popping at idle

92hb_hb · Post by **92hb_hb** » Mon Feb 05, 2007 9:01 am

i've had this symptom too.. i'm running a walbro, rc750s', and an AEM fpr.. I have a fuel pressure gauge on my fuel filter and it reads about 40-42 @ idle.. Is that about right? or should it be lower??

sometimes the popping happens, sometimes it doesnt..

Post by **Spunkster** » Mon Feb 05, 2007 12:14 pm

You may need to run the car slightly leaner or slightly richer at idle.

Shmaa · Post by **Shmaa** » Mon Feb 05, 2007 3:56 pm

40-42 is pretty good, pull the vacuum off of the fpr and check it, I try to keep mine a litte under 50psi.

if it is only doing it occasionally you can probably just richen up the idle a tad and that should take care of it.

Before I got a fpr my fuel pressure was over 60psi and I had to run like 12.5 afr's at idle to get it to stop poping.