Mechanics

SMOOTH IN NGV, "3 LIGHT" IN PETROL MODE

1994 Mitsubishi Pajero

Smooth in NGV mode (normal in Drive & stop). But when I turn into petrol mode, its totally cannot start the engine. It can be started when I "press" the key together with accelerator. Then rpm can up-to 2,000 max only. It will die when I stop all the "pressing". Could anyone help me on this please?
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Calista_2011
February 9, 2012.




Have the fuel pressure tested. Seems fuel is missing causing the problem.

KHLow2008
Feb 9, 2012.
Tks Mr Low. Will try & get back to you soon.

Tiny
Calista_2011
Feb 10, 2012.
This is 4G63. It has petrol & NGV. It is smooth when "NGV mode". Appear "3 lights" when "petrol mode". Where and how should I check? Expert plz.

Tiny
Calista_2011
Feb 11, 2012.
What 3 lights are you refering to?
Did you check the fuel pressure?
Did you test the fuel pump?

KHLow2008
Feb 11, 2012.
Fuel pressure & fuel pump function normally. I just change spark plug, then test drive. I found that, it turn black after I back from test drive. Why so fast? What does it means Mr Low?

Tiny
Calista_2011
Feb 12, 2012.
Too much fuel is getting to the cyliders which can be due to faulty injectors, Engine Coolant Temperature sensor, MAF.

Get a scan done to check for trouble codes.

KHLow2008
Feb 12, 2012.
I just set-up my workshop 2mths ago. Not ready for the scanner yet. I've a question here. Now, it has a "huge white smoke" from the exhaust when I start, petrol will leaking through exhaust. When I unplug the Air-Flow Sensor, leaking will reduce. Please advise. Tks
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Tiny
Calista_2011
Feb 15, 2012.
You could have a faulty MAF or a vacuum leak somewhere.

Unplug the NGV ECU for disabling the fuel injectors to see if problem goes away. A faulty ECU can be shorting the injector circuits and causing the flooding when NGV system is not being used. Check the injector wirings.

KHLow2008
Feb 15, 2012.
Dear Mr KH Low. My problem is solved 3 weeks ago. Due to replace a bad used injector. Tks for your kind assistance.

Tiny
Calista_2011
Mar 11, 2012.

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