E36 328i PROBLEMS AFTER M50 MANIFOLD CONVERSION...(Fixed)

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  1. E36 328i PROBLEMS AFTER M50 MANIFOLD CONVERSION...(Fixed) 
    #1
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    fazz's Car Details
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    Evening folks. I picked myself up a M50 Manifold with a bigger throttle body and all the parts attached to it ready for the swap.
    So today me and a friend carried out the conversion, I think we connected everything back up the way it should of gone! Now the car won't idle, it just coughs and cuts out unless you hold the revs up. Also when you give it a hard rev it really struggles, almost like its being strangled.
    We have gone back over pretty much everything but cant what the problem maybe.
    Does anybody have any ideas please, I pretty confused right now and my car is out of action!!!
     

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    xXxStKxXx's Car Details
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    Definately an airleak somewhere,I guess you know that though...You'll have to check it again make sure its all together properly and try and spot where the airleak is
     

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    Quote Originally Posted by StK View Post
    Definately an airleak somewhere,I guess you know that though...You'll have to check it again make sure its all together properly and try and spot where the airleak is
    Think I'm going to have to strip it down and start again tomorrow, not looking forward to doing it again though
     

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    Quote Originally Posted by fazz View Post
    Think I'm going to have to strip it down and start again tomorrow, not looking forward to doing it again though
    bad news mate, nothing worse.this is supposed to be the fun part,haha hope you sort it.
     

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    Did you disconnect the battery to reset the fuelling?
     

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    Quote Originally Posted by fazz View Post
    Evening folks. I picked myself up a M50 Manifold with a bigger throttle body and all the parts attached to it ready for the swap.
    So today me and a friend carried out the conversion, I think we connected everything back up the way it should of gone! Now the car won't idle, it just coughs and cuts out unless you hold the revs up. Also when you give it a hard rev it really struggles, almost like its being strangled.
    We have gone back over pretty much everything but cant what the problem maybe.
    Does anybody have any ideas please, I pretty confused right now and my car is out of action!!!
    Is there a gasket between the manifold and throttle body?
    how have routed the breathers correctly? M50 and M52's run differently?
    1998 323i sport touring. HSD coilovers,M3 lsd,
    style 5 alloys,M52B28 conversion on M50 inlet manifold. 220bhp and 200lb/ft mmmmmmm lovely
     

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    if you already checked all the hoses (make sure you did), check for air leaks between the manifold and the head. you can do it with a carb cleaner spray, just hold the revs manually and start spraying along the intake, where it fits on the head. if there are any leaks, the revs should go up. hope it helps.
    There are only two products required to make the universe work properly: Duct tape and WD40. 


    If it moves (and it shouldn't): duct tape. 
If it doesn’t move (and it should): WD40.

    Everything else is just stuff.
     

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    You could send it to me and I will px it for one that has been re machined and converted to a like for like fit. This will definitely go straight on with no air leaks.

    drop me a pm if interested.

    When you say you have a bigger throttle body, what model did it come from? The 325 body is exactly the same size as the 328 body.
     

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    #9
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    Hi folks, sorry for the late update!
    Well the car is all sorted now, turns out a wire from the throttle body plug was not seated in place properly and was causing a bad connection! Luckily we found it before we stripped the whole thing out again!!!
    Car feels so much more responsive now, just pulls all the way to the redline so quickly, It's just getting a bit expensive in fuel because it's so much fun to drive now!!
    Thanks to all for the advice
     

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    #10
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    glad you sorted it out, mate!
    There are only two products required to make the universe work properly: Duct tape and WD40. 


    If it moves (and it shouldn't): duct tape. 
If it doesn’t move (and it should): WD40.

    Everything else is just stuff.
     

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