HEGO Question (Check Engine)

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HEGO Question (Check Engine)

Unread postby biffbastion » Thu Nov 09, 2017 8:17 am

Okay so I didn't have any luck with anyone commenting on my log, so decided to take a snapshot of what was going on. I noticed during that run that the IEGO1 stayed at 0.02 to 0.03 and the IEGO2 was staying around 0.93-0.94 during cruising. During this time the check engine flashed on and then later it finally went out....probably when I accelerated again. What could be causing this? I noticed the FUELPW1 and 2 were well off from each other. Assuming because of the info the O2's were sending. Just note I am running an X pipe and I have not disabled the driver bank just yet. I still get intermittent check engine lights when driving. I am going to swap out the 02's to see if that does anything.

Thanks
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biffbastion
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Re: HEGO Question (Check Engine)

Unread postby decipha » Thu Nov 09, 2017 8:54 am

your banks are most likely fine, the reason why one side is going lean and the other is going full rich is because the x pipe is cross scavenging, that's how x pipe's function, sounds like your x pipe is working fine

with an x pipe you have to disable hego2 in order to prevent this issue

viewtopic.php?f=14&t=364
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Re: HEGO Question (Check Engine)

Unread postby biffbastion » Thu Nov 09, 2017 9:01 am

So basically I am chasing my tail with this one. Thanks Decipha. Finally had more time to revisit this. Yeah every log I check shows the Passenger side at full Lean and the Driver side goes full rich. I will switch it to the Passenger bank only and try more logs. Still thinking about getting that wideband, but since I am so close to stock you would think I really do not need it at this point. Perhaps I am wrong about that too
biffbastion
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Posts: 23
Joined: Tue Jul 25, 2017 7:43 am
Location: North Carolina
Name: Wayne
Vehicle Information: 1990 Mazda Miata swap with 5.0 from a 1991 Tbird, T4M0 EEC, Explorer 19# injectors, shorty headers, x-pipe, dual Magnaflows w/high flow cats, SN95 Cobra Intake, T5Z, 3.27 Tbird Rear
Moates Quarterhorse

Re: HEGO Question (Check Engine)

Unread postby decipha » Thu Nov 09, 2017 9:08 am

read the fuel write up, i explain how to leave it in closed loop at wot to make sure shes dialed in
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decipha
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Posts: 13459
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce

Re: HEGO Question (Check Engine)

Unread postby biffbastion » Thu Nov 09, 2017 9:19 am

Will do Sir. Thanks!
biffbastion
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Posts: 23
Joined: Tue Jul 25, 2017 7:43 am
Location: North Carolina
Name: Wayne
Vehicle Information: 1990 Mazda Miata swap with 5.0 from a 1991 Tbird, T4M0 EEC, Explorer 19# injectors, shorty headers, x-pipe, dual Magnaflows w/high flow cats, SN95 Cobra Intake, T5Z, 3.27 Tbird Rear
Moates Quarterhorse


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