ttkresurfacing

iTrader: (2)

Recently I just threw two codes.. p0172 and p0175, both banks running rich. Changed out new maf, new plugs and wires, new fuel pressure regulator, and all new o2 sensors. Nothing has changed at all. Any help to pinpoint the problem would be wonderful. I have a '03 Hummer H2 6.0l, radix 112 running 6 psi, 42lb injectors,90mm tb with Dr. X harness, shorty headers, random technologies high flow cats, gibson exhaust, electric fans, Nelson tuning, NGK TR6 plugs.

Thanks alot,
Tim

WJ MARK

iTrader: (7)

My guess would be injectors hanging up, one of my injectors was acting up and A/F was jumping around too. I would check there 1st.

ttkresurfacing

iTrader: (2)

Did it throw codes for rich on both banks?

Thanks,
Tim

WJ MARK

iTrader: (7)

I don't think so but ive had those codes before, I think the tune was just dumping too much fuel. Alan tuned your truck correct? so it may be on the rich side to be safe.

ttkresurfacing

iTrader: (2)

Yeah it's been running great for about 2 yrs then all of a sudden....bam.

charcold-bowtie

iTrader: (10)

do you have a wideband

ttkresurfacing

iTrader: (2)

Yes.. it is reading from 10.0 to 20.0... would think it's only my guage but it throws the two codes also.

Thanks,
Tim

WJ MARK

iTrader: (7)

I would try putting my old injectors back in to see what it does.

ttkresurfacing

iTrader: (2)

Isn't there a way to check the injectors with a Tech 2?

Thanks,
Tim

charcold-bowtie

iTrader: (10)

yeah I cant remember what its called. It dumps fuel in each cylinder, then you start it up and it smells like **** from being way to rich lol.

injector balance test??