hi all really hoping somebody can help I have just bought a p38 2.5dse and already have a serious loss of power around 3000rpm I know there not the most powerfull but definatly have issues it runs fine but when it kicks down and revs over 3000rpm it goes completely flat like the turbo just stops ive checked all internals of intercooler pipes as heard these are a common problem they seem ok also have tried another map sensor and my map sensor in another dse that's ok, it revs round lovely in park and have watched the turbo pipes swell is this normal? I have tried 4 different fault readers to check for faults but non have been able to communicate with the car is this normal? really scratching my head now and want to cry lol thanks in advance for any help given.
lack of power :(
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2.0_hippo
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Communication sounds like a connection issue with the OBD plug or ECU
rodntod
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try swapping the MAF sensor from the other car.Not a good idea to rev these autoboxes past 2000 in P or N.
Check the exhaust is clear all the way through in case you have a cat problem or a collapsed baffle.
Check the exhaust is clear all the way through in case you have a cat problem or a collapsed baffle.
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Is the pipe to the MAP sensor clear and sound and it's connection to the manifold clear? Sounds like a MAP sensor problem. Normal for pipes to swell.
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MAF has sod all to do with it on the diesel.
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OBDII readers won't work on the diesel.
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+1 to the map sensor/pipe....and the the scanner, the P38 diesel needs LR diagnostics or a dedicated Bosch EDC System....
Datatek
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Here we go again
The MAF can affect running. Much more likely a delaminated turbo pipe or the MAP sensor.You need diagnostics, generic OBD readers will not, as others have said, read the diesel ECU.
If you get it on diagnostics also check the needle lift sensor and the CPS on live data.
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Here we go again
You need diagnostics, generic OBD readers will not, as others have said, read the diesel ECU.
If you get it on diagnostics also check the needle lift sensor and the CPS on live data.
Bollocks Keith if you pardon the expression. MAF is there to measure air flow so the ECU can measure exhaust gas amount being ingested by EGR and control it. It DOES NOT CONTROL FUEL.
kevwill
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op2:
Datatek
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Not wasting my breath on this again Tony.:fencing:
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No neither am i. The MAF is for EGR feedback control. As required to meet level 2 emission standards. Whilst it's none function may cause in rare cases the ECU to misinterpret air conditions and in some cases cause running problems. It Does not control fuelling in any way.
As the OP said he had already tried swapping the MAP sensor with another one, I would have thought he would have real problems finding a MAF sensor anyway.
I thought it was either one or the other depending on the year, mine had a MAP sensor and no EGR and is an early 1998 DSE.
I thought it was either one or the other depending on the year, mine had a MAP sensor and no EGR and is an early 1998 DSE.
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As the OP said he had already tried swapping the MAP sensor with another one, I would have thought he would have real problems finding a MAF sensor anyway.
I thought it was either one or the other depending on the year, mine had a MAP sensor and no EGR and is an early 1998 DSE.
All have MAP sensors. Only mid 98 on have EGR and a MAF.
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Thanks for clearing that bit up for me Wammers, at least that is two parts that cannot go wrong on my Rangie.
The MAF measures air flow and under certain conditions the ECU uses this info to modulate the EGR valve to reduce the combustion temp by allowing exhaust gas into the manifold. The increase or decrease in airflow through the MAF is measured by the ECU so it knows how much exhaust gas is being ingested and adjusts the EGR modulation to suit according to engine temp, throttle opening engine speed. All this to reduce Nox emissions. The EGR should not be active on acceleration, but if there is a malfunction of the EGR modulator and the EGR valve is open on acceleration serious power loss ensues.
thanks for the input so far guys I checked the pipe to the map sensor all is fine there however didn't check the connection to inlet is clear so will check that in a bit to clear things up I don't have maf or egr I will also check the exhaust on the weekend anybody else have any ideas they are most welcome would it be a idea to check the waste gate actuater not sure exactly how they work on this though.
Datatek
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De-laminating turbo pipes, needle lift sensor, CPS, in tank pump, fuel filter to be going on with.
I have checked turbo pipes they are ok, how can I test the needle lift sensor, and the in tank pump? and what is cps? will be ordering air and fuel filter tomorrow. thanks for your time.
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CPS - Crank Position Sensor...
Needle Lift Sensor is built into No 4 Injector and needs to be checked on Diagnostics...
In Tank Pump can be checked by removing the Fuel line to the Filter under the bonnet and measuring the fuel flow - I think it is 180ml in 10 seconds, Wammers will know!
Also could be a clogged intercooler....
Waste Gate is controlled using a bypass from the turbo, when the boost increases it acts upon a diaphragm and opens the gate....could be checked to make sure there isn't crap caught on the gate preventing it from closing properly...
Needle Lift Sensor is built into No 4 Injector and needs to be checked on Diagnostics...
In Tank Pump can be checked by removing the Fuel line to the Filter under the bonnet and measuring the fuel flow - I think it is 180ml in 10 seconds, Wammers will know!
Also could be a clogged intercooler....
Waste Gate is controlled using a bypass from the turbo, when the boost increases it acts upon a diaphragm and opens the gate....could be checked to make sure there isn't crap caught on the gate preventing it from closing properly...
