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Suggestions Please - Rough Idle and Misfire under load 2 weeks 15 hours ago #199244

I'm really struggling with an ongoing issue on my 1997 VVC.

The car has suddenly developed a lumpy idle, and is misfiring under load. The plugs leads and coils were changed by the previous owner around 8 months ago, and I've since upgraded the throttle body along with cleaning the IACV and replacing the IAT and Coolant temperature sensors.

I purchased the PScan unit which revealed the faulty temperature sensors (they were recording default values regardless of external conditions) but along with a trusted mechanic we've still been unable to nail the root cause of the misfire.

Does anyone have any suggestions - I've attached my logged data from a test drive yesterday in the hope that someone might spot something I've missed.

File Attachment:

File Name: mgf test d...ve-1.tsv
File Size:472 KB
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Last edit: Post by allman.pg.
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