Ive been having some fuel problems. Running lean under boost. I just thought my injectors were hitting their max duty cyle since im using my b16 injectors on my LS-Vtec set up (just for break in purposes). But even not under boost it still leans out in the upper rpms (on the interstate). Also ive been running a holley intank pump for sometime now. When we first put it in a year ago, you could hear it as soon as you started the car. Now you cant even hear it at all. Thats why I think the pump is going bad. When we had it on my old turbo kit it did fine but the longer I had it the more quiet the pump got. Tomorrow im gonna change the fuel filter and see what it does, maybe ill get lucky and its just a clogged filter. Thanks any info will be appreciated.

 

Try unpluging the fuel pump..and pluging it back in again...Mines was kinda like that for a while..and i unplugged and plugged back the pump, and EVERYTHING was back to normal...it amazing..after all the headaches and suffering we go through trying to find out whats wrong, its always something you lease expect...and so simple.....

 

bump

 

Ok I did a few more things today and no luck. First I re gapped the plugs some how they were gapped to big. Did that car quit spitting and sputtering under boost, but still ran lean . Next we changed fuel filters with a OEM one from honda. Still no luck ran lean once again. Next we started thinking that my home made check valves were causing it to run lean. So I borrowed my friends missing link and guess what, still ran lean. Ive been watching the air fuel and when you floor it it goes into rich until the turbo spools and once it begins spooling it drops into the lean. I even tried unplugging the fuel pump and hooking it back up. That didnt change anything. It looks like im gonna have to fork out the money and buy a new pump and try that out. The FMU seems to be working cause when u take the vacum line off and blow into it u can see the pressure rise a little bit. Well hopefully someone has an answer to my problem...........Thanks

 

anyone.............someone please help

 

ttt

 

So you are trying to run an FMU with an Intank pump!? ARE YOU CRAZY?

 

LOL!!!!!!!!!! I bought the kit used from someone in dallas and he said it worked good. It did work fine on my b16 set up. You think thats my problem. Also could this make my fuel pump go bad.

 

Why is that so crazy?

 

yea, everyone and their mother is running this setup, mostly the walbro 255 lph without any problems

 

Last time I checked, Holley/Walbro Intank pumps can NOT flow 100psi+ .

 

i heard with a fmu you need an inline pump thats what im using, but all depends on your calibration disks.,