Pajero 3.5 (6g74) wont start. Switched off at home and an hour later it will not start. Sound like for a second or two the engine wants to fire up but does not take. Done diagnostics with Launch X431, error FRP Sensor showed up. Replaced FRP as well as Hi-Pressure pump. Bridged tank pump relay & pressure tested delivery fuel line OKAY. Still the reaction is Almost starting but NOT starting! 2nd diagnostic shows No error codes. What could be the PROBLEM? I am Desperate!!!
Easy to sort out on 4g93.just remove gdi pump and take out the filters from fuel passanger,clean and fit it back.
Did you erased the code manually or the code clear itself?
I erased the code manually and aftterwards no error but still no starting. Thank you for the reply.
MAarcos I erased the code manually and it did not re-appear, also then fitted another FRP Sensor for double measure. So cannot tell if old sensor was really faulty. Both sensor and hi-press fuelpump that I replaced are 2nd hand but comes from Pajero that was running but knocked a bearing so I am convinced that these units are fine. I do not smell any diesel in the fuel and fuel delivery is constant before hi-pressure pump. How can I test final delivery of fuel and what must the pressure be at rail? Have got fuel pressure test equipment. Thanx Charles
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SOURCE: gdi engine issues
I got the same trouble, launch shows Air Flow Sensor, Fuel Pressur switch. Ireplace both few hours OK but again same trouble.
GDI got a common truble its high pressor fuel pump.
check fuel pressor if its low thats the prob
bye
SOURCE: Mits lancer 2003 , car broken into now wont start.
check fuses and fuel pump relay, and sometimes a simple bump or jolt or short can set off the fuel pump safety switch and is usually locates in the trunk hidden or glove box.
SOURCE: have a 2007 mitsubishi L200
In your case the pressure sensor is faulty and needs to be replaced. 1) Stores pressurized fuel (25 to 180 MPa) that has been delivered from the supply pump and distributes the fuel to each cylinder injector. A rail pressure sensor and a pressure limiter valve are adopted in the rail. 2) The rail pressure sensor (Pc sensor) detects fuel pressure in the rail and sends a signal to the engine ECU, and the pressure limiter controls the excess pressure. This ensures optimum combustion and reduces combustion noise. ---- Rail • The rail is mounted between the supply pump and the injector, and stores the high-pressure fuel. --------- Injector:-------- • This injector replaces the conventional injection nozzle, and achieves optimal injection by effecting control in accordance with signals from the engine ECU. Signals from the engine ECU determine the duration and timing in which current is applied the injector. This in turn, determines the quantity, rate and timing of the fuel that is injected from the injector. ------------ Rail Pressure Sensor (Pc Sensor) 1) The pressure sensor detects the fuel pressure of the rail, and sends a signal to the engine ECU. The sensor is made from a semiconductor that uses the Piezo resistive effect to detect changes in electrical resistance based on the pressure applied to the elemental silicon. In comparison to the old model, this sensor is compatible with high pressure. ---------- There is a service manual for how the fuel rail sensor and fuel system works.Its for mitsubishi L200 4D56.----------- Click this link for referring the service manual:--- http://technoanswers.blogspot.com/2011/06/service-manual-for-mitsubishi-l200-4d56.html ----------- This should help.thanks.Helpmech.
SOURCE: Mitchibishi pajero 3.5 v6 diagnostic test describe
if it is truly running on 4 cylinders I don''t know where the sensor would come in to play as being bad, but it is telling you that you have a problem. Sounds to me like you need to check and see if you have 3 coils, 1 for every 2 cylinders. Sounds like 1 is bad.
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