is my low fuel pressure my cause of bogging or hesitation?

[erollinc]

hey guys .... just got another 240 the other week and had some vac issues and once fixed, it ran great..... but now im getting severe bogging and sometimes hesitation throughout the power band, sometimes it will drive fine, sometimes it will fall on its face and not accelerate at all. well all of thee ignition components are new and after inspection of the plugs, its obviously running lean... checked the fuel pressure and im getting 29 psi with vac... is that enough to cause my lean condition? when primed key on it wasnt making hardly any pressure....im pretty sure the pump is crapping out, but b4 i spend 200 bucks on a walbro and fpr.... i thought id make a post... thanks

oh and i replaced the fuel filter with a z32 unit and the car drove the same.... the newish filter i replaced had some ugly greyish black fuel come out of the input side, but nothing super ugly.... my tank is probly trashed lol

[nissangirl74]

You probably need to drop your tank, clean it ,seal it, and replace your fuel pump and filter. I had this same problem with my Z.

*edit - this is what came out of my fuel filter


After the gas was drained out of the tank, it looked like muddy pond water.

[erollinc]

prectiate the reply.... like i said, the filter i replaced didnt look old at all and grey/dark grey gas came out the input... so we will see what the fuel pump sock looks like.... ill probly get to it next week, i just wanted some opinions if 5psi low would be enough to cause my problems?

[erollinc]

anyone else want to chime in on wether or not 5 psi low would cause this?

[moso]

yes 5psi would cause that.

[mofeel]

yea get a walbro 255 off ebay for 89 shipped and call it a done deal.

[erollinc]

thanks guys.. got a walbro and a fpr coming,... ill update the thread for search reasons after im done, hopefully itll run great....

[erollinc]

sorry to reply late.... installed the new walbro and megan fpr.... yep that was the problem... car feels great now....

[moso]

change the filter again, failing pumps often leave crap in the fuel filter. filters are cheap. enjoy your car!!

[erollinc]

you think even tho i replaced it a couple weeks b4 the walbro and fpr i should do it again??

[moso]

yes. a failing pump is falling apart inside.