Finally! Got her started...but...
Thread Starter
Le Mans Master
Joined: Jul 2001
Posts: 6,252
Likes: 2
From: Silicon Valley Kalifornia
Finally! Started...but...headers glow red
After eons of planning and assembling (and after some setbacks in life) I finally got her started...15 minutes ago....but the exhaust headers started glowing red :eek: So I shut the motor off. The wide band was showing 15:1 AFR. Why is this? My cam is very mild. Cat is in place too. See below for engine specs. Any input appreciated. Supercaharger is not installed. Injectors installed are stock with stock tpi. Stock prom should be able to handle this combo?
[Modified by GRX, 8:23 PM 11/17/2003]
[Modified by GRX, 8:23 PM 11/17/2003]
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Finally! Got her started...but... (GRX)
It sure sounds like it's running way rich..time for some diagnostics:
-What mods/work have you done on it since it last ran?
-Are all the injectors firing (put a finger on each harness)?
-Are all cylinders firing...what do the spark plugs look like?
-Are the headers coated?
-How long till they glow?
-Where is the wide-band & is it connected to the ECM or is the ECM reading thge stock O2 sensor?
-What mods/work have you done on it since it last ran?
-Are all the injectors firing (put a finger on each harness)?
-Are all cylinders firing...what do the spark plugs look like?
-Are the headers coated?
-How long till they glow?
-Where is the wide-band & is it connected to the ECM or is the ECM reading thge stock O2 sensor?
Melting Slicks
Joined: Jan 2002
Posts: 2,784
Likes: 3
From: Atlanta GA
Re: Finally! Got her started...but... (65Z01)
It sure sounds like it's running way rich..time for some diagnostics:
-What mods/work have you done on it since it last ran?
-Are all the injectors firing (put a finger on each harness)?
-Are all cylinders firing...what do the spark plugs look like?
-Are the headers coated?
-How long till they glow?
-Where is the wide-band & is it connected to the ECM or is the ECM reading thge stock O2 sensor?
-What mods/work have you done on it since it last ran?
-Are all the injectors firing (put a finger on each harness)?
-Are all cylinders firing...what do the spark plugs look like?
-Are the headers coated?
-How long till they glow?
-Where is the wide-band & is it connected to the ECM or is the ECM reading thge stock O2 sensor?
Check your timing as well.... See where your at
[Modified by StealDads67, 8:13 PM 11/17/2003]
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Finally! Got her started...but... (StealDads67)
Well the WB O2 shows very lean but the glow usually comes from raw fuel burning in the headers.
So, I'm also wondering if there is a leak in front of the O2 sensor.
So, I'm also wondering if there is a leak in front of the O2 sensor.
Thread Starter
Le Mans Master
Joined: Jul 2001
Posts: 6,252
Likes: 2
From: Silicon Valley Kalifornia
Re: Finally! Got her started...but... (65Z01)
Well, mods are a lower comp ratio: about 8.7:1 ... Cam is a custom roller with 209*/217* @.050, .495/.515 (1.5) 114LC ...heads are AFR 190's (large valves)... gapless rings. Accel intake base.
All cylinders are firing. Header are not coated. about 5-10 minutes at about 1500-2000rpm and then they glow. ECM reads stock O2 sensor.
All cylinders are firing. Header are not coated. about 5-10 minutes at about 1500-2000rpm and then they glow. ECM reads stock O2 sensor.
Thread Starter
Le Mans Master
Joined: Jul 2001
Posts: 6,252
Likes: 2
From: Silicon Valley Kalifornia
Re: Finally! Got her started...but... (Vette92)
Well, complete new long block. Forged bottom end and AFR heads. Yes firing order is correct...it runs relatively smooth.
[Modified by GRX, 6:51 PM 11/17/2003]
[Modified by GRX, 6:51 PM 11/17/2003]
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Thread Starter
Le Mans Master
Joined: Jul 2001
Posts: 6,252
Likes: 2
From: Silicon Valley Kalifornia
Re: Finally! Got her started...but... (65Z01)
Well the WB O2 shows very lean but the glow usually comes from raw fuel burning in the headers.
So, I'm also wondering if there is a leak in front of the O2 sensor.
So, I'm also wondering if there is a leak in front of the O2 sensor.
Thread Starter
Le Mans Master
Joined: Jul 2001
Posts: 6,252
Likes: 2
From: Silicon Valley Kalifornia
Re: Finally! Got her started...but... (neverendingproject)
check your timing. retarded timing will do this.