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Sudden problem

RichNJshore

Member
Joined
Aug 22, 2005
Messages
22
Location
nj
Corvette
1993 Torch Red Coupe
Help,
My well kept, running like a watch, 1993 coupe suddenly backfired and lurched while I was driving locally at about 35 MPH. It then stopped. I tried to start it it cranks, but when it started it sputtered and backfired and immediately shut down.
It is at my mechanic now, but hewon't get to look at it till Thursday.

Timing belt? It has 93K miles on it. If so is it a tough fix and how much average cost?

Thanks
 

bradfordsvettes

Well-known member
Joined
Mar 28, 2001
Messages
549
Location
Boston, MA area
Corvette
jewel blue 61.cranberry 69 t-top.black rose 92
I doubt it is a timing chain these motors are pretty bullit proof . my guess would be an opti-spark problem or fuel pump issue . the bottom line is it needs to be scanned for codes before starting any diagnostics. then get out the service manuel Steve
 

RichNJshore

Member
Joined
Aug 22, 2005
Messages
22
Location
nj
Corvette
1993 Torch Red Coupe
I figured fuel pump problem would have given me a harder start. It starts and would even run (really rough) if you rev the engine. I didn't take much time to mess around because I wanted to bring it in instead of trying to diagnose on th side of the road. What is the opti spark all about?
 

RichNJshore

Member
Joined
Aug 22, 2005
Messages
22
Location
nj
Corvette
1993 Torch Red Coupe
Thanks for the replies. Actually I had an old camaro that had a loose element in the cat which clogged up the exhaust and messed up the back pressure causing the same symptoms. I know I'll just have to let my Mech have at it, but I like to be educated when I talk to them.
 

davec0_17

Well-known member
Joined
Feb 7, 2006
Messages
164
Location
Houston, PA
Corvette
1994 black 6 speed, cat back flowmasters
I dont thing fuel pump, or opti. Both would have given more notice before they failed. Whatever the repair, I hope its wallet friendly. :)
 

RichNJshore

Member
Joined
Aug 22, 2005
Messages
22
Location
nj
Corvette
1993 Torch Red Coupe
It was the distributor assembly and rotor which in turn damaged the optispark. So throwing in a new serpentine belt and tensioner with labor.............1400.00 OUCH. That opti is a pricey part. But my buddy is running like a watch again. Thanks for all the answers
 

Toms007

Moderator
Joined
Sep 24, 2004
Messages
6,526
Location
Southwest Kansas
Corvette
2007 Atomic Orange Coupe
Thanks for letting us know, I thought it might be the opti. Did you go with OEM replacement or one of the after market versions? MSD has one that I would seriously consider.
 

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