Attention Fuel Pump Installers

[tar baby]

so on the sender .. top view . bottom is feed . middle is return . top is vapor ..?

[Steve Wood]

here is a picture at the tank.   If you crossed the two lines (vapor and return0 coming from the front, there can be a problem.

Also, if you used the old hose and it is collapsed inside or kinked, it will cause a problem.  And then, there is the common problem-cheap fuel gauges that read strangely.

and, speaking of strange, your O2s do not reflect an abnormally high fuel pressure so that makes me wonder.  In fact, they look low which I mark down to an improperly adjusted tps.

http://www.vortexbuicks-etc.com/tps_adjustment.html

http://www.vortexbuicks-etc.com/basics.htm

[tar baby]

OK so I hooked them up just like the picture .. I am going to set the tps . and thank you for the help Steve I really  appreciate it

[daveismissing]

All 3 diameters are different?

[Steve Wood]

seems like one is necked down more than the other one...but I don't have any pics without the hoses on

[Steve Wood]

OK so I hooked them up just like the picture .. I am going to set the tps . and thank you for the help Steve I really  appreciate it

No problem...I am not sure you have a fp problem at this time because the O2s should be extremely high and the blms should be very low...so get the tps right and lets look again.  Be sure the car is at operating temperature so the O2 is reading correctly.

[TexasT]

Jim sent me this pic a while back. I'm assuming it is the stock hanger and it appears they are different sizes.

[aminga]

All 3 diameters are different?

Yes all 3 are different

[tar baby]

ok so after  adjusting tps and iac
02s 722-730 at idle
af 07
lb 44-47
batt 13.5
int 128
bl 118
clt 196
ats 94-97
r 900
tps 40
iac 12-21
 fuel pressure is at 52 psi with car running line off .

[Scoobum]

Fuel pressure was normal with the old pump. Are you absolutely sure you didn't reverse the two lines on top the tank as Steve suggested? I'd drop the tank and check for that...and also check the return line. It could be collapsed...or maybe the steel line it attaches to kinked. With the tank down...and the return hose unhooked I'd be tempted to hit the return line from the engine bay with compressed air to check for a blockage. Check your answering machine.

[Scoobum]

Steve, I talked to Tar Baby on the phone. The fuel presssure gauge is the same as the one with the old pump...so I have a hard time believing the fuel pressure gauge went on the fritz between fuel pump changes. Dan's dropping the tank and checking the lines...to check if they're crossed, kinked or collapsed. Says it smells rich...but he's running a cat. Told him to take it off and punch the honeycomb out.

[earlbrown]

seems like one is necked down more than the other one...but I don't have any pics without the hoses on

There's a few pictures here showing the different diameters and placement relative to the car's lines.

http://www.turbobuicks.com/forums/buick-v6-turbo-tech/54018-how-install-intank-fuel-pump.html

I really need to make an updated version that shows how to set the pump depth and get an extra 1.8 gallons over the sock instead of under it and a simple hanger mod that makes the fuel pump accurate and quick reading.

[Steve Wood]

is that a factory maf, or a translator?  It's reading a bit high for a factory unit

That might be caused by the rpm being so high.  What is causing that?

[tar baby]

I have reman maff .

[Steve Wood]

To get that high of idle speed...should be about 750 on the stock chip and about 800, I think, on most aftermarket chips...I am wondering if you have an air leak?   The iac's are good so the idle should be normal.  Throttle blade should be closed for all practical purposes at idle at normal iac settings.  This would be about a thread and a half showing on the adjustment side of the screw.