Ungodly amount of fuel just to get it to run poorly.......

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a91what

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Apr 6, 2011
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I will have to take a look at these when i have time, if after the car has been run and it has sat to heat soak and will not start then you need to adjust the ASE, priming, ASE taper.
It is not uncommon for this to happen with the 94-95 mustangs as the IAT is in the airbox and does not normally see the 200* temps the engine bay will reach after it has sat for awhile.
 

Blown88GT

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Nov 13, 1999
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Probably has nothing to do with tune. I would look at the fuel delivery, i.e., fuel pressure.
BTW, there was no need to start a new thread on the same subject.
 

Gidgets_95gt

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Feb 18, 2020
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Thought it was a different subject kinda. Ie different problem than the idle with autotune. Sorry. The original computer doesn't do any better either. I was wondering if it was possible that all my injectors went bad at the same time seeing as I have no idea if they have ever been replaced. I will however check my fuel pressure when I get off work. The fuel pump runs strong and the filter is new.
 

Blown88GT

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Nov 13, 1999
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In many cases, what seem like different subjects all have the same root cause.
Fuel delivery could be fuel pump, fuel pressure regulator, injectors.
BTW, maintaining fuel pressure at idle can be strong, but under load can be weak.
 

Gidgets_95gt

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Feb 18, 2020
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I understand completely. Sorry for making the seperate post. The fuel pump runs but not pushing fuel. Going to drop the tank this weekend and replace the pump with a 255 lph and replace the hoses.
 

Blown88GT

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Nov 13, 1999
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Just don't resurrect a 10 year old post because it resembles your issue. (LOL)
Reference it, but don't add to it.
Steve is pretty busy with IBEW school, so sometimes I jump in to offer assistance, if it's something I've had experience with.
I have found that some of the replacement pumps don't have an anti-siphon valve. Only one FPR has it, Kirban. Without the anti-siphon valve, hot starts are difficult, resembling a flooded condition.
Remember, the only fuel item that Megasquirt monitors & controls are the injectors.
 
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Gidgets_95gt

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Feb 18, 2020
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The new pump is installed. Running great. No problem with hot starts so far but we aren't into really warm weather yet either. I have it running and idling pretty good I think. I was kinda curious though. I read something that said the lambda delay table should be changed under the auto tune options. Should it be changed and what is the best way to determine the correct variables for said table?