I need some MAJOR help determining JUST what the problem is w/ these electric intank fuel pumps AND the aftermarket inline fuel pumps...

Has anyone else gone through 3 or 4 fuel pumps in their 2.8L MPFI 3rd Gen. Camaro ?

Long story short...
I got the car a few years back... the fuel pump was bad when I got it... and when I went to replace it, the "access panel" had already been cut in the rear hatch area... leading me to believe that this car had intank fuel issues once BEFORE I got it.

I removed the intank variety of fuel pump in favor of an inline MSD efi fuel pump... I used the original HOT(+) wire from the intank setup (lengthened it) to work w/ the inline fuel pump (which was located mid-door driver's side).

That pump worked for about 6 months, but it died.
Fast forward to a month ago, when I bought YET another inline fuel pump (brand new)... installed it and it only lasted a few months... and get this, the car wasn't even a daily driver... it was sitting and started once and a while.

Does anyone know what is going on here ?

I have an intank fuel pump assembly coming from another board member... and, I'm going to take it back to the "intank variety"... once again, via the access panel route. Should I run another "Keyed Hot Wire" from the fuse block... ??

What keeps killing these fuel pumps ? This is REALLY baffling and frustrating to say the least.

Any / all help is GREATLY appreciated, thanks in advance for any help offerred.

-Metal

 

I myself have not had any problems with in tank fuel pumps.I would suggest that you should go back to the original in tank setup.The pump is submerged in fuel pretty much all of the time and actually keeps it cooler.I have no experience with in line pumps,but did you just use the original sending unit with it in the tank while using the inline pump?Maybe it is an overheating issue with these pumps?{just a wild guess}i would also suggest using a gm fuel pump,it maybe more expensive but when I purchsed and installed mine they came with a lifetime warranty.I have put one in my 95 z28 over 2years ago and have never had a problem since,and it is my daily driver.

 

Almost forgot,replace your fuel filter if you have not already done so.

 

Thanks cadman277, I'm going back to the in tank fuel pump when the parts arrive. I was using the stock in tank sending unit w/ the inline pump, making anything 'possible' at this point.

Fuel filter has been changed, and will be changed again.

 

What brand is the pump, some brands die all the time. once upon a time when i worked at autozone, i noticed that all the fuel pumps we sold were junk unless you bought bosch. i hope you have a pump with a lifetime warranty.

 

Like I said earlier,try to use a gm fuel pump.I have not tried bosch but that is a good name brand.I hope everything works out.

 

The eBay seller that I bought the fuel pump from is going to exchange it for a new one (the inline electric pump). I'll keep that one as a back up, because I'm definitely going back to the in tank variety once the parts get here.

Thanks for all the replies everyone !!

 

Thanks cadman277...
I'm going back to the GM fuel pump as soon as the parts arrive... thanks for the help !

-Metal

 

Replacing the wire may be a real good idea, when you have too small of a wire or maybe a wire that has been corroded then you build a lot of resistance in your wire, wich in turn will cause a severe voltage drop and making the pump really work hard. Have you checked you voltage at the connection to pump connector? It dosent matter which pump you have if you dont have enough voltage to make it work properly. I think you may have hit the nail on the head by pulling another power wire to it, also make sure you have it grounded really well. If you still have problems you may want to look at a Walbro pump/wiring set up, they even supply seperate wiring and relay to up the voltage to the pump. If you not familiar with theese pumps just do a search, I have found alot of members are running them. Good luck.

 

A severely coroded wire which would give enough of a voltage drop would be very warm or even hot. Which isn't uncommon for a fuel wire. However, the fuel pump would not work harder if it weren't getting enough voltage, it wouldn't work hard enough, which would be very obvious when you floor the car. Low voltage on an electric motor just makes the motor run slower.

 

Just a quick question here regarding the in-line fuel pump that you are using here, what is the fuel pressure rating of it? Most of the in-line pumps that I am familiar with only have about a 13 PSI max rating at best. The LB8 V6 MPFI system requires a fuel pressure of 37 PSI to 47 PSI to operate correctly. It could be that you are overtaxing that in-line pump.