Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: Fueling problems Z20LET

  
  1. #1
    Status
    Offline
    florinike's Avatar
    AOC Fanatic
    Join Date
    Dec 2006
    Posts
    308
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)

    Fueling problems Z20LET

    Hi guys. Back with another problem. From some time now, my car had some problems on high revs, at almost 6000 rpm there was an hesitation in the acceleration, but after i go trough that spot, there was ok.
    I started with the spark plugs, coil pack, the lambda sensor, injectors. Now, i got an Op-Com interface on the car and i found out the car was running lean at 6000 rpm. Untill those revs, the car is going on rich. Also, if i go easy with the throttle, the car goes until limitation at 7200 rpm @0.3 boost, if i kick down at 0.8 bar the car goes suddently lean.
    I checked untill now what i wrotte up and i was thinking of:
    -inverted fuel filter, with the bad direction of flow
    -blocked FPR
    -bad fuel pump.

    Is there anything else i should think of?

    Thanks for any help guys, cheers.
    Astra Coupe Z20LET EDS stage 2


  2. #2
    Status
    Offline
    vauxtillidie's Avatar
    AOC Fanatic
    Join Date
    Jul 2006
    Posts
    690
    Mentioned in
    0 Post(s)
    Quoted
    1 Post(s)
    sounds fuel related, id start with the things you mentioned
    2006 Astra VXR, Flame Red, 19's, AFL, Cruise Control, CD70 + Aux in, CID, Bluetooth, Powerfold Mirrors, DDS/TPMS, Sight & Light, Check Control, Speed Locking

  3. #3
    Status
    Offline
    smarty-turbo's Avatar
    AOC Fanatic
    Join Date
    Dec 2007
    Posts
    336
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    i have a spare fpr injectors and pump if your intrested

  4. #4
    Status
    Offline
    florinike's Avatar
    AOC Fanatic
    Join Date
    Dec 2006
    Posts
    308
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    @smarty-thx m8 but i am about 2500 miles from UK right now. If i cannot find them here i will PM you.

    @vaux - i know those are the things to look for, but is there any chance that another thing to do this? another sensor or something else? somebody from here sugested to look for split vaccums.
    Astra Coupe Z20LET EDS stage 2


  5. #5
    Status
    Offline
    vauxtillidie's Avatar
    AOC Fanatic
    Join Date
    Jul 2006
    Posts
    690
    Mentioned in
    0 Post(s)
    Quoted
    1 Post(s)
    yes check all vaccuum hoses and even boost pipes, i would have thought the problem wouldnt just be at 6000rpm though if it was split pipe
    2006 Astra VXR, Flame Red, 19's, AFL, Cruise Control, CD70 + Aux in, CID, Bluetooth, Powerfold Mirrors, DDS/TPMS, Sight & Light, Check Control, Speed Locking

  6. #6
    Status
    Offline
    smarty-turbo's Avatar
    AOC Fanatic
    Join Date
    Dec 2007
    Posts
    336
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    try cleaning your throttle body mate as i found that made a difference no probz i don't mind sending them out to you

  7. #7
    Status
    Offline
    florinike's Avatar
    AOC Fanatic
    Join Date
    Dec 2006
    Posts
    308
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    I cleaned the throttle body about 2 months ago, same stuff.
    I bypassed the rear BCS, was thinking maybe is because of that....
    Astra Coupe Z20LET EDS stage 2


  8. #8
    Status
    Offline
    smarty-turbo's Avatar
    AOC Fanatic
    Join Date
    Dec 2007
    Posts
    336
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    have you tryed the pedal test or tech 2 yet???try and stick some red x in your tank you might have picked up sum dirty fuel and sums stuck in a injector try changing you fuel filter

  9. #9
    Status
    Offline
    florinike's Avatar
    AOC Fanatic
    Join Date
    Dec 2006
    Posts
    308
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Pedal test gives some weird codes. If i drive normally, no code. If i drive hard, sometimes missfire on cillinder 3, problems with injector 3 and 4 , problems with oxygen sensor bank 1. The injectors i test them and they are ok. The lambda sensor is in parameters. The fuel filter has about 7000 miles, more or less. Could be the dirty fuel, cause we have some sheetty gas around here. I will change the fuel filter this weekend, and next weekend try another fuel pomp and another FPR.

    Thanx for the ideeas guys, much apreciated.
    Astra Coupe Z20LET EDS stage 2


  10. #10
    Status
    Offline
    smarty-turbo's Avatar
    AOC Fanatic
    Join Date
    Dec 2007
    Posts
    336
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    with the lambda sensor take the second 1 out and build the sensor out with washers and screw sensor back in thats the fault i had when i took all boxes and cats from mine and it solved the fault,the second sensor is reading too much gasses out of exhaust

Page 1 of 2 12 LastLast

Similar Threads

  1. Z20let possible over fueling problem????
    By astraz20300bhp in forum Turbo Petrol Engines inc. Transmissions
    Replies: 5
    Last Post: 17-02-2011, 20:14
  2. Z20let over fueling????? How many mpg????
    By astraz20300bhp in forum Turbo Petrol Engines inc. Transmissions
    Replies: 5
    Last Post: 17-02-2011, 20:11

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •