need help on dyno results

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May 8, 2004 | 08:15 PM

MorganSS

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From: Georgetown Texas

need help on dyno results

Stock 2000 SS Camaro, cutout and lid.

When I bought it: 325 rwhp
Dyno today: 285rwhp

I have noticed a HUGE lag from 2500 to 3200 rpms, friends that I would normally hang with side by side are now walking me.

Speed shop says I am running deathly lean.

The AF Ratio graph starts at 10.90 and then jumps to 18.77.

I dont understand these numbers as much as you guys do, hope you can help.

SES code has only been thrown when I am at the track or on the dyno, but usually goes away within 12 hours. I need my power back, wtf is going on.

May 8, 2004 | 10:44 PM

TheMongoose

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Sounds like you need to run a scanner on it while driving. maybe you are losing fuel pressure? Best way to figure it out is t read the numbers. Got a budy with HPTuners or autotap?

May 9, 2004 | 12:44 AM

MorganSS

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From: Georgetown Texas

See thats what I thought, then they came back and said the fuel pressure was perfect throughout the car, that really screwed me up, tomorrow we will take a closer look at it with edit I guess, I'm just not too familiar with diagnostics, my poor car, I feel so bad, anything else I should look at or suggestions?
thanks for the help

May 9, 2004 | 12:33 PM

v8maro

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From: Commerce, MI

18.77:1 is REALLY f'n lean man! I wouldn't run the rpm's up on that car till it has a tune! You are just asking for trouble.
-Steve

May 9, 2004 | 01:07 PM

JZ'sTA

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From: Ft. Myers Fl

WoW, becareful running that lean. Find a good tuner with edit, he should beable to fix your problem. The fuel system in are cars is plenty strong enough to handle way more power then you are making. You need a tune bad.

May 9, 2004 | 07:56 PM

MorganSS

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From: Georgetown Texas

the predator says its the o2 sensors, I'll replace in a couple of days and post up in case anyone else has the same prob.

thanks beotches =D ls1tech>everywhere else

May 12, 2004 | 06:17 PM

davered00ss

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From: Plainfield, CT

If you threw a code for the 02 sensors, that will retard your timing, and put your car in safe mode. That will give you the hp loss. I had the same problem. The code will not go away until it is erased, even if the light is off. The A/F is strange to me and sounds like another problem all together. Get Autotap and LS1 Edit done to it.