Citroen C3 8HY 2003 - Non start after wrong fuel, codes P1163 & P1168 #
Posted by Shaun Dale on May 12, 2014, 1:09 pm
Year of Manufacture *: 2003 Engine Size and Code *: 8HY ( Optional ) ECU Type: Delphi ( Optional ) Scanner Used: Multiscan ( Optional) Fault Codes: P1163 P1168
Customer fill his wife's car with petrol and drove it until it stopped. AA/RAC drained the tank, put in some diesel and attempted to purge the petrol remaining. Vehicle dropped off to a local garage who purged more petrol from the system. I was then asked to take a look. Whilst towing the car up to my workshop attempts to tow start the car showed that it was trying but clattering quite badly. Rather than destroy the thing tow starting it I thought it wise to do some basic checks first. Still loads of petrol contamination in the fuel rail, so I pulled more fuel through, seems like there's good diesel there now. Unfortunately the car now makes no attempt to start. Fault codes that were originally present were P0341 Cylinder reference sensor no signal. P1168 Fuel pressure control solenoid loop difference check implausible. P1207 Fuel pressure regulator current too high. P1163 No resetting by accelerometer, no periodic injector resetting. After my work and resetting the fault memory the code that returns is the P1168. I have removed, cleaned and checked the fuel pressure regulator solenoid for free operation. The P1163 appears to return if tow starting is attempted and the accelerator is pressed, I believe it relates to accelerator pedal signal implausible. The fuel pressure rises promptly to the target pressure and holds for some time. When cranked the engine makes no attempt to fire. Is it likely that the P1168 code inhibits injector operation? Or am I looking elsewhere. There appears to be no metal contamination of the injectors at their fuel unions. The trouble with a car of this age is how far to go before declaring it uneconomical to repair. Too cap it all the customer's wife is getting in the ear from his wife for killing her car so as a result he's calling me frequently trying to deflect her attention away from himself.I did tactfully explain that Diesels are not meant to run on petrol and that was not my fault.
Hi Alan, Will run on sniff, so valve timing is correct. Fuel pressure measured correlates with desired as mentioned in my original post(using live data anyway, I don't have any thing to confirm actual).Cranking speed is good. Was trying to go on a tow start but now makes no attempt, I know some vehicles seem to have bump start protection in them, can't remember which vehicle I found this out on.
Seem to be stuck in a "chicken and egg" situation with this one. I can see no injection pulses but when cranking the fuel pressure rises rapidly to 700bar the P1168 code is stored and then fuel pressure decays. I suspect either the fuel pressure is rising out of control due to a problem with the inlet metering valve or because the injectors are faulty and not drawing fuel. I think I have a very small window to see if injection attempts are made before the system shuts down when the P1168 code is registered. I now have a seperate fuel supply attached and have run clean fuel through the system. Any ideas please?
I am now using a Proxia tool on it. I find that the +AC voltage is at 13V (nominal battery Voltage, pretty much). I think this is the injector drive voltage, if so it should be around 80-90V surely? If this is the case I'm never going to get any injection, but why no low injector voltage codes? I'll disconnect the injectors to see if one is short to ground or similar.
>>> P1163 No resetting by accelerometer, no periodic injector resetting. After my work and resetting the fault memory the code that returns is the P1168. I have removed, cleaned and checked the fuel pressure regulator solenoid for free operation. The P1163 appears to return if tow starting is attempted and the accelerator is pressed, I believe it relates to accelerator pedal signal implausible. <<<
Please slow down and read the DTC it is not talking about the APP sensor.
The P1168 code is telling a story as well, please re- read your last post from the outside and see what stares out at you.
The Delphi system is special in certain ways and it may well be worth sitting down with a coffee and having a read up on it.
Hi Mark, Thanks for your reply. I have done a fair bit of research in the past on this and I did believe it related to the APP as a bit of poor translation. I'm sorry they may be telling a story but for the life of me I can't see it on this one.This is why I'm asking questions. The P1163 never comes up when cranking. Unfortunately I do not have time for any more schoolwork on this one. I will have to walk away and lose a load of time on it. I know I am not very familiar with this system I am much more used to Bosch, hence my reason for posting here! BTW I think coffee is vile, is tea permissible? If you have a strong suspicion please point me the right way. Shaun
Thanks Mark, Found some info last night (just sometimes it would be nice to switch off and watch a bit of telly and not bring the work home). Ok so now I've got the accelerometer on the back of the block detecting combustion noise, a development of a knock sensor I should think. Also I know now this system is likely to have a fuel pressure control solenoid on the end of the rail. That'll be fun to get at on this engine, can't even see the rail let alone the ends (even with a mirror).
Great, just one thing, I doubt this will have a pressure reg on the rail, it will probably control any pressure reduction via the control chambers within the injectors.
on May 12, 2014, 5:14 pm, in reply to "