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New member, please help. 89 gt new exhaust running rich.

885 Views 6 Replies 4 Participants Last post by  Smurf stang
i have an 89 gt with a few slight mods. it has a cam, cold air intake, msd coil, 3 row radiator, and an electric fan. this past week I had my new exhaust put on. it consists of mac 1 5/8" long tubes, 3" catless h pipe, and 3" cat back. Before the exhaust was put on, the car ran perfect. after the exhaust, the car ran rich. I was able to smell fumes when I was idling and sometimes when I drive. one of my buddies recommended swapping the 02 sensors for heated 02 sensors. he said that the 02 sensors required a specific amount of heat from the engine that got reduced when the long tubes got put in. need some help. any recommendations?
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honestly not that I know of. and I can give them a shot. when I looked real quick on their site, I only saw the tuner for the sn-95 mustangs though
Everything is set to factory standards. What I was told is that because the o2 sensors were moved farther away from the motor, they don't get as hot as they need to. This causes the at ratio to be off. Is this the case? One idea my Buddy's shop gave me was a swap from unheated o2s to a heated o2 style. Any thoughts on that?
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