420A 98 Eclipse GS Auto running rich

[DSMHayden]

Need some help diagnosing a running rich problem on my 98 GS AUTO. Cylinders 1-3 were wet and smelt of fuel cylinder 4 looks relatively normal. Doesn’t like to idle, check engine light on. Replaced tps, iac/v, cts, 02 sensors and still persists. Any ideas?

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[1990TSIAWDTALON]

What are the codes?

 

[BLACK'98DSM]

Yep, current and history codes would be helpful. Get those scanned.

It wouldn't surprise me if that MSD ignition coil has gone bad. They are prone to, well, being junk. I always just used my OE unit before Megasquirt. Seriously, go read the reviews for them. Not working out of box, or gone bad in 1 year. The SRT-4 community hates them (same part). The OE coil produces 40,000 volts while the MSD only produces 36,000. Of course amperage is the real key to ignition coil upgrades, but they don't even have a spec for that. The plug cables are fine to use though.

 

[DSMHayden]

P0172

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