94 corvette timing
Team Owner
Joined: Aug 2005
Posts: 34,988
Likes: 515
From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
You would need to post more information regarding your Corvette. Based on your thread title you have a 94 Vette and I also assume you have LT1 with the infamous likely to be the factory Opti Spark.
How are you reading the timing?
What type of fuel are you using?
Is the "service engine" light on?
Is this car new to you/recent purchase?
Fill up your profile Bill
Thread Starter
3rd Gear
Joined: Sep 2010
Posts: 3
Likes: 0
From: Shirley Arkansas
94 corvette timing
Thanks, First time here. 94 LT1 base. Just started going bad. Went to a shop and they had a computer that read the degrees for timing. I have a brand new opti spark with the vented lines. It will be installed tommorrow. Hop it works. Thanks again. Bill
Drifting
Joined: Jun 2010
Posts: 1,853
Likes: 8
From: Westerly RI
Welcome to the forum!
Ignition timing is controlled by the ecm, not the opti.
Fuel requirement is 91 octane, but if the timing readout is correct, the engine would ping anyway. It might be worthwhile to pull codes even if the service light is not on, as there may be history codes stored.
Ignition timing is controlled by the ecm, not the opti.
Fuel requirement is 91 octane, but if the timing readout is correct, the engine would ping anyway. It might be worthwhile to pull codes even if the service light is not on, as there may be history codes stored.
Thread Starter
3rd Gear
Joined: Sep 2010
Posts: 3
Likes: 0
From: Shirley Arkansas
Thanks for the input. I already had a new vented opti spark. I agree with you also. Their were no codes. The knock sensor had six knocks. It should retard the timing but it doesn't appear to.
Drifting
Joined: Jun 2010
Posts: 1,853
Likes: 8
From: Westerly RI
I don't understand this comment. BTW, there are two knock sensors on the LT1 and if they are not working correctly, the ecm should set code 43. Possibly the ecm is at fault.
