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Landrover Freelander TD4 2003 - Low on power, code P1190 - Fixed #

Posted by Phil Kingdon on October 21, 2010, 10:49 pm

Year of Manufacture *: 2003
Engine Size and Code *: td4
( Optional ) Scanner Used: solus
( Optional) Fault Codes: P1190

Hmmmm, may need a bit of help with this one, this vehicle arrived at our workshop running but very low on power, code p1190 present, fuel pressure issues, low pressure reading about 3.9 bar, measured voltage on centre pin on pressure sensor on rail, 2.7v running at 3500rpm, almost 1v low according to auto data.
Carried out leak off test on injectors, no. 4 seemed excessive when running, about 30% more than others, tried leak off just ignition on, some fuel leaking off in this test although very minimal.
Anyway we have now replaced 4 injectors, code promptly returned when driven, starts well, runs slightly unevenly.
Any help here would be appreciated, thanks, Phil.

Re: landrover freelander P1190

Posted by Mark Robins <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1448' width='330' height='300' border=0 style='border:none;'> on October 22, 2010, 8:50 am, in reply to "landrover freelander P1190"
Mark Robins

Phil, I read one of frank Massey's articles about a fuel pressure issue with these vehicles and there seems to be an up graded wiring harness fuel pressure sensor and "O" ring to cure EMI (Electro magnetic interference) issues, these are well known to Land Rover. I don't know if it applies to your problem but maybe worth a check.

Mark

Re: landrover freelander P1190

Posted by Dave Harney <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT2603' width='330' height='300' border=0 style='border:none;'> on October 22, 2010, 9:11 am, in reply to "Re: landrover freelander P1190"
Dave Harney

Hi Phil,
Is the low pressure pump working ok ?

Regards
Dave

You can trim a sheeps wool many times, but you can only fleece it once !

Re: landrover freelander P1190

Posted by Phil Kingdon on October 22, 2010, 9:48 am, in reply to "Re: landrover freelander P1190"
Message modified by board administrator October 22, 2010, 1:01 pm

Thanks for these posts, have heard about wiring harness, chap I know who worked for l rover recently said they used to pinch connector a bit tighter on pressure sensor on rail, he thought harnesses were unnessarsary....?
Is the O ring in the regulator on the pump?
thanks for help Mark.
Dave, good question, solus reads this at 3.9 bar, I have renewed the fuel filter (inner wing osr), and you can hear the pump running, it had enough pressure to create small leak off when not running, hence injector change, it also carried out self bleed sucsesfully and started well after injector change.
New injectors fitted now leak off evenly but not dramatically different from old ones.
Thankyou for all help so far, Phil.

Re: landrover freelander P1190

Posted by phil kingdon <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1433' width='330' height='300' border=0 style='border:none;'> on October 22, 2010, 2:02 pm, in reply to "Re: landrover freelander P1190"
Phillip Kingdon

According to info from landrover teccy and from other sources, there should be no leak off from these injectors in disabled state and cranking, these recon units do leak, about 1cm up leak off test tube with 10 sec cranking.
What do you guys think? Is this excessive leak off? Are these injectors knackered from the start?
Thanks for reading , Phil.

Re: landrover freelander P1190

Posted by Andrew West <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT5350' width='330' height='300' border=0 style='border:none;'> on October 23, 2010, 11:07 pm, in reply to "Re: landrover freelander P1190"

Hello Phil,
I usually measure injector spill with the injector wiring disconnected & cranking for 30 secs & have yet to see one that doesn't spill any fuel.On my measuring tubes I usually see 3-4(about the same height as you're getting I would think) graduations after 30 secs cranking & usually look for a difference between cylinders. Usually an injector causing a problem starting(not the problem you have) will spill off an obviously greater amount than the others. When cranking usually the high pressure should be around 250-280 bar & when held at approx 2000rpm, approx 700- 800 bar. You would expect to get a max of about 1450 bar viewing live data on road test at full load.
Your low pressure sounds ok at 3.9 bar , usually they are around 3.6-4 bar.
Have you got a better description for your code as I don't usually see the "P" code using Autologic.I will see if I can find time tomorrow to check the description.
I have yet to replace an overlay harness & have always managed to clean up the rail pressure sensor connections, tighten them & refit ok, but after also reading Franks' article in Aftermarket magazine, it does make me wonder whether there is more to replacing the loom, than just corrosion as the L/Rover TSB suggests.
I have had my suspicions about the quality of remanufactured injectors lately & have recently had an issue with some that tested fine twice(with the starting fault still apparent) & 3 out of the four have been fitted to other vehicles since with no problems(not by me), yet the starting problem was sorted when I fitted a genuine set of Bosch factory reconditioned injectors.
Hope this helps, Regards, Andrew
p.s It might also be worth checking to see if there is anything floating around in the tank, that could possibly restrict the pick up, but a pressure drop should be noticeable on dynamic data when road testing if this is the case.

Re: landrover freelander P1190

Posted by phil kingdon <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1433' width='330' height='300' border=0 style='border:none;'> on October 24, 2010, 10:11 am, in reply to "Re: landrover freelander P1190"
Phillip Kingdon

Have since been in touch with Electrotec, the firm that supplied these remaned bosch injectors they feel injector leak off described to be acceptable, I dont seem to be able to test high pressure side with solus, imagine that this would not benefit me a lot as it would either read percieved pressure as read through rail sensor, or actual pressure if this is low.
What I need is a guage capable of reading these sort of pressures with a connector suitable for rail pressure sensor thread.
Electrotec suggest testing the high pressure pump, pump off, send off, £132 please.
Ill have a look at code description tommorow. Thanks for post Andrew,
Phil.