Anyone know where I can get a heated O2 sensor cheap for a 1988 GTA 5.7L? I think this is the problem because I have rough idle on cold starts after I installed the ZZ-9 Cam. After it warms up it runs fine. It smells very rich when it idles rough. Nothing was changed before and after the Cam install other than a Big Mouth Manifold and a TPIS level 4 PROM. Tried switching to a stock PROM and same thing. Could the O2 sensor not be getting hot enough for correct readings? The cold start up is fine on warm days (50*F and higher). The exhaust lift on the cam is now at .520.

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1988 GTA 5.7L Auto
355 ci. block, SLP Cold Air Intake w/ K&N, fully modified MAF Sensor, TPIS 52mm Throttle Body w/Air Foil, Fully Ported and Polished Plenum, Nikel-plated Ported SLP Siamesed Runners, Ported TPIS Big Mouth Intake Manifold, stock heads w/ 1.52 Comp Cams Self-aligning Roller Rockers, TPIS ZZ-9 Roller Camshaft, TPIS Valve Springs, Cloyes True Double Roller Timing Chain, TPIS Adjustable Fuel Pressure Regulator, Balanced Bosch 22 lb/hr Fuel Injectors, MSD 6AL, Taylor 10mm Wires, Bosch Platinum +4 Spark Plugs, MSD Blaster Coil, March Underdrive Pulleys, 6 3/4" Vibratech Streetdamper, TPIS Level 4 PROM, 160 T-stat, Low Temp. Fan Switch, Stock Distributor w/ Bronze Gear, SLP 1 3/4" Headers, Random Technologies High Flow Cat., Adjustable Borla Cat Back Exhaust, Level 10 PTS-3 700R4 Trans, B&M Holeshot 2400 Stall Converter, B&M Trans Cooler, TCI Aluminum Finned Trans Pan, Torque Converter Lock Up Switch, 3" Balanced Aluminum Driveshaft, 3.73 Richmond Gears, Auburn Pro-Series Differential, Aluminum Differential Cover w/ Main Cap Preloads, BF Goodrich Drag Radials 255/50 R16, Hotchkis Lower Control Arms, Hotchkis Panhard Rod, Hotchkis Tie Rod Adjuster Sleeves, Bilstein Heavy Duty Shocks and Struts, 1LE Springs, Energy Suspension Polyeurethane Bushings, Global West Tubular Subframe Connectors, Global West Steering Box Brace, HP Motorsports 3 Point Strut Tower Brace

"Why ride a stang when birds can fly?"

http://www.geocities.com/thegta

 

You get one from your local auto-parts store! Just ask.

Dont forget you need to make up an adaptor for it so it works.

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what is a heated O2 sesor?

 

Considering you've dealt with TPIS, they have one available, look for p/n 300-162
http://www.tpis.com/pg37-40.html
It comes complete with all connectors, wiring and instructions needed to convert from a single wire sensor.