Q: 2003 Mitsubishi Outlander XLS: fixed oil leak, replaced gaskets on exhaust, intake, and cyclinder head. Car now idles rough/stalls

asked by on

Car had oil leak and code P0420. After cleaning the vehicle of Red RTV on all gaskets and replaced with new (exhaust, intake, cylinder head, exhaust pipe, throttle body gaskets; plus new thermostat, new spark plugs, new wires, changed oil & filter, flushed radiator, new coolant, new O2 sensors, & serpentine belt).

After finally cleaning oil spills on all parts and running vehicle to check for leaks no leaks exist. However, unless it is cold started the car runs on very low idle & eventually stalls.

When I put my OBDII scanner I acquire no codes. However, the following have come up the course of the month I have been working on vehicle:

P0102 P0107 P0113 P0335 P0420 P0506 P0507

As of today when I checked again none of these codes came up. The only ones I cleared a couple months ago were P0420 and possibly 1 other one but don't recall. The rest I never erased but they did not come up.

Is there a procedure for the car relearning proper idling?

My car has 99999 miles.
My car has an automatic transmission.

It is possible that you could have a vacuum leak. I would recommend having your vehicle smoke tested to determine where the source of the leak is. Perhaps the intake gaskets are not properly seared causing an incorrect air fuel mixture.

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. 2003 Mitsubishi Outlander XLS: fixed oil leak, replaced gaskets on exhaust, intake, and cyclinder head. Car now idles rough/stalls

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 turns over but wont spark. Getting camshaft position sensor code. 2004 Hyundai Sonata 2.4l

There is no fuel pump cut off switch. If the pump has failed, depending on the failure mode of the pump, you can diagnose the fuel pump yourself. Turn the key to the ignition (run) position. At that instant, you...

Q: Smoke coming from dashboard

Hello. Smoke coming from the dash can come from a number of places. If the smoke is more like steam and it causing mist in the vehicle then it may be a leaking heater core. If the heater core is...

Q: Does this vehicle have an interference engine??

This engine is an interference motor that most likely bent valves when the timing belt broke. An issue like this calls for major engine repair. Whether you decide to fix the engine or get a new car, be sure to...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.