OK...
This may seem relatively dumb to more experienced MPFI V-6 Camaro owners, however I still think I have a fuel pump issue... and have a MSD high pressure electric fuel pump ready to go inline.


Approximate flow is 43 gph (282 lb/hr) gasoline (specific gravity 0.788) @40 psi and 12 volts/5.4 amps. Has 3/8-in. hose nipple Inlet, 5/16-in. hose nipple Outlet. Includes 2 cushioned mounting clamps and 4 mounting bolts.


I'm getting 22# fuel pressure at the Schraeder (sp?) valve, just enough to get it started and idling for a few seconds... then it dies/stumbles at idle.

I changed the TPS sensor, IAC, computer, MAF sensors already.

Do you think this will work?
If so, where would be the best location for the electric fuel pump?

Thanks in advance for any/all help thay anyone can offer.

 

40 psi won't get you moving too far... max psi on a stock pump is 60 psi. I've heard that putting an external pump in, without taking out the internal pump, will work- fuel still gets past the dead inline pump, but I never found any helpful info on thirdgen.org on recommendations. So I wound up dropping the tank

 

TomP,
Do you recall the location of the pickup/fuel pump in relation to the top of the fuel tank?
Driver's side, dead center, passenger side ?

The access hole is getting cut this weekend, and I'd like to make the smallest possible size hole in the sheet metal.

Thanks

 

There is a reason I keep these pics handy. havn't needed them yet but its the super easy way.

 

There is lots of line n crap behind it so be careful. I actually welded up most of them seams real well. never realizing there were fuel lines 1/2in away. I welded every visible seam as them cheesy stock spot welds ever 2 inches suck.

 

Gumby, You are DA MAN !!
Those pics were JUST what I was looking to find... NICE !!!!!

:hail:

BTW: Ever been to the CCNWO out in Stryker? Ask me how I know about that place.

 

Plenty of family and friends have but I find lawyers are cheaper then forced vacation time. All its take is a bucket full of money, in OJ's case a truck load or two.

 

OK... I was pleasantly amused to find the access hole was ALREADY cut, in a similar fashion that GUMBY had showed in his 2 photos. Someone had obviously replaced the fuel pump at one time or another. D'OH !

I've cut all 4 fuel lines about 1" from the 90* bends w/ a hacksaw(didn't want to risk blowing the tank sky high) and got the fuel pump out of there.
The MSD fuel pump will flow a max of 125# of pressure (stated on pump), so I'm not too worried about this not working.

*** TECH ARTICLE HERE***
There are 3 wires going to the fuel pump and float assembly:
Purple - Gas gauge/level float
Grey - Fuel Pump positive
Black - Fuel Pump negative

Thanks for the support guys, and I'll continue to reply w/ updates.

Up the Irons.

 

Hehehe.. my '88 came with the same bonus prize. Still trying to figure out the best way to give up on getting the sheet metal straight and fabricate an access door.

 

import cars has nice access pannels in the truck. I know honda does for sure.

I don't want to jinx anyone but doesn't it seam that the cars that have had pumps changed, have changed them 2-3 times where other cars go forever on the stock pump.

I wonder if location has anything to do with it. You can go from city to city and find different laws that govern gas addtives.

 

hmmm the hondas have a access door already there that means they are planning on you having to replace it all the damn time..lol....i dont understand why anyone would cut up the back end of their car to install a pump that only takes about two hours to do anyway ........i was looking at a couple camaros for sale yesterday with my wife and one of em had the hole cut and the guy was bragging about it saying that it would make it easier to change if i had to next time ...i lifted the carpet up and the hole was there alright and nasty looking he had made a nice plate and installed an hinge on the back side and a twist type latch on the front of it the consept looked okay but he did it 3 years earlier and it was beginning to get the rust out effect going .....thats something to keep in mind when you go cutting up your car ...it may sound good buy everytime you cut a hole you are asking for a new place for rust to move into .....and if you bought a car with it in already id look into gettting some por15 and painting the inside and outside of the area that is cut and hopefully that will do it


needless to say we passed on that one..LMAO...

 

Plenty of cars have an access panel. My 325i has one and a few GM cars have them. W bodies, H bodies....... Although pulling tanks to replace FP's is easy money. 3.5 hrs labor for a job that takes roughly 45-60 minutes.

In my 325i, the tank would be harder to pull then an F body tank so the panel is neccessary.

 

i could see the necessity for a hole in your car if it was a 6 hour job to do or something for sure but like you said when it should only take 2hrs or less i dont understand the reasoning behind cutting up a car...

 

I've changed my pump twice by dropping the axle- and I'd never cut an access panel- but it's never taken me "just" 2 hours.

 

did you have any one helping you either time ??? if you have a friend help its not that difficult to do as long as you have all the proper tools its not that hard of a job

 

Nope, did it by myself, and yes I have the proper tools and know what I'm doing!

 

sorry i didnt mean to make it sound as if you dont know what your doing at all i didnt mean for you to take it that way man ..lol...i was just sayin that if you have a buddy to help you it shouldnt take too long to do ....

 

If this wasn't my 'daily driver', I might have reservations about "cutting it up"... however, I've already got a hot rod ('70 Camaro)... and this is merely transportation.

I know what you're saying though.

 

i know i can see if someone wants to make it easier to change the fuel pump if for instance its a race car or something that has to have the pump changed because it went bad inbetween rounds ya know but not just to make a 2-3 hour job easier .......just doesnt make alot of sense to me but its not my car so what ever every one else wants to do is up to them its their ride.. but i surely wouldnt buy one like that like i said in another post i looked at one a couple days ago that had this done to it and i just couldnt buy it it was starting to rust where the cuts were made and i just dont want to have to deal with another problem on a car in a couple years later that shouldnt have been there ya know...but thats just my opinion and like f-bodys everyones got one ....LOL...

 

In reply, I'm not trying to start the proverbial "pi$$ing contest"... however I have to disagree w/ the philosophy that an 'access panel' isn't the best way to go here.

First of all, these cars aren't '71 Hemi Cudas... they are 6 cylinder MPFI Camaros (horsepower-challenged).
Now, don't read me the 'riot act' thinking that I'm dissin' Camaros, because I am NOT. I have owned 9 Camaros in my time... and 3 of them have been 3rd Gens (the rest 2nd Gens).

With a sound mind, would you repeatedly want to drop the rear end down and everything else involved to do a 15 minute fuel pump switch out-in job ?

My brain and common sense SCREAMS... NO WAY x 20 !!

The access panel doesn't alter the structural integrity of the car... IF you reinforce the panel when you're DONE.

As far as the "it's going to rust out, blah, blah, blah"... I don't see that arguement either.

POR-15 will kill rust DEAD, period.

OK... end rant

 

the only problem with that philosophy is all honestly how often are you gonna be changing that fuel pump in that tank anyway most of the time the factory pump has lasted atleast 10+ years and if you replace it with a gm pump your gonna get the same reliability out of it so cutting a panel isnt really a time saver when you spend ( how many hours cutting and painting with por 15 and reinforcing the panel to only have to change it maybe 10 years later ) just doesnt make sense unless your running a race car like i said before you need to change it in a hurry between rounds at the track or something ya know ......and also this theory has been beat to death on other boards there are plenty that think its a good idea and equally as many that dont think its a wise idea ...i my self dont care for it and wouldnt buy a car thats been cut up for that purpose but thats just me ..lol....i dont believe it affects the structural integrety of the car at all unless you would go over board on the cutting .....but its just silly to do it for an easy job all honesty.....