4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

Air / Fuel problem

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Old Feb 23, 2012 | 11:40 AM
  #1  
bopiela's Avatar
bopiela
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Default Air / Fuel problem

Hey everyone,

I got all the pipes connected, hoses attached, BOV, MAf, etc. Oh and then added new gas. Went to start it, it fires up but then stalls. The longest it stays on is a couple of seconds. Is this because the air fuel is so far off from a 3.6 non intercooled to a 3.12 intercooled set up? I'm hoping that's the issue and that I didn't do something else in the process...

Thanks for the opinions.
Old Feb 23, 2012 | 09:27 PM
  #2  
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No one??? Lol
Old Feb 23, 2012 | 10:20 PM
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To answer your question no. You're A/F is controlled by the MAF and the onboard computer while in open loop. Did you convert to a blow through setup? If so, did you get a new tune for it? Also, if you can post a picture of your engine bay. I may be able to just look at it and see what is setup wrong about it.

Last edited by Kerns; Feb 23, 2012 at 10:24 PM.
Old Feb 23, 2012 | 10:48 PM
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^ like kerns said, if you switch from draw through to blow through (which im almost positive u did?) Then that is why its not running long, mine did the same thing until my tuner put a base tune on it. The base tune was enough to get a short little first pull on the Dyno done which was enough to start tuning
Old Feb 24, 2012 | 03:32 AM
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That would be why then. I.did switch to.blow through style.
Old Feb 24, 2012 | 06:47 AM
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You need to get that base tune done....then you should be good.
Old Feb 24, 2012 | 08:35 AM
  #7  
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bopiela
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Thanks guys. That makes me feel better. I didn't realize it would effect everything that much. But that works! We will see when I can get the tune and everything done.
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