SLOAZZ95

94 EX W/Z6 motor. normal bolt-on's. i just put a b&m fpr and fp guage on. everything worked fine. the next day i put a gsr fuel pump on. after the fuel pump was put in it wouldnt hold fuel pressure after it was shut off. the ex pump is mpi, while the gsr pump is efi. could this cause the problem i am having or does anyone have any other ideas?????????????????????? help??????????????????

ek9vboi

i dunno, but the same thing happened to a friend of mines. he put a gsr pump into his dx with a b16. kept shutting off till he took it out and everything stopped

SLOAZZ95

Mine is running fine, it only happens when the car is shut off. ANYONE, PLEASE HELP!!!!!!

Doctor CorteZ

if it isnt holding pressure the FPR was installed incorrectly.

SLOAZZ95

it held pressure fine till i had the pump put on.

Doctor CorteZ

perhaps the pump is installed improperly...

SLOAZZ95

meaning like how, the hole sender just comes out then u take the pump off of the sender by taking off the 2 clamps and the hose, and then unplug. and the the exact oppisite to put it back on. any other ideas???? please????? could it be because the gsr pump is efi, and the civic is mpi????

Doctor CorteZ

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SLOAZZ94 &raquo;</TD></TR><TR><TD CLASS="quote">meaning like how</TD></TR></TABLE>

many ways , I dont know your mechanical ability.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SLOAZZ94 &raquo;</TD></TR><TR><TD CLASS="quote">could it be because the gsr pump is efi, and the civic is mpi????</TD></TR></TABLE>

perhaps you should think about what you just typed , perhaps you dont know what those acronyms mean....

SLOAZZ95

mpi= multi port injected
efi= electronic fuel injected

dantastic

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SLOAZZ94 &raquo;</TD></TR><TR><TD CLASS="quote">mpi= multi port injected
efi= electronic fuel injected</TD></TR></TABLE>

all 90+ hondas, acuras, are efi. did u buy ur gsr pump used? its probably bunk if it is used

SLOAZZ95

bought it brand new, its an ac delco pump. jus because i work for a gm dealer and it was alot cheaper. i got a new new pump, i am going to try that one.

Doctor CorteZ

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SLOAZZ94 &raquo;</TD></TR><TR><TD CLASS="quote">mpi= multi port injected
efi= electronic fuel injected</TD></TR></TABLE>

why would you think those are two entities ?

please tell me how after the pump has cycled off it is affecting your pressure ? your problem must lie in installation....

SLOAZZ95

ok i turn the car off and the fuel pressure instantly drops to 0. i installed the pump exaactly how the manual (actual honda manual) said to do it. when the car is running it s at about 39 to 42 psi.

axhandler

The fuel system is not supposed to remain pressurized after you turn to car off. It should drop to 0. Don't know about instantly, but mine drops to zero about 5-10 min after the car is turned off.

Doctor CorteZ

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by axhandler &raquo;</TD></TR><TR><TD CLASS="quote">The fuel system is not supposed to remain pressurized after you turn to car off. It should drop to 0. Don't know about instantly, but mine drops to zero about 5-10 min after the car is turned off.</TD></TR></TABLE>

wrong.

it should take nearly an hour to drop back to zero , 5-10 minutes is too quick.

axhandler

What would cause it to drop so fast?

So it is "correct" that the fuel system is not supposed to stay pressurized after the car is turned off...right?

Doctor CorteZ

could be anything , not saying you're losing performance or anything , just that idealy it should nearly an hour to completely lose pressure...

could be leak in return line , could be an old gas cap , could be anything really...

Doctor CorteZ

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SLOAZZ94 &raquo;</TD></TR><TR><TD CLASS="quote"> i just put a b&m fpr and fp guage on. </TD></TR></TABLE>

did you install the B/M correctly ?

I think this is where you should check FIRST.

axhandler

That's cool...yeah I'm probably off on the time it takes...never really sat there and timed it...I just know that is should drop to 0.

It would be funny is the gas cap went bad...

Doctor CorteZ

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by axhandler &raquo;</TD></TR><TR><TD CLASS="quote">It would be funny is the gas cap went bad...</TD></TR></TABLE>

they test them at our emmisions station up here , I actually know people that fail the test because of that...

axhandler

That's crazy....how can you tell if the cap is the weak link? Can you hear pressure escaping? See the fumes?

Interesting...

Doctor CorteZ

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by axhandler &raquo;</TD></TR><TR><TD CLASS="quote">That's crazy....how can you tell if the cap is the weak link? Can you hear pressure escaping? See the fumes?

Interesting...</TD></TR></TABLE>

they screw it to a pressure tester thingy , stupid Maryland.

jerseybrandon

There is also a valve in the pump that can fail and cause a drop in pressure.

SLOAZZ95

if it is suposed to go down to 0 then how come it takes hella days for my ride to start. i still think it is going down to low. i thought that a car holds enough pressure in the line to keep fuel in the line inorder to start the vehicle.

axhandler

When you go to start the car the fuel pump pressurizes the system when you turn the ignition to the "on" posistion.

Did you check the FPR and lines and make sure you have no leaks? Did you read Dr. Cortez's post on other possible problems?