Running Lean

stangGT95 · 06-30-2003, 10:22 PM

I've recently upgraded my 95 GT with some intake and exhaust parts only now the check engine light comes on. The upgrades include MAC cold air induction, 65mm throttle body, adj. fuel regulator (42psi), 1 5/8" unequal headers, Prochamber h-pipe, Borla catback exhaust, new O2 sensors, PCV valve and a digital air/fuel gauge. The error codes say lean mixture left and right banks and a grounded SPOUT circuit. The air/fuel is .14 at steady throttle, .98 as soon as let off gas, then down to .03 after coasting a bit. I don't see any vacuum lines off. Am I missing something simple? Has anyone had an experience like this?

Coupe50h · 07-01-2003, 01:29 AM

well i would replace that spout, definately check all sensors, you said you replaced the 02's but try resetting the computer and see if you can get rid of the check engin lgt.
how does it idle?

stangGT95 · 07-01-2003, 06:10 PM

I've have cleared the codes once before and it idles fine and sometimes it feels like it runs strong and other times it doesn't. Do you know what is involved in replacing the SPOUT? I'm not sure where to look except that the SPOUT connector is under the MAF and that it's pulled when you adjust the base timing without any changes from the computer. I have a couple more O2 sensors to try out. I also tried the TPS and it read .96 volts.

Coupe50h · 07-01-2003, 10:56 PM

Well the spout is bye the distributor on my car, probaly different on sn's, that little plug, replace that, i mean if your getting a "spout" code, it shouldnt be much $ to replace, also check the wiring, make sure everything is plugged in, injector plugs ect...

stangGT95 · 07-05-2003, 08:18 PM

I reinstalled my K&N FIPK and the engine light has not came back on and the A/F gauge reads as it should. The bend in the CAI before the MAF sensor must have been the culprit.

06-30-2003, 10:22 PM	#1
stangGT95 Registered Member Join Date: Jun 2003 Location: Novinger, Mo Posts: 72	Running Lean I've recently upgraded my 95 GT with some intake and exhaust parts only now the check engine light comes on. The upgrades include MAC cold air induction, 65mm throttle body, adj. fuel regulator (42psi), 1 5/8" unequal headers, Prochamber h-pipe, Borla catback exhaust, new O2 sensors, PCV valve and a digital air/fuel gauge. The error codes say lean mixture left and right banks and a grounded SPOUT circuit. The air/fuel is .14 at steady throttle, .98 as soon as let off gas, then down to .03 after coasting a bit. I don't see any vacuum lines off. Am I missing something simple? Has anyone had an experience like this?

07-01-2003, 01:29 AM	#2
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	well i would replace that spout, definately check all sensors, you said you replaced the 02's but try resetting the computer and see if you can get rid of the check engin lgt. how does it idle? __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

07-01-2003, 10:56 PM	#4
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	Well the spout is bye the distributor on my car, probaly different on sn's, that little plug, replace that, i mean if your getting a "spout" code, it shouldnt be much $ to replace, also check the wiring, make sure everything is plugged in, injector plugs ect... __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

07-05-2003, 08:18 PM	#5
stangGT95 Registered Member Join Date: Jun 2003 Location: Novinger, Mo Posts: 72	I reinstalled my K&N FIPK and the engine light has not came back on and the A/F gauge reads as it should. The bend in the CAI before the MAF sensor must have been the culprit. __________________ 95 GT w/ AODE and Transgo Shift kit, trans cooler, SpeedCal, KB 1.5 Flowzilla w/ 6# pulley, MAC chrome CAI, chrome radiator hoses, stock MAF w/ center post removed, 70mm PP TB, electrical boost & FP gauges, digital A/F gauge, 1 5/8" unequal headers, 2 1/2" ProChamber h-pipe, Borla catback exhaust, and 3.55's. Cobra RR hood, Saleen double wing, Xenon body kit, chrome Cobra R wheels 17X8 in front and 17X10.5 in the back.

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07-01-2003, 06:10 PM	#3
stangGT95 Registered Member Join Date: Jun 2003 Location: Novinger, Mo Posts: 72	I've have cleared the codes once before and it idles fine and sometimes it feels like it runs strong and other times it doesn't. Do you know what is involved in replacing the SPOUT? I'm not sure where to look except that the SPOUT connector is under the MAF and that it's pulled when you adjust the base timing without any changes from the computer. I have a couple more O2 sensors to try out. I also tried the TPS and it read .96 volts.