Home page
  Home Page   Contact Us   Our History   Advertise with Us   Sponsor List   Link to Us   Compare Levels   Member Agreement   Privacy Policy   About C4VR
  Community Forums   Active Threads   Forum Search   Top Posters List   Private Messenger   C4VR Email System   C4 Corvette Quiz
  Members Vettes & Pictures   Member Stories   Member Stats   Real Time Member Map   Member Search   Member Calendar Entry Form   Who's Online
  C4 Registry Data   C4 Corvette Statistics   C4 Corvette Tips & Tricks   C4 Corvette How-Tos   Corvette Club Listing   Corvette Event Listing   Mechanic Directory   Corvette VIN Decoder   Save the Wave   Corvette Emblem History
  C4 Corvette Parts Auctions on eBay   Corvette Books   C4VR In-Stock Apparel & Accessories   C4VR Member Name Badges   C4VR Custom Apparel & Accessories @ Zazzle   C4VR Window Stickers   C4VR Member Calendars   Shop Amazon.com
☰
SPONSOR AD

Topic: 94 C4 no spark

in Forum: C4 Engines

Already a Member? Click Here to Login

94 C4 no spark

Posted: 6/21/14 5:45pm Message 1 of 8
Profile Pic
Spitfire0_2
Standard Member
Send PM
Angier, NC - USA
Joined: 6/18/2014
Posts: 2
Vette(s): 1989 Coupe 1994 Coupe
I am having a problem with my 94 C4 LT1, I checked for spark and have none what should I check next? Will appreciate any help.




SPONSOR AD:: (Our Sponsors help support C4VR)

Re: 94 C4 no spark

Posted: 7/1/14 6:18am Message 2 of 8
rtslt4
Standard Member
Send PM
Miller Place, NY - USA
Joined: 7/2/2013
Posts: 51
Vette(s): 1996 Black Cpe., Lt. Beige Int., LT4, 6 Spd., Corsa Exh., K & N, & Chrome Replc. Wheels.
Check to see if the coil works.


Rts-LT4

Re: 94 C4 no spark

Posted: 7/2/14 6:08am Message 3 of 8
Black Shark
Standard Member
Moderator
Send PM
Joined: 3/20/2009
Posts: 611
Vette(s): Black 1979 L-82 Black 1996 LT1 Black 1999 Coupe

check---ICM---ignition control module....its on the passenger side head, one front of motor.




good luck




Re: 94 C4 no spark

Posted: 7/8/14 11:28am Message 4 of 8
TLAVAC
Standard Member
Send PM
beaufort, SC - USA
Joined: 9/1/2009
Posts: 39
Vette(s): 1990 Turquoise Corvette (his) & 1990 Turquoise Corvette (hers)indy festiville car for sale
its probably the opti spark.the coils rarely ever go bad.from experience with my buick lt1,had same problem,changed coil,no help.opti spark fixed it.ck a gm mech and he will give you the same advice.


Re: 94 C4 no spark

Posted: 7/10/14 8:06am Message 5 of 8
Profile Pic
Spitfire0_2
Standard Member
Send PM
Angier, NC - USA
Joined: 6/18/2014
Posts: 2
Vette(s): 1989 Coupe 1994 Coupe
Thanks for the advice,men. I changed the Opti Spark, the old one was badly corroded. Still no spark, though. Had the ICM tested at a local parts store, it checked bad. Can't wait to get it together, believe it will run now.




Re: 94 C4 no spark

Posted: 7/22/14 9:09am Message 6 of 8
Profile Pic
Adam Wartell
Standard Member
C4VR Founder
Send PM
Eagleville, PA - USA
Joined: 3/18/2009
Posts: 5099
Vette(s): 1979 Corvette Red T-Top
How did you make out with this? Did you get it running?  What was the cause?


Re: 94 C4 no spark

Posted: 7/30/14 11:51am Message 7 of 8
FLDAVE
Standard Member
Send PM
Joined: 11/22/2009
Posts: 60
Vette(s): 1953 1992 BLACK ON BLACK
Did you try looking at any stored codes thru the CCM (Central Control Modual)? The CCM will look at all the codes even the ECM (Engine Control Modual). On the pre OBD II you jumper between A and G on the diagnostic port connector. On OBD II there different. Maybe someone could chime in with the terminal jumper no.'s. No need to buy a scan tool. 


Re: 94 C4 no spark

Posted: 7/30/14 11:55am Message 8 of 8
FLDAVE
Standard Member
Send PM
Joined: 11/22/2009
Posts: 60
Vette(s): 1953 1992 BLACK ON BLACK
Oh, oh. I found it. Jumper between 4 and 12. It's called the ALDL it' s located just above the drivers knee.


in Forum: C4 Engines


SPONSOR AD: (Our Sponsors help support C4VR)