Need help 2002 c5 won't start
Thread Starter
Pro
Joined: Feb 2009
Posts: 554
Likes: 1
From: Ft Lauderdale FL
Need help 2002 c5 won't start
I have 2002 C5 manual that will not start, it turns over fine, has fuel pressure but has no spark out of any of the 8 coils. I have checked all the mini and max fuses in both fuse boxes. Anybody have any ideas...it would be appreciated
Tech Contributor
Joined: Jan 2007
Posts: 19,450
Likes: 1,155
From: Dyer, IN
Do you have a scanner capable of reading RPM? If so, that's the first thing I would check, to see if the crank sensor is providing an output. Have you checked 12 volts and ground to the coil packs?
Pro
Joined: Feb 2008
Posts: 616
Likes: 124
From: Thornton PA
St. Jude Donor '23, '25
This. If no power at the coils, work backward and check the ignition relay.
Tech Contributor
Joined: Jan 2007
Posts: 19,450
Likes: 1,155
From: Dyer, IN
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
On top of EACH fuse, there are TWO small slots. They are TEST POINTS. Read both of those test points to ground and you should see battery voltage (make sure that the appropriate circuit is ON if required!BC
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Well, you either have a missing/loose ground OR the PCM is not firing any of the coils! How are you reading the DTCs? Are there any CEL or dash messages?
Thread Starter
Pro
Joined: Feb 2009
Posts: 554
Likes: 1
From: Ft Lauderdale FL
Thanks Bill,
There are no ground problems . So the PCM could be the culprit. When it went down it was driving and melted the drivers side 02 sensor wires on the headers and oil pressure sending unit wires and stalled but thats it . and they have been repaired. What about the Crank and Cam sensors???
Thanks Bill
There are no ground problems . So the PCM could be the culprit. When it went down it was driving and melted the drivers side 02 sensor wires on the headers and oil pressure sending unit wires and stalled but thats it . and they have been repaired. What about the Crank and Cam sensors???
Thanks Bill
Instructor
Joined: May 2008
Posts: 234
Likes: 1
From: Midland Texas
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
Melting Slicks
Joined: Jun 2005
Posts: 3,088
Likes: 61
From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion
St. Jude Donor '07
Did you wash your car before this happened? The only reason I ask is mine did the same exact thing after I washed my car and it turned out there was water in the 2 plugs that go to the pcm...........Paul
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
Thread Starter
Pro
Joined: Feb 2009
Posts: 554
Likes: 1
From: Ft Lauderdale FL
Nothing was wet , it was on the road when it went down. All wires have been repaired all grounds checked and the crank sensor replaced and it still has no spark. I will have the PCM check..
