TDCI leak back test

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TDCI leak back test

Postby LEGACY7770 » Sat Feb 16, 2013 7:46 pm

Hello All Did a Leak Off Test On A 2004 Transit 2.0 TDCI Today. Owner Said That Under Hard Acceleration That The Engine Will Cut Out Or Switch To Limp Mode.
Went For A Test Drive And Sure Enough 5th Gear 3000RPM Engine Dies Or Goes Into Limp.
Leak Off Test Showed All Injectors 25Ml After 2 Mins At 3000 RPMs Looks High To Me?????
What Do You Think The Normal Leak Back Is???
Steve
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Re: TDCI leak back test

Postby Avdr » Sat Feb 16, 2013 7:48 pm

Never concern myself too much with the actual volume, providing its not through the roof. Sure its not the usual VGT issue?
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Re: TDCI leak back test

Postby Robski » Sat Feb 16, 2013 8:03 pm

LEGACY7770 wrote:Hello All Did a Leak Off Test On A 2004 Transit 2.0 TDCI Today. Owner Said That Under Hard Acceleration That The Engine Will Cut Out Or Switch To Limp Mode.
Went For A Test Drive And Sure Enough 5th Gear 3000RPM Engine Dies Or Goes Into Limp.
Leak Off Test Showed All Injectors 25Ml After 2 Mins At 3000 RPMs Looks High To Me?????
What Do You Think The Normal Leak Back Is???
Steve


DTC's ?

P0251 per chance ?
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Re: TDCI leak back test

Postby LEGACY7770 » Sat Feb 16, 2013 8:18 pm

Hi Guys Codes Are --

P1211

P0380

P0191

P0251

Thought it was the usual TDCI thing low pressure under load cutting the engine.

just thought it's loseing pressure from the injectors.

it's had a new drv value on the back of the pump
New ford fuel filter
Scoped everything in sight all ok
leak back test all 25ml 2 Mins at 3000rpm
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Re: TDCI leak back test

Postby Robski » Sat Feb 16, 2013 8:21 pm

scan tool ? Maxidas no doubt ??

Desired FRP & actual at time of fault ?

Pump proof test ?
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Re: TDCI leak back test

Postby LEGACY7770 » Sun Feb 17, 2013 6:09 pm

Hello robski.

When i do a pump proof test will i need to undo the injector wiring ?

if i connect my scope to the FRS at the same time as i do the test i can see if the valve on the pump is holding pressure ? Say on a 30sec screen ?
1050Bar after 5 second crank time is this right ?
And i have a maxidas and a launch i used my x431 on the transit in question.

Thanks for the help so far mate steve
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Re: TDCI leak back test

Postby Robski » Sun Feb 17, 2013 6:38 pm

1050Bar after 5 second crank time is this right ?

Post the capture, that's too long for my liking, it should hit a high pressure (voltage) in less time than that.

Desired FRP & actual at time of fault ?

This question still stands....... :?:
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Re: TDCI leak back test

Postby LEGACY7770 » Mon Feb 18, 2013 5:13 pm

Sorry mate i haven't done the test yet it's a mates van i dont want to lumber him with a bill for injectors then it does not cure his problem.
Will check desired and actual FRP at time of fault tomorrow
Do ineed to remove the injector wiring when i perform the pump proof test????? :? :?

thanks again steve :D
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Re: TDCI leak back test

Postby Robski » Mon Feb 18, 2013 6:58 pm

check PM's ..........
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Re: TDCI leak back test

Postby LEGACY7770 » Tue Feb 19, 2013 3:13 pm

Robski wrote:
1050Bar after 5 second crank time is this right ?

Post the capture, that's too long for my liking, it should hit a high pressure (voltage) in less time than that.

Desired FRP & actual at time of fault ?

Hi mate . FRP at time of fault was 132600kpa thats 1326bar FRP volatge was 1.01v?? but may have missed the max on this . will do a pump proof test autodata says 2v at 3000rpm so when i do the test i will look for 2v or above and holding. dont have a pico yet i have a vantage pro so no screen shots. what controls the imv mate the map / maf/ egr position as the egr value was stuck closed freed off the best i can but still 100% better no smoke whatsoever. the van drives all day sweet as a nut until you put your foot down in 4th 5th gear then it cuts out restarts right away. done the leak off 3000rpm for 2 mins 25ml in each pot.

This question still stands....... :?:
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