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6/7/17 2:35am - Original Message: 'Opti Spark'
Frederick C
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Waldron, IN - USA

Vette(s):
1985 383 Stroker Lingenfelter built

Joined: 6/7/2017
Posts: 7
Hello everyone,
 
I was driving my car the other day and 5 minutes into the drive the Car acted if it were running on 4 cylinders all of a sudden. No back fire, or miss. Just loss of power, it ran but it sounded like the exhaust was plugged up. Could this be the result of the Opti Spark taking a dump? I own a 1985 C4
 
Thanks for any help,
 
Frederick C.
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6/7/17 5:51am - Reply: 'Re: Opti Spark'
CaledoniaBrian
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, - Canada

Vette(s):
1988 Convertable

Joined: 11/3/2011
Posts: 148
Unless you have swap out motors your L98 doesn't have an opti spark. 
 Sounds like your cat may be plugged. 


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6/7/17 10:31pm - Reply: 'Re: Opti Spark'
Frederick C
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Waldron, IN - USA

Vette(s):
1985 383 Stroker Lingenfelter built

Joined: 6/7/2017
Posts: 7
Thanks for the reply, I was thinking that when someone suggested that, and I was like I have a distributor by the Plenum...I'll check that out, thanks again!
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6/15/17 7:23pm - Reply: 'Re: Opti Spark'
Tsmooth68
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Vette(s):
1993 Chevrolet Corvette Base Edition. Exterior Color is Polo Green with Tan interior. 5.7 LT-1 V-8 with 4-speed automatic transmission.

Joined: 6/4/2016
Posts: 13
I agree with CaledoniaBrian. You might have a slightly clogged catalytic converter. Be grateful that you don't have an LT1 like I do. I just had my Opti-Spark distributor replaced on my 1993 Base model. Along with a new water pump it cost me well over $1900 in parts and labor.

|UPDATED|6/15/2017 5:23:31 PM (AZT)|/UPDATED|


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6/28/17 2:18pm - Reply: 'Re: Opti Spark'
PoloGreen93'
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Vette(s):
1993 coupe 100% original polo green

Joined: 7/26/2015
Posts: 34
Well fellow C4 er. Have a 93' LT1 , I'm not a pro. By any stretch of imagination. Mine was leaking oil at back left corner of intake manifold (commen) .did a little research ( you-tube) and took it on over last winter , gasket kit cost $. 39.00 and after removal of throttle body, air intake, water pump, drain cooling system opti-spark and damping puller . The last opsticle was the oil pan , had the car up on jack-stands, about 20 inches , tires where about 8 inches off ground , was able to drop oil pan start replacing oil pan gasket and the rest was reversal of tear down steps , worked out well ! Have sum faith in yourself bro you can do it , if it ever happens again , total job was about $50 bucks good luck
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