Why am I running so rich???

[farmtruc]

like the guys said, but to be more specific.

make sure the injectors were tuned for, stock is 24lb, you upgraded to 28's, that'll make it run richer.
be sure the fp is set about 58psi. you'll get different opinions on this, but i like a constant 58psi of fp, not 45psi at idle and 58psi at wot, so for me, i leave the hose off the fpr.
be sure the maf isn't wet or dirty, that'll cause drivability issues.
the intake is throwing off the ltrims as well. be sure they are no more than -10 value, they are probably -20 to -25, if you're saying the truck is that rich and the pcm is ready to set a code.

your truck really doesn't have enough mods for an sd tune, but if the maf is bad, it might be a route to take.

good luck,

[jcfreeman0]

like the guys said, but to be more specific.

make sure the injectors were tuned for, stock is 24lb, you upgraded to 28's, that'll make it run richer.
be sure the fp is set about 58psi. you'll get different opinions on this, but i like a constant 58psi of fp, not 45psi at idle and 58psi at wot, so for me, i leave the hose off the fpr.
be sure the maf isn't wet or dirty, that'll cause drivability issues.
the intake is throwing off the ltrims as well. be sure they are no more than -10 value, they are probably -20 to -25, if you're saying the truck is that rich and the pcm is ready to set a code.

your truck really doesn't have enough mods for an sd tune, but if the maf is bad, it might be a route to take.

good luck,

I double checked with him and he did set it for the 28.8 injectors. The fuel pressure is at 58psi at idle (with the ref hooked up) When i rev the engine it drops to about 52 then back up. I'll check the MAF to see if its dirty when i get home. I did unhook the MAF and the TB last night and it runs the same hooked up and unhooked.

Now since i put that new walbro in it wont stay running either. (just put it in the other day to replace the MSD pt# 2225). If i keep my foot on the pedal just barely it does but wont idle on its own.

[farmtruc]

Sounds like the fpr is fine and set, the maf is good, tune is good.

Just needs some fine tuning.

With the ls intake and relocated maf, the tune probably needs to be tweeked, which is normal.
Plus, you're regulating the fuel better than factory, so that's one variable on why the truck is a tad rich.

Just have your tuner lean it out, give him the ltrim values, that'll help.