L98IROCZ89

I have the MSD 6A boxinstalled and my car has really rough starts... especially when cold.

I am thinking mayeb the O2 sensor. When I got my headers installed I reused the O2 sensor from my exhaust manifolds which appeared to be working fine. Could that be the problem? SES light never comes on. Is there a specific type of O2 sensor that I should be using with headers? Where can I get it?

Any other ideas?

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1989 Chevrolet Camaro IROC-Z
L98 - 350c.i. TPI, rebuilt 700R4 auto w/shift kit, Dual catalyst Monza PaceSetter Cat-Back, SLP 1 5/8 Coated Headers, 3.23 Posi rear, Hypertech chip with 160stat, MSD 6A, Under-Drive pulleys, AFPR, K&N's, !Air Box w/ Ram Air, moddified MAF, !TB Coolant, Spohn Dual Cat SubFrame Connectors, Alarm, Keyless entry, remote starter, 92 Z28 AeroWing, Brand New Paint (6/21/01)

Future: ZZ4 TPI w/EGR, T56, 3.42 or 3.73, Spohn strut tower brace and LCA's, Accell 24# injectors

1989 Chevrolet Celebrity Eurosport <--DEAD AS OF 9/20/01
2.8 MPFI, no mods
225,000 miles and still ticking!

More info and pics on my webpage:http://go.to/iroc-z

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o2 doesnt affect the starts. Did you try it with the MSD disconnected?