Page 1 of 3 123 LastLast
Results 1 to 10 of 23

Thread: Serious CEL issue :(

  1. #1
    After doing a lot of searching hoping to find this solution I still havnt had luck so to cut down on time I'm hoping someone can shed some idea and light on my issue

    Previous car issues random CEL triggers on startup car revs up to high so I turn off then next start everything's fine put it down to usual 3200gt temperament
    Next few drives CEL starts triggering mid drive but no driveability symptoms then will just turn off again as fast as it came on , I check everything before every drive oil pressure good, oil level good , battery full, All fluids fine.

    Anyway after a long nights drive of it running brilliantly really loving this car boost comming on strong no CEL for days I'm so glad I bought it then it all comes crumbling down the throttle starts to be a bit jumpy slightest touch gives more throttle than it should then the CEL came on I pulled over and checked all I could in the dark on the side of the highway 1hour from home, reset battery, did the 2min ignition and 5 sec throttle reset which usually cures the problem to no avail

    Current symptoms
    CEL on ignition won't disappear with any reset procedure
    ive checked the pedal pot signal 440-3200 from ignition to full throttle that normal?
    That's joined yellow and white wires separating did nothing to help problem
    I don't have any diag equipment can someone recommend the best for our cars or even anything that can help with error codes and possible erasing them?
    I would really appreciate anyone's advice and am really
    Hoping I can sort this myself before resorting to handing my car over to some stealership
    Car has a upgraded contactless TB built by the Maserati shed but when I emailed him he said he did the best he could with what he had so that didn't sound like a very good guarantee of lasting workmanship yikes

    Thanks in advance for anyone
    Helping and giving the time to reply
    Much appreciated 👍
    Previous rides
    3 charade turbos
    Series 4 rx7 turbo
    Mk3 single turbo supra 2jz conversion
    Mk3 single turbo supra 300kw Showcar
    Mk4 single turbo 500kw +100kw nitrous (beast)
    Modified lotus esprit SE 300kw
    2000 maserati 3200gt (current cleanup project)
    2014 Renault Clio Rs (daily)

  2. #2
    Senior Member allandwf's Avatar
    Join Date
    Nov 2011
    Location
    Forfar
    Posts
    5761
    You need to get the codes read, sounds like a Throttle body or pedal pot issue. If it's 2001 or later then any generic code reader will do the job. If not then not so easy, a trip to an indy may be needed. Unless you have the codes you will be clutching at straws and wasting time. When mine used to throw the odd CEL it was the Pedal Pot, never had an issue since it was upgraded to contactless. The Throttle body was changed later, just for peace of mind.
    60/75

  3. #3
    SportsMaserati.com Moderator Contigo's Avatar
    Join Date
    Dec 2010
    Location
    Newbury
    Posts
    14737
    Get Davy's pedal pot that cures all the issues with CEL's and holding onto rev''s etc...
    Phil

    "Una Maserati č una roba per pochi"

    Current Fleet: 4.7 GTS MC Shift with Larini Sports Cats and ASBO H-pipe , 3200GTA, Mk1 Golf GTI 1.8 , Eunos Roadster, Audi A3 TQS Track (Tracy) Toy.
    Past Masters: 3200GT, Quattroporte DS, BMW E61 M5, Audi RS4 B5 Avant, Audi RS4 B7 , Lotus Elise S1, Celica GT-4, Eunos V-spec, Subaru Impreza Turbo 2000, Peugeot 205 GTI 1.6.

  4. #4
    Senior Member davy83's Avatar
    Join Date
    Aug 2010
    Location
    Reef Island, Bahrain
    Posts
    1577
    Reading the codes i think is really quite important. It is not uncommon for the throttle body and the pedal sensor to have problems at the same time, and without reading the codes you cant really tell if its one problem repeatedly causing problems or several different problems. I think since you have said that the pedal sensor calibration has cleared the problem in the past it would suggest you at least have trouble with the pedal sensor. while joining the white and yellow wires is not the best idea long term it normally helps so the fact that does not help might indicate you have at least one other problem. The engine revving high at start up is not really a symptom of the pedal sensor problems it is usually a problem with either air leaks around the plenum or the magnets on the throttle body motors breaking up or just suffering dirt and corrosion. So i would try to get some way to read your error codes first off and start by looking just what is tripping the CEL, and whether its the same problem or several different ones. I know early on, on my car, i had problems with air leaks, pedal sensor and throttle body all at the same time and it was hard to sort out. and yes i can help with the pedal sensor if you need it.
    Current - 3200 GTA, Yeti, V8 Land cruiser,
    Previous cars - TVR Chimeara 4.5HO, TVR S2, 5.0l Mustang, Jag XJ, racing Hillman Imp.

  5. #5
    Senior Member davy83's Avatar
    Join Date
    Aug 2010
    Location
    Reef Island, Bahrain
    Posts
    1577
    sorry on your question of ways to read the codes, it depends on the age of your car, early cars are not ODBII compliant and have an older 2 pin port and you need adapters to read the codes. There is a thread here some where. On newer cars that have an ODBII port any diagnostic reader will work, there is also a separate thread some where on both hardware and software for reading codes.
    Current - 3200 GTA, Yeti, V8 Land cruiser,
    Previous cars - TVR Chimeara 4.5HO, TVR S2, 5.0l Mustang, Jag XJ, racing Hillman Imp.

  6. #6
    Quote Originally Posted by davy83 View Post
    sorry on your question of ways to read the codes, it depends on the age of your car, early cars are not ODBII compliant and have an older 2 pin port and you need adapters to read the codes. There is a thread here some where. On newer cars that have an ODBII port any diagnostic reader will work, there is also a separate thread some where on both hardware and software for reading codes.
    Thanks a lot for replies , unfortunately mine is the 2000 model needing adapter so I have some diagnostic equipment on the way, since it's undrivable and not a daily I will try and trouble shoot this at home as much as I can before having it towedand throwing away $$$$, are there any simple throttle body tests I can do to see if it's ******* without having to take it off and open it up? and considering it was fixed by Maseratished only 2 years ago contactless could it be so broken that it can only be fixed temporarily and require a whole new unit?
    Previous rides
    3 charade turbos
    Series 4 rx7 turbo
    Mk3 single turbo supra 2jz conversion
    Mk3 single turbo supra 300kw Showcar
    Mk4 single turbo 500kw +100kw nitrous (beast)
    Modified lotus esprit SE 300kw
    2000 maserati 3200gt (current cleanup project)
    2014 Renault Clio Rs (daily)

  7. #7
    Senior Member davy83's Avatar
    Join Date
    Aug 2010
    Location
    Reef Island, Bahrain
    Posts
    1577
    I think one of the accepted basic tests on the throttle body is to remove the main intake hoses and push the butterfly with your finger, it should move smoothly and return to the closed position as far as i remember. It is common for this movement to be rough or indeed sticking and this is often the source of the problem.
    Current - 3200 GTA, Yeti, V8 Land cruiser,
    Previous cars - TVR Chimeara 4.5HO, TVR S2, 5.0l Mustang, Jag XJ, racing Hillman Imp.

  8. #8
    Senior Member Trev Latter's Avatar
    Join Date
    Feb 2014
    Location
    Lowestoft
    Posts
    1043
    If your TB is already contactless, it may be one of the "other" issues that can occur. It could be a circuit board problem (fairly rare by all accounts) or far more likely, an issue with the magnets breaking up/covered in debris and causing the throttle butterfly shaft to jam. Easy way to check for the latter is to remove the pipework where it enters the TB, which is just a few jubilee clips and with the ignition OFF, gently push the butterfly to see if it has a full range of movement and operates smoothly whilst also returning to it's original rest position under spring pressure.

    With regard to Davy's pedal potentiometer, it's one of the best upgrades you can do, as it will also smooth out the throttle response a little and build in reliability.
    Maserati 3200GT (Loving it)
    Alfa Romeo Giulietta (Replacement for the 159)
    Suzuki Jimny (yes really!)
    Moto Guzzi V11 Le Mans (keeping the smoke in the wires since 2010)
    Yamaha TDM 900 (12 years and been everywhere on it).

  9. #9
    Hhmmm, so the throttle butterfly is a little sticky from closed to 20% open then nice and free but there is absolutely no pressure at all to return it to a closed position with ignition off but with ignition on it snaps back to closed,and for further info the right side sensor is magnetti but the left is aftermarket contactless by the looks .


    Thanks again everyone its very kind of u all to help out and it's great to have access to like minded enthusiasts to keep these awesome cars going
    Previous rides
    3 charade turbos
    Series 4 rx7 turbo
    Mk3 single turbo supra 2jz conversion
    Mk3 single turbo supra 300kw Showcar
    Mk4 single turbo 500kw +100kw nitrous (beast)
    Modified lotus esprit SE 300kw
    2000 maserati 3200gt (current cleanup project)
    2014 Renault Clio Rs (daily)

  10. #10
    Senior Member davy83's Avatar
    Join Date
    Aug 2010
    Location
    Reef Island, Bahrain
    Posts
    1577
    Quote Originally Posted by Twinturbo View Post
    Thanks again everyone its very kind of u all to help out and it's great to have access to like minded enthusiasts to keep these awesome cars going
    The power of the Forum! its good we could help, many of us know how daunting all of this can seem and a little help never hurts.
    Current - 3200 GTA, Yeti, V8 Land cruiser,
    Previous cars - TVR Chimeara 4.5HO, TVR S2, 5.0l Mustang, Jag XJ, racing Hillman Imp.

Page 1 of 3 123 LastLast

Posting Permissions

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