Transporter injection problems

Hi people. I Have a workshop in Australia. I have problems with 2 transporters.

1 1999 T4 carravelle 5 cyl petrol ACU engine no codes showing. acting like fuel blockage. Goes OK for short distance then loses power. Has new injectors recently fitted 2,000 km ago. change the fuel pump assembly, fuel filter flows through nicely, changed fuel rail pressure regulator. I am running out of ideas, Can any one offer a sugestion?

2 T25 (T3 syncro)2.1 MV engine. runs very rich suddenly happened on a trip. Tried, changed computer, air flow metre, temp sender, pressure reg, switch under throttle body. even fitted capacitor to air flow metre.

Both these cars driving me crazy. If any one has some tips I have not tried, would be glad to hear about it.

Otherwise I hope you all have a great 2013

Hi people. I Have a workshop in Australia. I have problems with 2 transporters.

1 1999 T4 carravelle 5 cyl petrol ACU engine no codes showing. acting like fuel blockage. Goes OK for short distance then loses power. Has new injectors recently fitted 2,000 km ago. change the fuel pump assembly, fuel filter flows through nicely, changed fuel rail pressure regulator. I am running out of ideas, Can any one offer a sugestion?

2 T25 (T3 syncro)2.1 MV engine. runs very rich suddenly happened on a trip. Tried, changed computer, air flow metre, temp sender, pressure reg, switch under throttle body. even fitted capacitor to air flow metre.

Both these cars driving me crazy. If any one has some tips I have not tried, would be glad to hear about it.

Otherwise I hope you all have a great 2013

try look for a clogged catalysator or falled apart indside

Hi,

1. If petrol ACU engine then read:

› Transporter 1991 > › ACU AET API AVT › Engine, mechanics › Fuel supply system ›
Checking electronic power control (EPC)
Function of EPC system

With the EPC system the throttle valve is not operated by a cable. There is no mechanical connection between accelerator and throttle valve.

The position of the accelerator is transmitted to the engine control unit by two accelerator position senders (variable resistors together in a housing) which are connected to the accelerator pedal.

The position of the accelerator (drivers requirement) is the main input value for the engine control unit.

The throttle valve is operated over the complete revolution and load range by an electric motor (throttle valve positioner) in the throttle valve control part.

The throttle valve is operated by the throttle valve positioner which is controlled by the engine control unit.

When the engine is not running and the ignition is switched on the engine control unit moves the throttle valve exactly as prescribed by the accelerator pedal position sender. This means that when the accelerator is depressed halfway the throttle valve positioner opens the throttle valve by the same amount, the throttle is then approximately half open.

When the engine is running (under load) the engine control unit can open or close the throttle valve independently of the accelerator pedal position sender.

This means that the throttle valve can already be completely open even though the accelerator pedal is depressed half way.

This also gives vastly improved consumption and exhaust emission levels at certain load conditions.

The torque required by the engine can be produced by the engine control unit by optimising the combination of throttle valve cross-section and charge pressure.

It is incorrect to believe that the "EPC" is comprised of one or two components only. The EPC is a system, which is comprised of all components which have an influence, control or monitor the position of the throttle valve, e.g. the accelerator pedal position sender, the throttle valve control unit, the EPC warning lamp, the engine control unit.
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for second transporter try with lambda and will work

for second transporter try with lambda and will work

Thanks for the tip about Lamba probe. I have already changed this but made no difference. It looked to be not very old. I disconnected it and it seemed to be a little better. But fitting a new one did not fix it. Sorry I should have mentioned I tried this already. So still pulling my hair out on this one. But I do thank you for your advice lunar-nec

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[quote='kanon' pid='106039' dateline='1357235125']
Hi,

1. If petrol ACU engine then read:

› Transporter 1991 > › ACU AET API AVT › Engine, mechanics › Fuel supply system ›
Checking electronic power control (EPC)
Function of EPC system

Thanks for your tip. It is 41 degrees here today. Very hard to work in these conditions. I will check this on Monday after the weekend and see if we have some result. But I think blocked cat converter may be the problem. Another thing I did not think of.

Edub

Now we do not have enough information...

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