Battling Erratic Fuel Trims

[superman07]

@superman07 I thought these had a filter that’s tied in with the pump or something g

There is a cloth filter I believe in the tank protecting the pumps. Do not have any idea what size they filter down to. There is also a conventional canister type quick disconnect under the car.

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[brandonalberd]

Alright man. I'll look into it. Not sure what it is at this point.

I've cleaned the MAF 3 times, checked for leaks and found nothing ( haven't smoked tested, just CARB cleaner ), got fuel I know from good Shell station, Throttle Position Sensors 1 & 2 are both where they need to be ( according to the nGauge ).

About all I can think to do is check fuel pressure/filter quality. I'm hoping I don't have an injector taking a shit but if it is luckily that's easy enough to replace on my own.

 

[RoadCone]

I know the shop had troubles with Bank to Bank fuel trims once. Dual feed lines into the fuel rails then dual feed to regulator fixed this issue.

 

[brandonalberd]

Yea I almost wonder if I just went ahead and went with a new fuel system if it would fix my issues, but then again I hate to drop that kinda money and still have problems haha

 

[kcc0521]

There is a cloth filter I believe in the tank protecting the pumps. Do not have any idea what size they filter down to. There is also a conventional canister type quick disconnect under the car.

Only one filter in the tank unless it is a GT 350. The GT does not have an external filter.

 

[brandonalberd]

Only one filter in the tank unless it is a GT 350. The GT does not have an external filter.

I thought this was what I had read. That it was an internal filter. Still, could that be replaced alone, or would that entail replacing the entire fuel pump?

 

[superman07]

checked the shop manual, and wow, no filter. Sorry for the fake news. I thought for sure it had one but just the 350 does apparently.

 

[brandonalberd]

So that probably means replacing the entire fuel pump correct?

 

[Tommy V]

So that probably means replacing the entire fuel pump correct?

I would check pressure first,and if possible drive with the gauge in the car so u can see pressure under looad.

 

[ahl395]

I would check pressure first,and if possible drive with the gauge in the car so u can see pressure under looad.

I second this

 

[brandonalberd]

Gonna go today to AZ or Oreilleys and see if they have the 3/8" fuel line adapter to run a sensor into. I know I can order one, but figure if they have one I can do it faster. I know Lund sells a sensor kit for the nGauge but, it's $100+

 

[ahl395]

Gonna go today to AZ or Oreilleys and see if they have the 3/8" fuel line adapter to run a sensor into. I know I can order one, but figure if they have one I can do it faster. I know Lund sells a sensor kit for the nGauge but, it's $100+

If you have to order, CFM Motorsports sells a fuel rail adapter that provides a 1/8" NPT port.

https://www.c-f-m.com/performancepa...er-for-2011-16-Mustang-GT-GT350-V6-845p98.htm

 

[brandonalberd]

If you have to order, CFM Motorsports sells a fuel rail adapter that provides a 1/8" NPT port.

https://www.c-f-m.com/performancepa...er-for-2011-16-Mustang-GT-GT350-V6-845p98.htm

https://www.glowshiftdirect.com/3-8-quick-connect-efi-fuel-line-adapter/

Found this one as well. I'm sure the CFM is better quality but who knows.

 

[brandonalberd]

Probably buy that CFM piece, or the Nitrous Outlet one. Then find a brass elbow to attach to the fuel sender. That way I can run it 90* back instead of it sticking out.

 

[Marvelous D S550]

Probably buy that CFM piece, or the Nitrous Outlet one. Then find a brass elbow to attach to the fuel sender. That way I can run it 90* back instead of it sticking out.

did you find a fix?

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