Gas Level Issue Help Plz , Thanks

1674 Views 5 Replies 4 Participants Last post by WookieNoiz, Feb 4, 2022

WookieNoiz

Discussion Starter · Feb 3, 2022

So I installed my ALM Stg2 hat a few weeks back... gas gauge worked perfectly before but ever since the install my gas gauge has been all fucky ( showing incorrect levels , showing Zero fuel , showing full when i know its not) . Originally I thought maybe the magnet had sucked the float switch down to it when they level got low and when i filled it up enough it lifted some , But no it def reads messed up outside the tank too . Anyone know if they sell just the level arm and wiring or is it pretty much deal with it or buy a new pump just to harvest the bucket and arm

Level switch arm in the fully up position and it's showing half a tank on the dash and 9gal on the aeroforce gauge display

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Lionheart_CHP

· #2 · Feb 3, 2022

Not wanting to hijack your post, but I've got a question too.

Ever since I installed my ALM hat (base version) I've had instances where the car turns over a long time before starting if I don't turn halfway and wait a couple seconds. Seems like before there was fuel at the ready but now I need to let it pressurize before cranking. Am I crazy or what did I screw up?

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Lionheart_CHP

· #3 · Feb 3, 2022

And wookie, I've had similar symptoms to yours on my rat rod that turned out to be a bad ground on the sending unit. May be apples to oranges with the Cadillac.

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random84

· #4 · Feb 4, 2022

More likely the sending unit lever has been caught up on one of the in-tank wiring harnesses or a secondary pickup (if you have it).

Very tricky to get everything lined up in the tank with magnets.

If you don't have a secondary pickup, check the wiring harness for intermittent ground on top of the fuel hat.

Struggling for fuel pressure? You'll have to pull the lid and make sure the feed hoses are fully seated and crimped tightly.

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07GTS

· #5 · Feb 4, 2022

put a multimeter on ohms and check the sender resistance should be maby 250-40 ohms if its like our GM over here, when u move it through its range wriggle it around and it shouldnt go much outside the resistance it should be at, so if its going open circuit or high and low when ur wriggling it in the same position then there is an issue with the contact or warn out

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WookieNoiz

Discussion Starter · #6 · Feb 4, 2022

07GTS said:
put a multimeter on ohms and check the sender resistance should be maby 250-40 ohms if its like our GM over here, when u move it through its range wriggle it around and it shouldnt go much outside the resistance it should be at, so if its going open circuit or high and low when ur wriggling it in the same position then there is an issue with the contact or warn out

Ill Have To Check That At A Later Time, I Put It Back In The Tank Late Last Night ...I Gotta Do The Startup Log And Road Testing On My New Injector Tune And Shoot It Back To My Tuner ... Sooner I Get it Driveable The Sooner I Can Get It On The Dyno

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