From 368 EFI to Q-jet - Page 2
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500, 472, 425, 368 Discussion, From 368 EFI to Q-jet in Cadillac Engine Technical Discussion; I'm going to look at 8-6-4 Sedan de Ville tomorrow to see if I can use some spare parts of ...
  1. #16
    Cerbera is offline Cadillac Owners Member
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    Re: From 368 EFI to Q-jet

    I'm going to look at 8-6-4 Sedan de Ville tomorrow to see if I can use some spare parts of that.
    That would be nice, thats for sure.
    I take it that the temp sense, map or Baro sensor wouldnt be that much different from a Seville.
    Also, does anybody know where or who might have an eprom for a 80 Seville 864?

  2. #17
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    jayoldschool is offline GM RWD V8 addict
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    Re: From 368 EFI to Q-jet

    80 Seville didn't have 864. 81 did. Rockauto has the computer, $100.

  3. #18
    Cerbera is offline Cadillac Owners Member
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    Re: From 368 EFI to Q-jet

    Ah. I see...No idea why I wrote that but I meant just an eprom for the normal 368.
    I was looking for the baro, map, temp sense etc and some other stuff.
    Not that he had any unfortunately.
    I also saw that the Rockauto had the ECM but does it come with the corresponding eprom?
    Just sent an email to ask if they know.

  4. #19
    Cerbera is offline Cadillac Owners Member
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    Re: From 368 EFI to Q-jet

    Does anybody have a list of breakers I can contact perhaps to find a manifold?
    I have tried Cadillac King and Cadillacs only but until now i have received no response from them at all.
    The situation is getting slightly critical as I'm expecting my first road tax bill of around 600 USD at the end of the month....ouch

    Edit: all the ECU's I found are all without the eprom so thats a bit of a dead end as well.....

  5. #20
    70eldo's Avatar
    70eldo is offline Cadillac Owners Connoisseur
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    Re: From 368 EFI to Q-jet

    In worst case scenario you need to sign off the car (afmelden). But I am sure you already know that.
    Did you contact the Cadillac Club for advise meanwhile?

  6. #21
    Cerbera is offline Cadillac Owners Member
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    Re: From 368 EFI to Q-jet

    No I havent contacted them yet but there is some progress.
    I posted an ad on our national marketplace and apparently there's one guy who has both the ECU and the inlet manifold, how about that?
    So I bought them both and hopefully they arrive some time this week.
    Now i just need to fiigure where to start with what, ECU first and see if it runs or start immediately with the transformation to Q-jet?
    We'll see.....
    70eldo likes this.

  7. #22
    Cerbera is offline Cadillac Owners Member
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    Re: From 368 EFI to Q-jet

    Well, in short I can say that I have been conned...
    The guy is a total fraud after I ran his name through Google. Of course I should have done this earlier as the chance of someone of having both the ECU and manifold is rather slim.
    But in the meantime I have decided to go with a stand alone system. I did some maths on trying to keep both of my cars but that just not possible.
    It also helps that our city council has a cash for clunkers program going so at least I can partly pay for the system by bringing the car to the junkyard.

  8. #23
    70eldo's Avatar
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    Re: From 368 EFI to Q-jet

    Quote Originally Posted by Cerbera View Post
    Well, in short I can say that I have been conned...
    The guy is a total fraud after I ran his name through Google. Of course I should have done this earlier as the chance of someone of having both the ECU and manifold is rather slim.
    But in the meantime I have decided to go with a stand alone system. I did some maths on trying to keep both of my cars but that just not possible.
    It also helps that our city council has a cash for clunkers program going so at least I can partly pay for the system by bringing the car to the junkyard.
    That really sucks! Sorry to hear that!
    I didn't know the cash for clunkers is still active in NL?

  9. #24
    Cerbera is offline Cadillac Owners Member
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    Re: From 368 EFI to Q-jet

    Nope not in general but Rotterdam has it at the moment and thats where i live
    But also other cities are at least thinking about if I'm not mistaken

  10. #25
    Cerbera is offline Cadillac Owners Member
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    Re: From 368 EFI to Q-jet

    Well back to the drawing board it is
    The guy who was supposed to do the installation of the stand alone system has backed out stating the cars wiring was to much of a mess and was not sure what would happen with the dash as well.
    Also he could not do it for the price we agreed upon as well.

    So, back searching for a manifold and a carb

  11. #26
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    Re: From 368 EFI to Q-jet

    Any luck with Koen from the CCN?

  12. #27
    Cerbera is offline Cadillac Owners Member
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    Re: From 368 EFI to Q-jet

    Well had a breakthrough yesterday
    sent an email to the guys of 500cid.com to see if a aftermarket edelbrock would fit (it doesnt)
    but they do have a inlet manifold available for a 368.
    Of course I'm pretty happy right now and I ordered a Qjet to go along with it as well.
    70eldo likes this.

  13. #28
    Cerbera is offline Cadillac Owners Member
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    Re: From 368 EFI to Q-jet

    Well everything is fixed now.
    The LPG system has been taken out and the inlet manifold and Qjet have been installed and the runs real nice. (seems to shift better as well somehow)
    The Qjet did need some modifications as the clearance between the manifold and the throttle lever was too small so if you'd fit the throttle cable the normal way it wouldnt turn fully.
    But that was resolved with some grinding and welding.

    I did something stupid however with trying to raise the rpm a little when the car is Drive (running too low)
    I thought i found the idle valve and turned it just a liitle bit but now the car surges while driving and idling in Park....crap
    Did find the correct idle screw later on so will try to get it sorted by next week before the mandatory re-certifcation of the car when you delete the LPG system.

    Will try to post some pics later on btw.
    70eldo likes this.

  14. #29
    Cerbera is offline Cadillac Owners Member
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    Re: From 368 EFI to Q-jet

    Hello.

    Here's the final update for now.
    The car has been re-certified officially so the final hurdle has been taken so to speak.
    No more problems (well almost haha) and just some driving to do.....

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