SR running deathly rich...:(

Post by **bassboost** » Tue Nov 25, 2008 5:05 pm

Hey all...so I have a BIG problem..

My sr is running pig rich..at idle and extremely light throttle AFR is between 13.0-16.0, full throttle or more than 1/4 throttle AFR is 10.0...I'm getting MAYBE 14mpg..usually about 160miles or so to 3/4 tank.

I'm thinking either o2 sensor or coolant temp sensor..?

Mods:Stock turbo 15psiFull 3in exhaust, gutted catCAI255 walbroFMICVent to atm. BOV300zx fuel filter

My car was running extremely well, and all a sudden just started guzzling fuel..it will rev up fine and go thru all gears, however i get a 10.0AFR reading..?

Any ideas?? Please help, id rather not see my SR spin a bearing

Post by **Koshin** » Tue Nov 25, 2008 6:12 pm

Post by **duffman1278** » Tue Nov 25, 2008 7:17 pm

I would try recirculating the BOV.

Getting an Aftermarket FPR.

And check your orings for leaky injectors.

Post by **bassboost** » Wed Nov 26, 2008 11:21 am

hmm...any chance a sensor went bad..cause it was running fine then all a sudden everything went downhill

Post by **boro drift** » Wed Nov 26, 2008 8:14 pm

bassboost wrote:hmm...any chance a sensor went bad..cause it was running fine then all a sudden everything went downhill

Try replacing the coolant temp sensor. One from a KADET will work.

Post by **bassboost** » Thu Nov 27, 2008 1:35 pm

Okay..just replaced coolant temp sensor, and thermostat too..it helped it a SLIGHT bit..still going to 10.0afr at WOT...?? I'm picking up a new o2 sensor tomorrow..

Post by **bassboost** » Sun Nov 30, 2008 7:31 pm

Okay, so i replaced my coolant temp sensor and o2 sensor..im getting a little better gas mileage, however still getting extreme rich readings. Also, the car feels sluggish, and every once and a while it will lightly buck..hahaha!!! I tried swapping a sr20de fpr, and still no change either...ideas anyone...?? I'm really afraid to spin a bearing

Post by **duffman1278** » Sun Nov 30, 2008 7:42 pm

Did you check for leaky injectors? fpr might be done.

Post by **bassboost** » Sun Nov 30, 2008 11:15 pm

how do i check for leaky injectors..i've tried 2 diff fpr's...

Post by **burntricer** » Sun Nov 30, 2008 11:22 pm

check your ecu for codes

Post by **the converted** » Mon Dec 01, 2008 3:30 am

bassboost wrote:how do i check for leaky injectors..i've tried 2 diff fpr's...

Unbolt the fuel rail from the manifold. Turn the key to run and look for fuel coming around the injectors.

Post by **bassboost** » Mon Dec 01, 2008 4:51 pm

Just unbolt the fuel rail? Or, fully pull it out of the manifold? And when you say turn it to run..like have the car actually running or the key position right before full ignition..?

Post by **the converted** » Mon Dec 01, 2008 5:22 pm

Unbolt it and pull it out so you can see the bottom of the injectors. turn the key to run, don't go to start, and look for any fuel leaking around the injectors.

Post by **burntricer** » Mon Dec 01, 2008 9:15 pm

PLEASE let me know if you find something out. my car is running pig rich too. and im trying to figure it out

Post by **bassboost** » Wed Dec 03, 2008 8:46 pm

Okay little update...

I took the MAF apart and cleaned it, as well as the throttle body..and when I took off the intercooler piping on the throttle body side I found that the previous owner cut a slit in the pipe so it would fit snug in the old battery tray!!!

So, I took the piping out, cut it in half and put a silicon coupler there and tightened the hell out of it. Car seems to be running extremely well now. I just need to turn my boost controller down a lot to get a more safer reading at higher rpm

I'll keep everyone posted

Post by **otterman** » Thu Dec 04, 2008 4:54 am

o2 sensor do jack **** in SRs lol so I doubt it's that. I've actually ran without mine for a while.

Have you done a boost leak test?

Post by **bassboost** » Thu Dec 04, 2008 8:03 am

Nope..I think I found the problem..being a hole in the intercooler piping. I'm no longer getting 10.0 AFR readings, everything seems to be looking good. I need to turn my boost down today to get my AFR's in a better higher rpm reading. Right now its looking high 12 AFR's....

Post by **burntricer** » Thu Dec 04, 2008 9:27 am

damn, i know i dont have any leaks :@

Post by **otterman** » Thu Dec 04, 2008 10:17 am

bassboost wrote:Nope..I think I found the problem..being a hole in the intercooler piping. I'm no longer getting 10.0 AFR readings, everything seems to be looking good. I need to turn my boost down today to get my AFR's in a better higher rpm reading. Right now its looking high 12 AFR's....

oh haha, I guess I would have saw that if I read the whole thread before posting. Boost leaks suck and can make your car gay.

Post by **bassboost** » Thu Dec 04, 2008 2:26 pm

Yeah, no biggie. So I turned my boost down to about 14psi..everything is running GREAT now Thanks for all the help guys/gals

Post by **RFcool** » Fri Dec 05, 2008 6:21 pm

okay help similar problem that im having too. This car i bought off of REPO MAN here on NICO and i cant figure out why its running the way it is. IM very much so a SR newby. here is my link, but not trying to thread jack. please keep posting here if we can. Seems to be a common problem with a few ppl.

zerothread?id=388431

Post by **RFcool** » Fri Dec 05, 2008 6:22 pm

bassboost wrote:Yeah, no biggie. So I turned my boost down to about 14psi..everything is running GREAT now Thanks for all the help guys/gals

glad to here its running well again bro. enjoy

SR running deathly rich...:(

SR running deathly rich...:(

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