Thread: Engine Fire

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  1. #1 Engine Fire 
    SE Level Member RedGrandPrix's Avatar
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    The Good News:
    I took everyone's suggestion and reran the compression test after Seafoaming. (Different gauge so the absolute values are different).

    1 178 psi
    2 181 psi
    3 179 psi
    4 180 psi
    5 183 psi
    6 177 psi

    Done with 5 cranks using starter motor, fuel/ign disabled, all plugs out, warm, dry, and throttle all the way open.

    The Bad News:
    I was removing the injectors yesterday and started a small engine fire. Pooled gas on the supercharger ignited. I put it out within 20 sec and nothing, except the fuel rail seems scorched. I checked all the electrical connectors and hoses. No melting. No damage.

    However, I used a half-second shot of an ABC (yellow powder) dry chemical extinguisher. The powder (mono-ammonium phosphate) is mildly corrosive if exposed to moisture (converts to phosphoric acid), specifically to aluminum. Before pulling the injectors, I blew all the powder from around the the injector port in the head 3x using cans of compressed air. I then cleaned the injectors with compressed air and mild electronics cleaner and swabbed the head ports thoroughly with a degreaser, before reinstalling the injectors. I cleaned the injector electrical connectors with MAF cleaner twice and water once. After reconnecting everything I hosed off the engine and transmission housing and took it for a spin (during which it behaved normally). The ABC leaves a residue when heated past 350 F and while I was very careful not to allow any in, I am certain some invariably found it way. I am hoping it was washed down with the gas and trapped in the oil, which I will be changing today now that I drove it 10 miles to circulate.

    QUESTION: Am I OK?
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  2. #2 Re: Engine Fire 
    Turbo is the way to go. BillBoost37's Avatar
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    My first thought is .. No, you aren't ok, but the car might be

    How'd you ignite fuel, was the key on?
    I drink..so consider that when reading my posts.

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  3. #3 Re: Engine Fire 
    SE Level Member RedGrandPrix's Avatar
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    haha. thanks bill

    Failed to disconnect neg. battery terminal.
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  4. #4 Re: Engine Fire 
    The Blue One blueguy's Avatar
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    ^^That'll do it there chief LOL
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  5. #5 Re: Engine Fire 
    I live here. GTPJOE90's Avatar
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    Always always always disc. Neg terminal thats rule number 1 when working on a car.... Lol
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  6. #6 Re: Engine Fire 
    SE Level Member RedGrandPrix's Avatar
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    Usually, im very careful and thats the first thing I do. First time, I get lazy and f*** it up, bad stuff happens. Do you guys think the small amount that got in there is gonna wreck up the inside?
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  7. #7 Re: Engine Fire 
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    Eh, phosphoric acid is is a relatively weak acid. I can't imagine a small amount of it doing much if any harm.
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  8. #8 Re: Engine Fire 
    SE Level Member Planeboy18's Avatar
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    Sounds like a pretty epic story. Should be okay though. Your internal combustion engine just wanted to become an external one. I would keep washing the engine off though every once and a while just to make sure though, but as ^^ said it is a pretty weak acid if college chemistry serves me right, so you'll be fine.
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