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Old 06-30-2013, 03:01 AM   #1
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94 lt1 383 running rich loseing power when warm

Hey new to site car act really funny throttle response is good cold get worse warm And i get real loud backfire when i rev eng on decel and u can smell gas bad to tell little more bout car it has long tube headers 180cc afr heads hotcam eagle crank been tuned by pcmforless if anyone can help thanks
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Old 06-30-2013, 09:44 AM   #2
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Re: 94 lt1 383 running rich loseing power when warm

How old are the O2 sensors? Any sign of misfires? That will cause the engine to run rich based on the feedback from the O2 sensors? So will exhaust leaks before the O2 sensors.
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94 Formula A3+1: 381ci all-forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / Comp Cams custom solid roller / TH400 + GearVendors OD / Strange 12-bolt - 4.11's / 300-shot N2O / Spohn suspension / 6-pt roll bar with integrated SFC's / AutoMeter instrumentation / MoTeC M48Pro engine management system / a few other odds 'n ends. 800HP/800LB-FT at the flywheel.
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Old 06-30-2013, 03:12 PM   #3
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Re: 94 lt1 383 running rich loseing power when warm

No exhaust leaks and new denso o2 sensors so gonna try to data log again and opti is new so im lost right now till i data log thanks for ur reply
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Old 07-01-2013, 10:57 AM   #4
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Re: 94 lt1 383 running rich loseing power when warm

Did you have the problem BEFORE you installed the new Denso O2 sensors? Most people report the best results with AC Delco or Delphi sensors.
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94 Formula A3+1: 381ci all-forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / Comp Cams custom solid roller / TH400 + GearVendors OD / Strange 12-bolt - 4.11's / 300-shot N2O / Spohn suspension / 6-pt roll bar with integrated SFC's / AutoMeter instrumentation / MoTeC M48Pro engine management system / a few other odds 'n ends. 800HP/800LB-FT at the flywheel.
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Old 07-01-2013, 01:40 PM   #5
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Re: 94 lt1 383 running rich loseing power when warm

No i bought car it had 93 ecm so i switched over to 94 pcm and 94 intake i bought the heated denso 02 sensors never tryed anything else the other sensors was one wire i think they where bosch which i no r bad but i can give ac delco a try ill try anything a this point thanks for ur reply keep them coming cause car geting like 8 mpg it sucks had pcm tuned for accel 30lb injectors maybe the guy lie to me bought what wad in motor he said it was 383 but no way to tell unless i pull oil pan and look at crank dont really no if its the tune r what might just fork out money and get a dyno tune here in jax fl. By HP TUNERS GUY NAME IS TONY GUNONER THINK I SPELLED THAT RIGHT
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Old 07-01-2013, 01:48 PM   #6
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Re: 94 lt1 383 running rich loseing power when warm

Guy i bought car from seem like good guy and showed me all paper work of what was done to car but these days u cant trust no one and mailorder tunes arent that great from what i here i gues i find out when i do a rebuild and tear motor down i might just do that that way i no everything is right with motor
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Old 07-01-2013, 02:07 PM   #7
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Re: 94 lt1 383 running rich loseing power when warm

Dam fred i just looked at ur car now thats a car bad *** u must love it u got to have a passion for race looks like alot of $$$$ in that car my last camaro ran 12.03 at 109 mph i thoght that was fast for all motor i bet ur runing low 10s beautiful car man ill get mine there one day hopefully
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