RUNNING REALLY RICH

[TONYT]

I VE GOT A 90GT THATS DONE STARTED RUNNING RICH AT START UP.WILL IDLE BUT MAN THE SMOKE FROM THE EXHAUST AND THE AMOUNT OF FUEL IT BURNS IS UNREAL.LIKE MY 96 IT JUST UP AND STARTED.STOCK SHORT BLOCK,AFR185,70MMTB,F CAM,COBRA INTAKE,24LB INJ,TUNED WITH SCT6600 CHIP,MSD6AL,TUNED BY MD ,LIKE I SAID IT WAS RUNNING FINE THEN THIS CRAP,ANY SUGGESTIONS ON CLEANING IT UP

[Demonracer]

Check your O2 sensors.

[kennebellcobra]

Any codes?

[TONYT]

DONT KNOW HOW TO CHECK FOR CODES ON THIS MODEL,AND O2'S ARE THE NEXT CHECK IF I KNEW WHAT TO LOOK FOR WHEN I TAKE EM OUT,SO THE CHECK ENGINE LIGHT DON'T LIGHT UP FOR BAD O2'S HUH,

[kennebellcobra]

Is your check engine light on? Have you checked fuel pressure? Check your vacume line going to your fpr...I have seen them go bad and suck fuel through the line.

[TONYT]

HERE'S THE LATEST AS F 4PM SAT. I REPLACED BOTH O2 SENSORS AND GUESS WHAT,NOW THE CHECK ENGINE LIGHT IS ON(WASN'T B4), BUT IT IDLES ALOT BETTER AND NOT AS RICH ,EVEN DROVE IT AROUND THE BLOCK,BUT AS I SAID IT DOES NOT AS OF NOW BLOW THAT HEAVY SMOKE FROM THE EXHAUST,SO WHY DO U ALL THINK THE CHK ENG LIGHT CAME ON AFTER THE NEW SENSORS WERE PUT ON.
FUEL PRESSURE IS AT 35 VACUM OFF

[hpfiend1]

Check your MAF voltage at idle. Should be around .8 to 1.0

Do you have good grounds to the MAF and chassis?