this without taking it apart would be to pressure cycle the system when cold a few times. This builds up pump pressure and would make the injector(s) leak at a faster rate. Watch the misfire PID's and look for the problem cylinder(s). If you see misfires on certain cylinders, you'll know which injectors are the probable cause. Then you can pull the rail and do a drip test to verify the problem child(s) Sounds like fun, huh

 

It needs further investigation.

Do you have a gen2 or the later gen3 as 2009 was the year when they changed over.

Has the oil been over filled? What are your mpg's like? Double check your tyre pressures.

The shake is reported on the gen3 usually after the car has been stood for a few days in damp conditions. It can be fixed by replacing a manifold, but it's only happened to me 3 times in 80,000 miles so I haven't bothered.

If the car is noisier then it sounds like they've used 0w20 oil instead of 5w30 oil. This should give smoother transitions and much improved fuel economy, assuming you have a gen3.

Few more details about your car and symptoms are required.

 

Take it back and get them to check it.

Which dealer did you use? I've taken my car back in the past and they've always been accommodating. Maybe give them a ring this morning and tell them your concerns to get the ball rolling. They may get you to pop over if their service dept is open today.

 

So it's an oil change

 

Check the oil level to make sure it is not over full. This is a known problem with the Prius.

John (Britprius)

 

Pandalover,
If you look carefully at the full service against the intermediate you will find the only difference is in a load of safety checks. All of these checks and more are done in our MOT only in greater depth. I do mean all.
I never have the full service done and have the MOT done a few days before the my service (intermediate), otherwise you pay for the same thing twice.
I always check the engine and cabin air filters before the service and change them if required. This takes minutes and you save a lot of money on dealer prices.
I also tell the dealer not to change the fob battery as my dealer charges £5 for a fob battery "I can buy 5 branded batteries for £1". The only reason I have services done at the dealer is to keep a full set of service stamps in the book.

An intermediate service is £129.
A full service is £199
An MOT at the dealer is £54.85. I get it done at my local mot station for £30.

John (Britprius)

 

Apparently dealers don't make money on service. Oh hang on, that's another thread