Thread: hard start issue... PLEASE HELP!!!

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  1. #1 hard start issue... PLEASE HELP!!! 
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    ok so here are the symptoms

    > weather the engine is cold or hot, or the weather is cold or hot, it makes no difference... when i start the car, it cranks and cranks for about 5 to 10 seconds then turns over. right away i have to put my foot on the gas (only for a second) to keep it running or it will stall instantly. after giving it a second on the gas it runs perfectly. no fluctualtin idle or anything. i dont even notice any loss of performance.

    > it did stall on me ONCE. after i just got off the freeway for about a 5 minute 75 mph ride. it started up the same way it has been. cranks for a few seconds then turns over.

    >the only code its throwing is P0420. something to do with emission threshold too high bank 1 i think, or something like that.

    > bought the car with 133xxx miles. now has almost 135xxx. although the odometer has those white lines between the digits which i know means it was altered. could mean a replacement cluster, could mean the guy screwed me. the only way to narrow down the real milage is carfax which im broke so... lol

    > i recently replaced the fuel pump with a cheap chinese ebay oem POS. also a cheap chinese made ebay MAF. the MAF threw a code and it has since disappeared after i replaced it.

    > i have collected from this forum a few posibilities... bad fuel pump, fuel filter, FPR, IAC, PCV, MAF, this sensor, that sensor, the other sensor, a combination of 652 different sensors (lmao). just wanna know how to test for all the posibilities cause i dont wanna just jump in and start replacing stuff and by time im done, have replace avery sensor, valve, relay, and regulator on the entire car.

    > your help is much appreciated

    Thanks!!!
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  2. #2 Re: hard start issue... PLEASE HELP!!! 
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    Check your fuel pressure during those 5-10 seconds of cranking.
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  3. #3 Re: hard start issue... PLEASE HELP!!! 
    Turbo is the way to go. BillBoost37's Avatar
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    A bad cat code may be telling you that the cat is plugged. Have it checked for backpressure.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  4. #4 Re: hard start issue... PLEASE HELP!!! 
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    Ok... I know there's a special tool for checking fuel line pressure but where do I hook it up at? I can prolly rent the tool from autozone or somewhere like that.

    Would the bad cat code cause my starting issue? It is original cat.

    Thanks!
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