Fuel Pressure and idle issues...

[Smokin_GN]

Well,

I read in a previous thread by a guy "Flaboy" that he is having issues when coming to a stop light, the cars wants to die. I have the SAME problem...vacuum drops to about 8 or less and wants to die, but MOST of the time catches itself and idles fine. when in part throttle all is good!

Now, I think its my pump because I starting knocking really bad recently, and taped my underhood FP gauge to windshield and went for a lil tune session to find out whats up...NO FP INCREASE WITH CORRESPONDING BOOST INCREASE!!

Has to be the pump right??? What you guys think...

Any and all help appreciated.

 

[crownvic96]

could be pump and/or fp regulator.

do you have a scanmaster or other tuning device? you probably would want to see what your IAC is set at for the car dieing problem.

 

[azgn]

could also be the vac line to the regulator....that would mess up the idle also if leaking

 

[Smokin_GN]

crownvic,

yea I got a scanmaster, and IAC is set fine...about 30 when at operating temps (160). Does run a little rich.

The AFPR is new...well about a year old (Accufab). I can adjust the fp, so I figure it wasn't that. Weirdest thing is that it didn;t raise 1psi of FP for every # of boost when I was out driving it.

I just figure its the pump...damn used 340m's! LOL

 

[Red Regal T]

I'd guess the pump. I just replaced mine because it was only going to 55 lbs at WOT. Hopped in my Red T and it bopped right up to 65. Replaced it with the one from Full Throttle for $100 shipped. Fixed my problem.

 

[pwhite]

mine was doing the same thing (not rising with the boost ) I t was the fuel pump . full throttle sells 340 s for $99.00

 

[Smokin_GN]

Thanks for the info/help everyone. New 340 pump on its way to me as we speak!

 

[TurboBuckeye]

You've already checked/replaced your filter right?