hi there can any one help me? i have a 2002 307 that broke down one day and after new hp pump, presure regulator, lp pump, ecu test still wont drive more than a mile without breaking down
slt - was the p0230 an error code ?
Edited by Pugugly on 29/08/2008 at 21:05
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yes reset light car will rev on spot fine but drive down the road as soon asyou give it some, bang mil on p0230 code wait a minute will start up
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nikki
It's reasonable to assume that there's a fuel pressure problem. As you mention the low-pressure pump has been replaced; to your knowledge, is this a Bosch, not Siemens, system?
Has the leak-off rate of the individual injectors been measured?
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no its a vdo unit and have performed leak off test when car runs it runs perfect, the pump on the engine is a bosch one and that has been replaced to!, when car is running it reads 300 bar at idle in live data but the last garage that looked at it said its the ecu because it looses its feed to the fuel flow valve then the car stalls and will only restart when ignition has been left off for 20 seconds or so, in 30 mins the injectors leaked off about 100 ml of diesel
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Nikki, i'm no mechanic but if its anything to do with the ecu as you've been advised i will recommend these people as being very capable in the ecu repair business, they have repaired 2 MB ecu's that others either couldn't find fault with or considered scrap or wouldn't touch.
This page about pug ecu's may be of no use at all, but its worth a read..
tinyurl.com/5uq3nn
Have you heard of these people Screwloose?
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A VDO ECU...?
The fuel pressure regulator loses it's feed - are they sure? That comes direct from the smart fusebox? [Now they can go wrong...]
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sorry for the slow reply working this weekend, no it has a bosch ecu and has been tested by taymar electronics in devon, reprogramed to another car wich ran fine so that eliminates ecu, the pump in the tank is a vdo unit wich has been replaced to. it looses its feed to the fuel flow valve on the top of the pump not the regulator on the side(wich is new to) and was informed the feed came straight from ecu. what is the smart box ?, where is it and can it be tested. the car has been like this since xmas got thaat bad have bought new car but would like to fix if poss thanks
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nikki
That makes a lot more sense. [I've only ever seen one Bosch HDi ECU go down and that was on a Fiat...]
The valve on the top of the pump is the 3rd piston deactivation solenoid. That is fed from fuse 4[?] in the smart [engine bay] fusebox - on a direct feed from the ignition switch.
That solenoid can't cut the engine; but have you considered an ignition switch fault? [Or a faulty fusebox?]
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is it possible to banger wire this to test or does it return signal to ecu ? or whats the best way to test
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Bodgery is to be avoided at all costs - the results are totally unpredicatable on such a horrendously-complex system.
Testing is the way to go. You claim loss of feed to the 3rd piston solenoid; double check that. It's feed wire is probably code 7313 [it's ECU pulse-earthed return is 1224.]
If 7313 loses feed; then check the relevant fuse. [See handbook; they move around.] If the fuse goes dead key-on; then suspect ign switch. If it doesn't suspect wiring.
What engine code is this one? RH - what?
Edited by Screwloose on 31/08/2008 at 21:28
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i think the engine code is rhy
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hi can any one help me tryed everyting still p0230 after 1 mile
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So what results did you get from those tests?
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i have no handbook but ave checked fuses and all ok checked and dont know how to check earth pulse i have a multimeter. couldnt it be the ecu stoping the feed becuse of p0230 fault
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Then lets go back a step; you say that "the valve on the top of the pump loses it's feed."
How did you test that and we are talking about the HP pump on the engine aren't we?
If so; that valve does not get it's feed from the ECU. It gets it's 12v feed direct from the key switch through a fuse. The ECU earths it to control it.
The valve itself is unimportant and won't stop anything working; but the possible loss of a main feed is crucial.
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yes the top of hp pump local garge told me this so i had ecu tested by taymar electronics all ok. can i test this by removing cowlin and testing feed from back of ignition.
if i conect multimeter it looses feed p0230 car stalls the when milage goes off car will restart am working today but will folow wires tonight is it likely to be in fuse box under bonet thanks for the help
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when the milage goes off car will restart
Huh? What that referring to?
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hi have tested feed ignition on no fed to pump when running 14v in about 3v out but i dont think this is problem. when car cuts out it will not restart straigh away but if you turn ignition off and wait for milageto go off car will restart. if you reset light car will run fine on spot but when you go down road bang light on car stalled
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milageto
Can you describe what that means?
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on the speedo the digital milage display when that turns off about 2 mins after keys are removed car will restart, also i have noticed engine is less responsive and noisier before staling
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just ben reading another post verry simlar to mine a 406 which looses feed to lp pump and car stops and will only restart after couple of mins any more advice will be apreceated thanks nikki
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Exactly; the feed to the pump comes from that very same "smart" fusebox.
That's the point of confirming the failure of a main feed - it could be causing a lot of more serious things; the 3rd piston deactivation solenoid can't stop the car.
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yes i think the garage made bad diagnosis could the smart fuse box be faulty or could the car have wiring fault becuse all mechanial components have been changed. i am usualy good at fault diognosis but this one has me stumped.i am going to pull fuse box apart tomorow see what i can see and test feeds diecty from ignition traceing them into fuse box will let ou now what i find
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I wouldn't pull the fusebox apart; it's a coded, networked, ECU. They do fail, often from water damage, and PSA have changed hundreds under warranty - which does not mean that it's necessarily the problem with yours.
You are not using a system to diagnose the fault; that's why you are getting the run-around from this incredibly complex car. Do you know if the power to the tank pump stops just before the engine does? Have you even got a engine management wiring diagram?
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yes the power stops to the tank pump and no i have no wiring diagams just a cheap code reader
also and the cars sometimes runs on when key is removed from ignition
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Running-on suggests a fuel regulator fault or a rail pressure sensor fault.
You've got about as far as you can on this one with the means at your disposal - take it to a diagnostic specialists like Bosch or LSUK to find out why that feed is dropping out.
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