Fuel Pump Rewire= Running Rich?

[CyberDSM]

Hey guys, I read on the forums that dsms run pretty rich stock. I'm running pretty rich according to my pocket logger, like .98. Brand new o2 sensor. I've done the fuel pump rewire, and still have my stock pump, could this be the cause of my richness? I'm only running 15psi, should, un-rewire the pump?

 

[larryd]

the fuel pump rewire should not make your car run any richer as its not increasing the flow of your pump, its just making sure you pump has a constant flow.

 

[CyberDSM]

i see, thanks for clearing that up. Is there any way besides an SAFC to solve my richness?

 

[larryd]

you can play with the honeycombs in your MAS but thats not a suggested thing for 2g guys to do.

 

[NJGSX96]

If you want you can remove the lower HC and back out the screw so it is flush on the bottom of the MAS. Just be careful removing the HC as they are very fragile.

 

[CyberDSM]

I've heard lots of good and bad things about removing the honey combs. Mostly bad. Would I get any benefit from just backing out the screw?

 

[twistedtsi]

u will get high rpm readings for me i only back it off if the car feels as if it wants to shut down at idle

 

[DCJ98GST]

Hey I have the same problem. I think I am just going to get the S-AFC to lean it out. From what I read, dont touch the 2g mas!

I really wish I got the pocketlogger as my first mod, to see if it really was the rewire or not.

http://www.dsmtuners.com/forums/showthread.php?s=&threadid=24097

Also check for boost leaks b/c that will make you run rich too!

 

[TechT]

My 99 came with the A/F set screw already flush inside the MAS...I haven't played with the lower honeycomb yet.I have to fiqure something out.My car burns alot of gas.I have my DP grounded...Any other ideas?
List of my mods:
k&n intake
apexi N1
tps downpipe
free mods
hrc uppers(both) ic pipes
greddy lower ic pipe
greddy type s bov
joe p mbc
magnacore 8.5 wires
ngk plugs

 

[nine5raptor]

check for boost leaks...

 

[imboostin]

I was wondering if the fuel pump rewire helps out performance wise or if it is kinda preventative stuff?

 

[pneumo]

The rewire ( and bigger fuel pumps) prevent a loss of performance at WOT. If your fuel system can't keep up it will show up on the logs. The O2 voltage will drop as the rpms go up. Look for more than 0.10 volt drop, as some cars will have the O2 volts vary by 0.02 or so.

 

[EuroGSTSpyder]

For a 190pump will the rewire be needed or will it work as it should with the "stock" wiring?

 

[DrZiplok]

Rewire for best results.