car running VERY rich...

[Bob Kazamakis]

Alright so tonight i got an SES light and a code saying bank one running rich. my LTFT's are in the -18's to -20's. yea thats rich!

i figure it could be a stuck open injector or my O2 sensor but what do i know.

I replaced my O2 sensor probably 6 months ago with a Denso so i'm hoping its not that.injectors are stock with 103K on them.

any ideas?

Click to read more...

 

[SRT41320]

did you replace the pre or post-cat o2 sensor? what about temp sensor, tps, etc.? do they read good?

 

[PANDA]

did you change the IFR table back to stock after taking out the 42 pound injectors?

 

[SRT41320]

wait...its modded? ahhhh geez

 

[Bob Kazamakis]

did you change the IFR table back to stock after taking out the 42 pound injectors?

i replaced the "before" Cat O2 sensor. i dont have a Cat.

I never ran the 42# injectors. nothing has changed for months on the car. it just started acting this way last night. i checked all my injector plugs, my O2 wiring, and looked for anything out of the ordinary.

 

[SRT41320]

hmmm...sounds like either a map, tps, or o2 sensor...i went through a bad batch (3) of o2 sensors before...only lasted like 2 months a piece

 

[Ron Vogel]

Sounds like EVAP system. Car has a sensor in the tank, and when the EVAP purges, it goes way rich. Make sure all the connections are tight, and the gas cap is all the way on.

 

[Bob Kazamakis]

s are you talking about fuel pump connections Ron? what should i check out evap related? a loose gas cap would cause this? i havent gotten gas in 3 days or so. car started acting like this last night.

i tried resetting fuel trims after i checked everything over and still rich.

i dont think its my TPS as that usually fluctuates on the scanner and it was reading fine.

 

[Fish]

s are you talking about fuel pump connections Ron? what should i check out evap related? a loose gas cap would cause this? i havent gotten gas in 3 days or so. car started acting like this last night.

i tried resetting fuel trims after i checked everything over and still rich.

i dont think its my TPS as that usually fluctuates on the scanner and it was reading fine.

Yes the EVAP can cause this. My car is acting up now as well. I always click my cap at least 10 times. Others get annoyed. Hehe.

 

[Bob Kazamakis]

i'll check my gas cap in the morning.

 

[Bob Kazamakis]

well the gas cap was fine. would the evap solenoid under the hood cause it? i cant remember when you pull it off if its suposed to be closed or open. anybody know?

 

[AlwaysVTEC]

are u sure its not because you winterized?? lol j/k good luck finding the culprit

 

[Bob Kazamakis]

well i put regular blue washer fluid in so i'm no longer winterized....

 

[Bob Kazamakis]

ok so i'm throwing a P0172 system too rich and a P1133 HO2S insufficient switching bank one.

Looks like its an O2 problem. I read over on 3800pro that it could be a melted wire too. i'll have to check in the morning. I looked quickly last night and didnt see the O2 wires near the headers at all but it was dark. Its probably my O2 extension thats melted...the thing is like 2 feet long; its silly.

 

[Fish]

Where is the O2 bung on the paceshitters? I know my SLPs have it in the downpipe. However it stretches my extension to the limit so I know there isnt any slack touching the header.

 

[Bob Kazamakis]

Its on the Y connection, maybe 10" from the straight portion of the downpipe (part actually under the car)

 

[EmersonHart13]

Denso is a good sensor, it really should not be the sensor itself...

 

[Bob Kazamakis]

well i just pulled my O2 extension and it was near the headers and the outer coating is melted. the wires are stuck together too. I'm in the process of splicing in new wiring and i'll go from there.

 

[EmersonHart13]

Get some heat wrap for it and zip tie it out of the way....?

 

[Bob Kazamakis]

alright update:
still have the problem.

I replaced the bad wiring in the O2 extension and wrapped it with header wrap. its also zip-tied in place instead of just tucked behind the A/c lines.

LTFT's were still -22.66 at idle.

Pulled the Evap solenoid to see if it was clogged with charcoal or fuel and neither. solenoid was closed and clean of debris. vacuum lines from the evap to the TB look just fine with no cracks.

unplugged MAF and same issue. LTFT's -22.66 and then some while driving.

Unplugged O2 sensor and my LTFT's went to -14.xx but was still very rich. I assume the car goes into VE mode when its not plugged in right?

so any other suggestions? I guess i could go pick up another O2 sensor but i dont want to waste $70 if i dont have too.

 

[Lord Tin Foilhat]

you should make it pay the bills so its not as rich

 

[Mook]

heres a dumb question....you dont have like an aftermarket tb in there do you? the reason i ask..is when i had my gtp, i put a ported zzp unit on there and REMOVED the screen. my trims were at like -18, -22, etc...put the screen back in, problem solved...this is a bit far out there but its worth asking

 

[Bob Kazamakis]

stock TB with screen in.

 

[Bob Kazamakis]

dammit nobody carries denso's in stock locally.

 

[Poopshinanigans]

I say sell it, then let the next guy worry about it. Just make sure the codes don't come up before the sale and that you make sure that its no refunds.