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Forced Induction new walbro 255 pump, car does not start up on 1st try

Discussion in 'Powertrain' started by sean2sean, Mar 30, 2005.

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    sean2sean Member

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    new walbro 255 pump, car does not start up on 1st try

    i just recently installed a new walbro pump, and now when i try to start my car... it doesnt like to start up on the 1st try... via remote start... and sometimes when i do a manual start with the key... once in a while it will take me two or three times to start it up... anybody know whats up?

    thanks
    sean2sean, Mar 30, 2005
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    LoSx New Member

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    you may be flooding the engine..... happens to me cuz of my large injectors and coldstart..... not very often but if i let it die like 30 secs after it starts it takes like 20 secs of cranking ok less but you know what I mean
    LoSx, Mar 30, 2005
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    toyotaspeed90 New Member

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    yeah.... if you are running larger injectors this *could* be the problem.... try disconnecting (if there is one) the cold start injector....

    basically for the first 200 or so cycles of the engine the ecu actually enriches the fuel mixture quite a bit (has nothing to do with what the sensors are reading.... it's a set percentage increase in the ecu)..... that along with bigger pump/injectors and a cold start injector could be flooding it out..... if there is no cold start injector.... and if you have something like an emanage look to see if you are able to change or have an effect on the startup enrichments.....
    toyotaspeed90, Apr 1, 2005
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    vortex Well-Known Member

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    He's not running his larger injectors yet - just did the fuel pump change out. Also it seems like it just does it on startup - so its possible his o-ring on the fuelpump isnt seated properly or is damaged. This could cause the fuel system to basically dump the contents of the fuel line back into the tank and make the system reprime the fuel lines before a startup... eh just kinda speculating here so don't take it for gospel... all i know is when i did the injector upgrade on my corolla (before I did fuel pump stuff) the car took 2-3 tries to start while the fuel rail was repressurizing. Ever since, haven't had an issue.
    vortex, Apr 1, 2005
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    sean2sean Member

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    i went to home depot this morning and picked up another o-ring.... so on the output of the pump i have two orings instead of 1. the one from home depot is about 1-2mm thinner then the oem one. but nevertheless it works...

    when i put the new 0-ring in and reinstalled everything... the car would not start up... it would start then die... or not start at all... i took fuel regulator and found that the 0-ring for that wasnt seated properly..and fuel wasnt getting into the engine.

    i resteated it... and start up the car...

    and it works... one start and the car would start... good shit... lol...
    sean2sean, Apr 2, 2005
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    toyotaspeed90 New Member

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    um.... if it's from home depot there's a good chance it won't last long..... they aren't meant for fuel that i know of.... might wanna take it to an auto parts store
    toyotaspeed90, Apr 3, 2005
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    sean2sean Member

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    anybody else can confirm this?
    sean2sean, Apr 3, 2005
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    vortex Well-Known Member

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    sean, glad to hear it was what we thought. :)

    -- difficult to say on the rings -- i've done it before with fuel related stuff and haven't had a problem, hence why I said it would work for ya. However, if you ever do have an issue with it - try something from NAPA. I don't think you will have an issue - but just in case. :)
    vortex, Apr 3, 2005
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    toyotaspeed90 New Member

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    well.... as i've found with fuel.... it's always best to be safe about it.... i doubt you want something as simple as a $5 (or cheaper) o-ring to deteriorate and possibly cause a fire!!!
    toyotaspeed90, Apr 3, 2005
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    vortex Well-Known Member

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    heh - where its at it wont cause a fire - it'll just lose pressure and his car will cut off again. :)
    vortex, Apr 3, 2005
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    sean2sean Member

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    dude... that ring just cost me 26 cents... lol...
    sean2sean, Apr 4, 2005
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    Cuztomrollaz98 MAD VLAD!

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    haha well what do you know that wasn't so bad then lol
    Cuztomrollaz98, Apr 4, 2005
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