vectra c 1.9 cdti 150ps auto fuel pressure problem
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  1. #1
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    Default vectra c 1.9 cdti 150ps auto fuel pressure problem

    Hi, guys.

    I bought the car a couple of months ago as a non-starter.

    It was showing high fuel pressure on starting with Opcom and the ECU was cutting the engine. I fixed this with a metering valve on the HP Pump and it cured the car.
    However the car is cutting out randomly when idling and when on overun and is a bit dangerous when cruising etc.. It starts straight away after this.

    I have recorded live data with Opcom and all I can see is fuel pressure fluctuating and not very stable until the pressure drops too far from the required pressure requested by the ECU.
    So it certainly looks like a fuel pressure problem.
    this is the newer fuel rail with only one sensor on it, could it be this?

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    Default

    Do leakback test on injectors, welcome to dk the wirlds best website.

    if you dont have any kit, look on youtube

    Was Banned For Being Certifiably Insane and Stupid

  3. The Following User Says Thank You to Meat-Head For This Useful Post:

    Gav44 (3rd December, 2017)

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    Injector leak test or fuel tank pump must be 2.5 to 3.0 bar you dont have a fuel... first fuel filter second injector leak and third fuel tank pumpe

  5. The Following User Says Thank You to Jazzer92 For This Useful Post:

    Gav44 (13th December, 2017)

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    UPDATE

    I checked live readings of the injector deviations with Opcom and all seems to be ok. injector1 = -0.5 injector2 = +0.3 injector3 = -0.6 injector4 = +0.6

    Since cold weather the intank fuel pump seems to be noisy, although the car starts first time it stalls randomly after a short time but always restarts straight away.

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    Do you have any fault codes?

  8. #6
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    Quote Originally Posted by autoden View Post
    Do you have any fault codes?
    Yes 2 codes regarding low fuel rail pressure and 1 tank level sensor high input.

    I can clear the fuel pressure codes but the tank level sensor one is not possible and its always present

    btw my fuel gauge has never worked since I got the car, maybe best to whip the back seat up and check the in-tank pump and fuel level sensor
    Last edited by Gav44; 13th December, 2017 at 07:42 PM.

 

 

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