I need to make the carbon cleaning on my GDI Mitsubishi

gasoline direct injection ?
if no fault codes are present

many owners from pajero forums report
these type of set ups carbon up

inlet manifold off and de-carbon valve intakes is one possible fix

some owners mechanics could not fix the power loss
..a few owners traded them in

images for 1998 Mitsubishi rvr 4g64 GDI engine removal

Check to see if #1 &4 use a common coil pack. If so, = likely culprit.

Simplem fuel pres pump. have it remove and clean it

my 2000 4w drive mitsubishi io 2w drive light is flashing while in 2w drive

If you have the GDI model,they were designed to run on very lean air/fuel ratio.
Once the mileage is up a bit a lot of problems can be traced back to a high carbon build up in the intake manifold.

In short,it's all cause by carbon built up.

EGR valve can fail after 100,000 miles.

===
Check for

vacuum leaks on intake manifold,

the air tube between the air filter.

intake manifold vacuum hose.

===
clean throttle plate with Berryman carburator cleaner

SEE sample picture HERE
===

Also remove carbon built up behind the EGR valve and the EGR passage tube.

===

Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.

More un-metered air (leaks) will lean out the fuel mixture.

Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.

At idle,just spray and listen for the RPM surge.

The in-rush of carb clearer will increase the RPM on the motor.

Record the problem spot(s) and address it later.

===

EGR carbon built up require 2+ hours to clean from start to finish.

You will need a new EGR base gasket before your start.

Locate and remove the EGR valve after the vehicle is cool down.

Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.

Remove the EGR valve.

Inspect the location of the carbon built-up inside the valve and the EGR passage tube.

SOAK these areas with WD-40 spary.

You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.

RE-SOAK the carbon and let it sit for over-night will also help.

One the last round,pass a shop vacuum of the EGR valve and the passage pipe.

Install the new EGR gasket and connectors.

Allow the vehicle to warm up outdoor to burn up any remaining WD-40.


Take it for a test drive.


Please rate my answer if it's useful to you.


Cheers,

Mustgo

Check for

vacuum leaks on intake manifold,

the air tube between the air filter.

intake manifold vacuum hose.

===
clean throttle plate with Berryman carburator cleaner

SEE sample picture HERE
===

Also remove carbon built up behind the EGR valve and the EGR passage tube.

===

Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.

More un-metered air (leaks) will lean out the fuel mixture.

Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.

At idle,just spray and listen for the RPM surge.

The in-rush of carb clearer will increase the RPM on the motor.

Record the problem spot(s) and address it later.

===

EGR carbon built up require 2+ hours to clean from start to finish.

You will need a new EGR base gasket before your start.

Locate and remove the EGR valve after the vehicle is cool down.

Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.

Remove the EGR valve.

Inspect the location of the carbon built-up inside the valve and the EGR passage tube.

SOAK these areas with WD-40 spary.

You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.

RE-SOAK the carbon and let it sit for over-night will also help.

One the last round,pass a shop vacuum of the EGR valve and the passage pipe.

Install the new EGR gasket and connectors.

Allow the vehicle to warm up outdoor to burn up any remaining WD-40.


Take it for a test drive.


Please rate my answer if it's useful to you.


Cheers,

Mustgo

unsure which engine model you have. is a real common problem here with gdi v6 models,cleaning air mass meter(usually in ducted pipe connected to air filter) and throttle body with bottle brush and good carbon removing solvents restores the idle speed and ecl should go out. engine may be covered by plastic cover,this removes easily 4-6 bolts and allows access to throttle body failing that low idle could be limp mode.it triggers when either a major sensor faults or more that 3-4.the ecu will need to be checked for fault codes and then a plan of repair will be more effective

ts runing high 2300 check the vacuum with a gauge and unplug egr lines ..egr could be plugged ..oxy sensor could be open loop running rich...tps ar air flow meter ...