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Jamaican Yellow with a fuel pump problem

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Jamaican Yellow with a fuel pump problem

Old 01-08-2019, 02:38 AM
  #1  
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Jamaican Yellow with a fuel pump problem

So I replace my GTA s fuel pump and finally got it off to a body shop for repaint. With it gone I thought let's get the formula running. Only has 20-30 psi fuel pressure and runs like crap . I was pretty mad i have to do it all over again on this car however while digging around in the trunk removing subwoofer wires, I peeled back the carpet to find this...

Sheet metal screws

Poorly measured cuts

Crease from where it was bent over
now i don't know who the owners before me were but I certainly would have tried to make this cleaner if I was going to do this to a car.

Can any one on here make a solid suggestion on where to cut to either expand the hole past the previous treachery or what I could do to clean it up as it is. The other examples of fuel trap doors that I have found on here are much cleaner but started with smaller holes. I did this the old fashion way on the other cars but since this is already messed up... On a yellow 92 Formula too 😢


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Old 01-08-2019, 04:53 AM
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Re: Jamaican Yellow with a fuel pump problem

Unbelievable how many people are so eager to do this hack job. I don't remember it being nearly as common until the mid-2000s, now it seems like a lot of thirdgens are running around with a hacked trunk.

To be honest that one looks better than a lot that have been posted. If it were me, I'd clean out all the garbage, and either weld everything back together and grind it all smooth, or I'd replace the damaged steel. That is, if I were going to do anything more aggressive than tucking the carpet back down and forgetting I ever noticed it'd been hacked. You could enlarge the hole, add some beads as necessary for strength, or a reinforcement around the cut out, then devise a removable cover, but honestly I think I'd sooner restore it and live without the hole I'd never use.

Changing the pump every so often the right way, keeps the bolts and whatnot from corroding into place. I think I'd rather error on the side of taking everything apart once every dozen years than trying to work through a hacked hole.
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Old 01-08-2019, 07:50 AM
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Car: 1989-92 FORMULA350 305 92 Hawkclone
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Re: Jamaican Yellow with a fuel pump problem

That makes me sad. I saw a guy on FB posting that he worked at a dealership that let and promoted this type of "repair". ugh. I'll bet your sending unit tubes are cut up too.
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Old 01-08-2019, 07:58 AM
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Re: Jamaican Yellow with a fuel pump problem

Internet “how to” videos created the phenomenon of hack jobs Far worse than shade tree mechanics of the past.
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Old 01-08-2019, 01:56 PM
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Re: Jamaican Yellow with a fuel pump problem

Looks totaled to me, let me know how much you want for it.
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Old 01-09-2019, 04:48 AM
  #6  
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Axle/Gears: 3.42, 3.70 9Bolt, 3.23, 2.73
Re: Jamaican Yellow with a fuel pump problem

I decided to open the hole and see the work done. In fact there is just a hole. The fuel lines have not been cut, the pump is not stock but it still begs the question... Why cut up a rare car? The RPO code / storage box in the rear had a fuel pump relay so I assume the previous owner knew something was wrong. Distributor plugs and wires all new too. I'm betting the pump is a 305 tbi pump. Oh and when I pull on the exhaust to wiggle it loose. Well,




Had to get it out the right way anyway

it came loose.
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Old 01-09-2019, 04:56 AM
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Engine: LT1, VRE 383 LT1, L98, LB9
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Axle/Gears: 3.42, 3.70 9Bolt, 3.23, 2.73
Re: Jamaican Yellow with a fuel pump problem

Friggin spectra sp1114 pump. For L4 and 5.0tbi. it's a TPI, Shame on you previous owner 😠
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Old 01-09-2019, 04:58 AM
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Axle/Gears: 3.42, 3.70 9Bolt, 3.23, 2.73
Re: Jamaican Yellow with a fuel pump problem

If we're going to put the wrong parts in this car we might as well throw in a lm7 with a blower or a 90s LT5. I don't have a T-ram like on some of the threads i follow 😉
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Old 01-09-2019, 07:37 AM
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Re: Jamaican Yellow with a fuel pump problem

That poor car, wrong pump and way to small replacement exhaust. Glad they got cold feet and didn't cut the sending unit up!!
Time to find a SLP totl catback for it.
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Old 01-09-2019, 11:17 AM
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Re: Jamaican Yellow with a fuel pump problem

Originally Posted by Drew View Post
If it were me, I'd clean out all the garbage, and either weld everything back together and grind it all smooth, or I'd replace the damaged steel.
This would be my recommendation too. I have a base 92 JAMAICA (not Jamaician) yellow car and I have the hack, I was going to get a cut from another car and weld in the repair with my overhaul, but I ran out of time. One day, if I keep the car that long and paint it, I will weld in new metal.

Originally Posted by Big&BadGTA View Post
Internet “how to” videos created the phenomenon of hack jobs Far worse than shade tree mechanics of the past.
I would say that this is a good observation and probably why, that and places like Facebook where people are promoting it, and saying it's a safe thing to do when they have no idea what the implications are.

Originally Posted by 96BlownSSragtop View Post
Looks totaled to me, let me know how much you want for it.
I think you're right. Put me second in line

Originally Posted by legend71 View Post
I decided to open the hole and see the work done. In fact there is just a hole. The fuel lines have not been cut, the pump is not stock but it still begs the question... Why cut up a rare car? The RPO code / storage box in the rear had a fuel pump relay so I assume the previous owner knew something was wrong. Distributor plugs and wires all new too. I'm betting the pump is a 305 tbi pump. Oh and when I pull on the exhaust to wiggle it loose. Well,
With the sender being uncut, I think they oversized the hole so they were able to disconnect the lines and squeak the lines past the tank, uncut since there would be enough room at the front there
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Old 01-10-2019, 05:43 PM
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Engine: LT1, VRE 383 LT1, L98, LB9
Transmission: 4L60E, Astro T-5, A4, A4
Axle/Gears: 3.42, 3.70 9Bolt, 3.23, 2.73
Re: Jamaican Yellow with a fuel pump problem

New pump is in and it runs at 40ish psi. I will clean up the fuel door mess and seal it with seam sealer until I can restore the car.

Now the thread probably needs to move over to engine as my oil press drops to zero at warm idle and won’t go over 30psi. Trying oil pressure sender first.

Also the car is way down on power and stumbles when you come off the throttle. Maybe a vacuum leak? Ingnition module? Bad motor? 165k miles
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Old 01-10-2019, 08:57 PM
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Re: Jamaican Yellow with a fuel pump problem

Are the injs original?
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Old 01-10-2019, 09:13 PM
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Axle/Gears: 3.42, 3.70 9Bolt, 3.23, 2.73
Re: Jamaican Yellow with a fuel pump problem

They look original. I really can't know as the previous owner wouldnt tell me anything about the car.
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Old 01-10-2019, 09:16 PM
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Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Jamaican Yellow with a fuel pump problem

If they are the gray and silver Rochester units, I'd ohm check them cold and hot. I'd bet you may have a bad one or 2.
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Old 01-10-2019, 09:23 PM
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Axle/Gears: 3.42, 3.70 9Bolt, 3.23, 2.73
Re: Jamaican Yellow with a fuel pump problem



number 7 is black and silver the others are gray on this side.

Got the voltmeter out now
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Old 01-10-2019, 10:11 PM
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Axle/Gears: 3.42, 3.70 9Bolt, 3.23, 2.73
Re: Jamaican Yellow with a fuel pump problem

1:15.9 3:15.2 5:3.6 7:17.6
2:16.6 4:12.2. 6:17.0. 8:16.9

All cold readings right now
looks like two low ones. There are two newer injectors both in the 16-17 range, can they be too high?

Last edited by legend71; 01-10-2019 at 10:11 PM. Reason: Forgot something
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Old 01-11-2019, 01:47 AM
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Axle/Gears: 3.42, 3.70 9Bolt, 3.23, 2.73
Re: Jamaican Yellow with a fuel pump problem

I have some old LT1 injectors i could throw in for the time being, they all read around 13.
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Old 01-11-2019, 07:18 AM
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Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Jamaican Yellow with a fuel pump problem

Yeah, a new set would really be the way to go.
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Old 01-18-2019, 02:18 AM
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Axle/Gears: 3.42, 3.70 9Bolt, 3.23, 2.73
Re: Jamaican Yellow with a fuel pump problem

Originally Posted by TTOP350 View Post
Yeah, a new set would really be the way to go.
​​​​​​Took your advice, got a set of new smp f101 injectors cheap enough. All new plugs, New oil pressure sender, New oil and new air filter. It started right up had a high idle, I put it in gear and had a knocking sound put in back in park, checked the oil which was fine. Started it again and it ran great. Drove it around and it had lots of 305 power and now problems. I'll try driving it to work tomorrow and see how it goes.
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