C4 Intermittent Rough engine
Thread Starter
6th Gear
Joined: Oct 2024
Posts: 6
Likes: 0
From: Livonia, NY
C4 Intermittent Rough engine
1985 Tuned Port Injection. 90% of the time engine runs perfectly. Every once in a while car starts hard and then engine runs tough at idle and loads up upon acceleration. After sitting foe a day car runs perfectly.. until the next tine😩
Race Director
Joined: Mar 2010
Posts: 15,992
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Our recommendation would be to take your vehicle to a GM dealership for a diagnosis. Should you need assistance with this, you can email us at socialmedia@gm.com
