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Fuel Car running worse after gas fillup

  • Thread starter Thread starter AnthonyA1234
  • Start date Start date Apr 18, 2022
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AnthonyA1234

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Aug 17, 2020
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Apr 18, 2022
#1
  • Apr 18, 2022
  • #1
Recently purchased a 92 gt project car and Once I was able to get the car running I drove it to a mustang mod shop to get a misfire fixed and to get the car running well. I finally picked up the car today and it ran amazing until I stopped to get gas. After I filled it up the fuel pump now buzzes constantly. The car also jerks when cruising at low rpm around 2k. Also when letting out the clutch in 1st gear the car will jerk very aggressively if I don’t give it enough gas. My thinking is that the fuel tank is probably dirty and after I filled the tank completely (the first time I’ve done this since I got the car, it sat for 5 years before I got it running) the gas probably stirred up whatever crud was in the tank and clogged the filter. I plan on buying abs installing a new tank, pump, and fuel gauge sensor since I’m gonna be in there anyways. Do you guys think this could be it?
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
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Apr 18, 2022
#2
  • Apr 18, 2022
  • #2
Yes
 
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Potomus Pete

I'm still waiting for the fully nude shots
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Mar 7, 2019
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#3
  • Apr 18, 2022
  • #3
Yeh. Yes, and yes. Maybe get DryGas/Heet. I would get this stuff at Home Depot in the mower section called Mechanic In A Bottle. Worth a try, because for years guys are getting Foxbodies that have been sitting and putting gas in them and they do that.
 
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CAMTWO1070

Active Member
Dec 17, 2021
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Apr 18, 2022
#4
  • Apr 18, 2022
  • #4
All I know is if its rust that clogged the filter you better change the tank asap..

Rust is a micro abrasive and it can breakdown so small it can pass through the filter and do damage to your fuel injectors and also impregnate burnt rust onto the pistontops layering it on creating hotspots on top of the pistons...

One way to tell if its rust is to remove the fuel filter and let the debris flow out of the inlet side in a clean glass jar...the contaminants your working with will be evident..

Good Luck
 
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AnthonyA1234

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Apr 18, 2022
#5
  • Apr 18, 2022
  • #5
Ok so I’ll do that then thanks guys. What pump should I go with? I’m thinking just the walboro 155lph. Car has a cobra intake, x303 cam, some sort of aftermarket head, full exhaust, cai, and the stock 19lvs injectors. Car makes 275 to the wheels. Will the 155lph be good?
 

AnthonyA1234

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Apr 18, 2022
#6
  • Apr 18, 2022
  • #6
I think I’ll go with the 190lph just to be safe
 

AnthonyA1234

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Apr 19, 2022
#7
  • Apr 19, 2022
  • #7
So the car before I took it to the shop had light blue injectors which I can’t be 100% sure because I was never able to take them out myself but I believe they were 24#. However after I took the car to the shop they put the stock 19#. Are these injectors enough for my car and the mods and power it makes? Also if I get the 190lph pump does that pair with 19# injectors? And should I get a new maf that is calibrated to 19#?
 
M

Monkeybutt2000

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#8
  • Apr 19, 2022
  • #8
AnthonyA1234 said:
So the car before I took it to the shop had light blue injectors which I can’t be 100% sure because I was never able to take them out myself but I believe they were 24#. However after I took the car to the shop they put the stock 19#. Are these injectors enough for my car and the mods and power it makes? Also if I get the 190lph pump does that pair with 19# injectors? And should I get a new maf that is calibrated to 19#?
Click to expand...
Firstly,you need to verify what MAF sensor you have,that will dictate what injectors.
 

AnthonyA1234

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#9
  • Apr 19, 2022
  • #9
Monkeybutt2000 said:
Firstly,you need to verify what MAF sensor you have,that will dictate what injectors.
Click to expand...
How can I determine that?
 
M

Monkeybutt2000

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#10
  • Apr 19, 2022
  • #10
The MAF is on the intake tube right after your airbox. If it's aftermarket it should be printed what #injectors it's for.
 
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Dan02gt

mazing how much gas smell came from that tiny hole
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#11
  • Apr 19, 2022
  • #11
Like others have said, you need to verify your MAF calibration and injector setup. For an aluminum headed H/C/I setup like you have 24lbs injectors should be bare minimum with 30s being a better option. The 155 lph fuel pump will be fine.
 

AnthonyA1234

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#12
  • Apr 19, 2022
  • #12
Monkeybutt2000 said:
The MAF is on the intake tube right after your airbox. If it's aftermarket it should be printed what #injectors it's for.
Click to expand...
Ok so here’s some pics of my maf, the old light blue injectors and the new injectors. That maf looks stock so I think I’m good?
 

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Monkeybutt2000

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#13
  • Apr 19, 2022
  • #13
Yep,that's a stocker. The blue ones are 24#s. The car will run okay,since you already have the 24#s,I would just get a 24# MAF and run them. A 155 or 190lph will be fine.
 

AnthonyA1234

5 Year Member
Aug 17, 2020
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Apr 19, 2022
#14
  • Apr 19, 2022
  • #14
Monkeybutt2000 said:
Yep,that's a stocker. The blue ones are 24#s. The car will run okay,since you already have the 24#s,I would just get a 24# MAF and run them. A 155 or 190lph will be fine.
Click to expand...
The old ones that the shop replaced were the blue ones and the ones I have now are 19 pounds. So you’re saying I should put 24 pound injectors back in?
 
M

Monkeybutt2000

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#15
  • Apr 19, 2022
  • #15
AnthonyA1234 said:
The old ones that the shop replaced were the blue ones and the ones I have now are 19 pounds. So you’re saying I should put 24 pound injectors back in?
Click to expand...
Like I said,the car will run okay with the 19s,but it would behoove you to swap to the 24s.
 

AnthonyA1234

5 Year Member
Aug 17, 2020
671
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63
Florida
Apr 19, 2022
#16
  • Apr 19, 2022
  • #16
Monkeybutt2000 said:
Like I said,the car will run okay with the 19s,but it would behoove you to swap to the 24s.
Click to expand...
Alright so I’ll pick up 24 pound injectors. I was planning on getting a Anderson power pipe and a pro-m maf anyway so I’ll order that too and put in the new fuel tank and 190lph pump.
 

AnthonyA1234

5 Year Member
Aug 17, 2020
671
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Apr 19, 2022
#17
  • Apr 19, 2022
  • #17
Ok so I ordered the new fuel tank and a 190lph pump. I’ll see how it runs after that and then in a month or two I’ll get the 24# injectors and maf
 
M

Monkeybutt2000

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Aug 11, 2019
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#18
  • Apr 19, 2022
  • #18
AnthonyA1234 said:
Alright so I’ll pick up 24 pound injectors. I was planning on getting a Anderson power pipe and a pro-m maf anyway so I’ll order that too and put in the new fuel tank and 190lph pump.
Click to expand...
What happened to the 24# injectors that were on it?
 

AnthonyA1234

5 Year Member
Aug 17, 2020
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Apr 19, 2022
#19
  • Apr 19, 2022
  • #19
Monkeybutt2000 said:
What happened to the 24# injectors that were on it?
Click to expand...
When I took it to a shop to get the misfire fixed he said one of the injectors was stuck so they replaced all of them with the oem 19#
 

AnthonyA1234

5 Year Member
Aug 17, 2020
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Apr 19, 2022
#20
  • Apr 19, 2022
  • #20
You know I’ve also noticed the cars exhaust is popping a lot now on deacceleration and also the car will sometimes not start when I turn the key. Could this also be because of the fuel pump?
 
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