Tel: +1 905 240 8820

712 Wilson Road South, Unit 13, Oshawa, Ontario L1H 8R3

Lee's Autoworks (c) 2012

CAR IS RUNNING ROUGH OR HESITATING

6000 km:

Replace engine oil and filter

 

12000 km:    

Replace engine oil and filter.

Inspect front and rear brakes

Rotate tires, inspect for wear and adjust pressure.

Lubricate all hinges, locks, and latches with multipurpose grease.

Inspect tie rod ends, steering gear box and boots.

Inspect suspension components.

Inspect driveshaft boots.

 

18000 km:

Replace engine oil and filter

 

24000 km:

Replace engine oil* and filter.

Service front and rear brakes.

Rotate tires**, inspect for wear and adjust pressure.

Lubricate all hinges, locks, and latches with multipurpose grease.

Inspect tie rod ends, steering gear box and boots.

Inspect suspension components.

Inspect driveshaft boots.

Inspect parking brake adjustments.

Inspect brake hoses and lines (including ABS).

Check all fluid levels, condition of fluids, and check for leaks.

Inspect cooling system hoses and connections.

Inspect exhaust system.

Inspect fuel lines and connections.

Check all lights.

Inspect the underbody.

 

30000 km:

Replace engine oil and filter

 

36000 km:

Replace engine oil and filter.

Inspect front and rear brakes

Rotate tires, inspect for wear and adjust pressure.

Lubricate all hinges, locks, and latches with multipurpose grease.

Inspect tie rod ends, steering gear box and boots.

Inspect suspension components.

Inspect driveshaft boots.

 

42000 km:

Replace engine oil and filter

 

6000

 

 

If your car is running rough, you can do one of the following to solve the problem:

 

1) Plug in a OBD2 scanner into your DLC Port and see what the engine code is specific to.  Choose this option if your check engine light is on.

 

The roughness problem could be air process related. In which case, you can do one of the following to solve the problem:

 

2) Perform a smoke test which runs through the air box, turbo inlet pipe, turbo, intercooler, throttle body and intake manifold. Identify the areas where smoke is leaking out. Replace the leaking part or its related seals or gaskets.

 

3) Clean or replace air filter.

 

4) Clean or replace your MAF sensor. You can clean your MAF by spraying on the heating elements with a MAF cleaner. The one that we use is the MAF cleaner made by GUNK since it leaves no residue and it is available at your local parts store. Choose this option if the MAF sensor is dirty or malfunctioning and not able to send accurate signals to the computer. By unplugging your MAF, if your car no longer runs bad, then it is your MAF that is giving you the problem. Please note that unplugging your MAF will cause your car to go into limp mode and cause your check engine light to flash. The check engine light would stop flashing and car would come out of limp mode once you plug the MAF sockets together.

 

5) Clean the throttle plate by having the throttle body serviced. Choose this option if the throttle plate is dirty and is stuck in a closed position.

 

6) Clean TGV. Choose this option if the TGV is dirty and is stuck in a closed position.

 

7) Clean your intake system with combustion intake cleaner.  Choose this option if you want to clean the entire intake system to see if that will help your car with the roughness problem before deep cleaning the individual intake parts as suggested above.

 

The roughness problem could be fuel process related. In which case, you can do one of the following to solve the problem:

 

8) Clean or replace fuel pump. Choose this option if you feel that your fuel pump is weak and unable to push fuel through the fuel lines with enough pressure.

 

9) Clean or replace fuel lines. Choose this option if you feel that your fuel lines are blocked or are leaking so that not enough fuel is carried toward the injectors.

 

10) Replace fuel filter. Choose this option if you have either used low grade quality gas from cheap gas station or have a rusty gas tank causing rust flakes to collect at the fuel filter

 

11) Stop using low grade gas at cheap gas station.

 

12) Replace rusty gas tank that is causing rust to build up in fuel filter.

 

13) Clean or replace fuel injectors. a) Using fuel system cleaner and pouring the mixture in your gas tank. b) Remove the fuel injectors from your engine and have them cleaned with an injector tester and cleaner. Where pressured fuel are forced through the injectors where hopefully the plugged holes in the injectors would have a proper spray pattern.

 

Choose this option if you have fuel collecting in the intake manifold. Fuel would collect in the intake manifold if the fuel injector is plugged causing fuel particle to stick together and collect in the intake manifold rather than be carried into the combustion chamber as a fine mist.

 

14) Have your dealership or tuner look to see if your fuel map is adjusted correctly to your current setting.

 

The roughness problem could be spark process related. In which case, you can do one of the following to solve the problem:

 

15) Clean battery terminals or replace battery.

 

16) Replace alternator.

 

17) Identify which ignition coil and or spark plug wire is not working by swapping the set between different cylinders. Replace the defective ignition coil or spark plug wire.

 

18) Visually examine the spark plug. If it is covered with carbon or the tip of the spark plug is deformed, replace the spark plug. Choose this option if you have a very noticeable fuel smell from your exhaust pipe which indicates your car is running rich and causing carbon to cover the spark plug. Also choose this option if you have replaced your factor spark plug with other spark plugs. There is a chance that the car is not using spark plugs that are in the proper heat range for the car's current set up.

 

You can try experimenting with a hotter or colder range spark plug so that you can find one that will no longer be covered with carbon or end with deformed tips after a few test runs.

 

19) Have your dealership or tuner look to see if your ignition timing map is adjusted correctly to your current setting.

 

The roughness problem could be combustion process related. In which case, you can do one of the following to solve the problem:

 

20) Run fuel cleaner to see if you can clean off the oil, carbon deposit at the intake valves causing the intake valves to not properly close when they are suppose to against the top of the combustion chamber.

 

21) If the fuel cleaner in step 19 did not help the roughness problem, replace intake valve and intake valve stems if needed

 

The roughness problem could be exhaust process related. In which case, you can do one of the following to solve the problem:

 

22) Perform a smoke test which runs through the exhaust manifold, up-pipe, turbo, down-pipe. Identify the areas where smoke is leaking out. Replace the leaking part or its related seals or gaskets. Fixing the leaks are important as they can affect the reading by the O2 sensor

 

23) Replace defective O2 sensor.  Choose this option if the O2 sensor is stuck at a certain voltage which means the sensor is giving you the problem.

 

24) Replace plugged catalytic converter that is not allowing the exhaust gas to exit the car resulting in excess oxygen gathering around the O2 sensor so to give O2 sensor faulty readings. The roughness problem could also be PCV valve process related. In which case, you can do one of the following to solve the problem:

 

25) Replace the PCV valve.  Choose this option if you have a plugged PCV valve. If you take the PCV valve in your hand and shake it and can't feel or hear a clicking noise, then you know the valve is gummed up and it is your PCV valve that is giving you the problem.

 

The roughness problem could as well be EGR valve process related. In which case, you can do one of the following to solve the problem:

 

26) Replace the EGR valve.

 

Lastly, the roughness problem could be turbo boost building process related. In which case, you can do one of the following to solve the problem with your car driving roughly:

 

27) Clean or replace defective MAP sensor.

 

28) Clean or replace boost solenoid.

 

29) Clean or replace wastegate. Choose this option if you find that your waste gate is stuck in either the open or closed position

 

30) Clean or replace turbo.  Choose this option if you find the turbo fins would not spin even when you try to push it with your fingers.

 

31) Have your dealership or tuner look to see if your boost map is adjusted correctly to your current setting.

 

32) Allow your turbo to cool down for 3 minutes after driving before you shut off the car.  If you don't cool down, your turbo fins shaft can seize from the lack of oil lubrication. Since the deposits are not allowed to recirculate during the cool down, deposits might sit at a certain spot on the turbo and hardened which will prevent oil from passing through in the future. The lack of oil passing through would cause the turbo to overheat and damage the turbo fins shaft as a result.

 
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