hmt diagnostic fuel pressure guage
 

well im too lazy/tired to redo the mspaint but ill redo it later on with better pictures of the damn thing

basically took a stock fuel line that goes from the fuel filter to the dampner and cut.. and shoved a barbed T fitting into it and put on a guage..

i do NOT plan to run this.. it planned use was diagnostic only.. the last thing i want is for this thing to come off while driving and have the car catch fire.. but in a controlled enviroment i figured why the ---- not?

maybe id feel safer about running it if i had bothered to get a real 5/16th T fitting ;)

instead i went to home depot and picked up a 1/4inch T fitting ;)

http://i33.tinypic.com/1554go3.jpg

basically went to the jy and got 2 fuel lines.. cut one of them closer to the fuel filter.. and one of em closer to the fuel rail.. so i can have longer hose..

shoved it into the 1/4 inch T fitting hose clamped the bitch shut.. whammo worked like a charm..

heres the link to the PRESSURE GUAGE
http://www.homedepot.com/webapp/wcs/...ctId=100111543

first thing i did was turn the key to prime the pump and checked for links.. a good 2 minutes.. held at 50psi just fine..

turned the car on and kept looking everything over.. seems like ittd hold fine as a permanent thing but i not even buk trusts buk.

i kept one of these on hand just incase ;)
https://www.t-mobilepictures.com/mya...dd0799d1b3.jpg

shitty picture of the setup
https://www.t-mobilepictures.com/mya...f3a50486a9.jpg

turn the key on and the fuel pump primes up to 50 psi (but for some reson my fuel pump never stops priming..)
https://www.t-mobilepictures.com/mya...fd237b7cd2.jpg


turn the car on and the fuel pressure settles in at 40psi
https://www.t-mobilepictures.com/mya...c6ba9b48ea.jpg

rev the car and the fuel pressure drops :(
https://www.t-mobilepictures.com/mya...ee1a863440.jpg

rev it higher and fuel pressure nearly cuts out.. car almost dies... 10psi.. ive managed to get it lower..
https://www.t-mobilepictures.com/mya...f57a65f6d5.jpg

so bad fuel pump? :(

Re: hmt diagnostic fuel pressure guage
 

There is a slim change of a bad FPR, but that looks like fuel pump buk-o.

Good diagnostics, grasshopper. Good job.

Re: hmt diagnostic fuel pressure guage
 

deffinately impressive use of the noggin. not the past buk that's for sure

Re: hmt diagnostic fuel pressure guage
 

how can i rule out the fpr 100% :(

Re: hmt diagnostic fuel pressure guage
 

I'd do it empirically.

Monitor FP with engine idling. Should be ~38 with vacuum line connected, ~41 with it hooked up. If your gauge is a psi or two off don't freak, but it beeds to change as the pressure on the vacuum port changes.

99% chance it's fuel pump tho.

Re: hmt diagnostic fuel pressure guage
 

what are the chances of a clogged pick up sock or w/e its called

hmmm

Re: hmt diagnostic fuel pressure guage
 

I would probbaly just pinch the return line off the fpr and see if your fuel pressure changes..That should tell u if its the fpr or fuel pump.

Re: hmt diagnostic fuel pressure guage
 

What do you think kills pumps? See also: fuel filter.

Re: hmt diagnostic fuel pressure guage
 

$7 for the Moroso 3/8" barbed fitting, $20 for a fuel pressure gauge, no need for two extra fuel lines.

Look under the "eu" on the strut bar

Attachment 14469

Re: hmt diagnostic fuel pressure guage
 

if i unplug the vac line to the fpr.. fuel psi goes up to 50..

if i plug it back in it drops to 40...