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Author Topic: Scan readings  (Read 2661 times)

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Offline TurboCajun

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Scan readings
« on: September 26 2015, 05:12:32 PM »
Just got my friends GN on the road, things look good on the PL and scan master except for the O2s , it's showing run lean after warm up it cycles and goes to 000 and stays there until you move the throttle, I also notice when cruising , any change in throttle speeding up , it also hits the 000 , so I put in a new 02 sensor and it's still the same . It's like it's reading and shuts off
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Offline Steve Wood

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Re: Scan readings
« Reply #1 on: September 26 2015, 05:43:39 PM »
try unplugging the orange wire and resetting the ecm...

then look for a big air leak...pcv valve, leak between maf and throttlebody, etc.
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Offline Scoobum

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Re: Scan readings
« Reply #2 on: September 26 2015, 08:20:04 PM »
Cajun...what's the BLM's?
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Offline TurboCajun

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Re: Scan readings
« Reply #3 on: September 28 2015, 02:05:07 PM »
if I remember right they were at 128 on PL but I will check when I get home to verify.
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85 GN -- Converted to 87 set-up using 66/72 turbo, front mount I/C, 80lb injectors,gn1 heads 14 bolt 1.65 roller rockers stud mount, ported intake with plate, fuel hot wire, 3" dp, running 24psi., alky kit, stroker 20 over, 212/206 roller,  best time 10.995 @ 121 1.56 60ft

Offline TurboCajun

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Re: Scan readings
« Reply #4 on: September 30 2015, 09:10:01 AM »
looking at the log the Bls are at 129 when the 02s are reading 000. I noticed that it only does it at idle and part throttle , and not at WOT.
The owner took the car home with him to have it cleaned up , so next time I have it here I will do some more checking,
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85 GN -- Converted to 87 set-up using 66/72 turbo, front mount I/C, 80lb injectors,gn1 heads 14 bolt 1.65 roller rockers stud mount, ported intake with plate, fuel hot wire, 3" dp, running 24psi., alky kit, stroker 20 over, 212/206 roller,  best time 10.995 @ 121 1.56 60ft

Offline motorhead

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Re: Scan readings
« Reply #5 on: September 30 2015, 10:42:27 AM »
What chip is in that thing? 

It sounds like it is staying in open loop (speed density) and not referencing the O2 (closed loop) until it gets upto a set load point.  Which is backwards traditional methods.
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