92 C4 Won't Start after 4 years
Thread Starter
1st Gear
Joined: May 2015
Posts: 1
Likes: 0
92 C4 Won't Start after 4 years
Hello,
Our 92 C4, LT1 Auto will not start after sitting for 4 years. We checked codes (none), added fresh gas (was 1/4 full, filled with 10 gallons), checked fuel pump (registers 42 PSI when the pump is cycling, but drops afterward). The engine ran on starting fluid but seems to act like it is flooded. We connected a plug but do not see a spark. TPS measures 0.62V. No security faults noted. We just changed out the steering column. Any thoughts or ideas?
Your help is appreciated.
Regards,
Ed
Our 92 C4, LT1 Auto will not start after sitting for 4 years. We checked codes (none), added fresh gas (was 1/4 full, filled with 10 gallons), checked fuel pump (registers 42 PSI when the pump is cycling, but drops afterward). The engine ran on starting fluid but seems to act like it is flooded. We connected a plug but do not see a spark. TPS measures 0.62V. No security faults noted. We just changed out the steering column. Any thoughts or ideas?
Your help is appreciated.
Regards,
Ed
Race Director
Joined: Mar 2015
Posts: 15,926
Likes: 579
Hello,
Our 92 C4, LT1 Auto will not start after sitting for 4 years. We checked codes (none), added fresh gas (was 1/4 full, filled with 10 gallons), checked fuel pump (registers 42 PSI when the pump is cycling, but drops afterward). The engine ran on starting fluid but seems to act like it is flooded. We connected a plug but do not see a spark. TPS measures 0.62V. No security faults noted. We just changed out the steering column. Any thoughts or ideas?
Your help is appreciated.
Regards,
Ed
Our 92 C4, LT1 Auto will not start after sitting for 4 years. We checked codes (none), added fresh gas (was 1/4 full, filled with 10 gallons), checked fuel pump (registers 42 PSI when the pump is cycling, but drops afterward). The engine ran on starting fluid but seems to act like it is flooded. We connected a plug but do not see a spark. TPS measures 0.62V. No security faults noted. We just changed out the steering column. Any thoughts or ideas?
Your help is appreciated.
Regards,
Ed
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
There's your problem. Engine won't start w/o spark....although this doesn't jibe:
"The engine ran on starting fluid"
I'd re-check for spark, then if none, start diagnosing no spark. I'd start at the "beginning" by seeing if there is a crank signal by hooking up a scan tool, and watching RPM while cranking.
"The engine ran on starting fluid"
I'd re-check for spark, then if none, start diagnosing no spark. I'd start at the "beginning" by seeing if there is a crank signal by hooking up a scan tool, and watching RPM while cranking.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
some simple things...
check the coil wire. they do rub the waterpump and will ground out.
check the harness TO the coil. If it's loose or flopping... not so good.
Also check the harness to the Optispark. It is on the right side of the intake manifold, 6 wire rectangle plug, 5 wires in, one is a ground. Check it for damage or whatnot. Also check the opti harness into the opti itself. If that is loose... Or corroded.
Starting fluid is a bit more volatile than gas, so it will light up easier. A weak spark will set it off, vs the stronger spark needed for gas.
check the coil wire. they do rub the waterpump and will ground out.
check the harness TO the coil. If it's loose or flopping... not so good.
Also check the harness to the Optispark. It is on the right side of the intake manifold, 6 wire rectangle plug, 5 wires in, one is a ground. Check it for damage or whatnot. Also check the opti harness into the opti itself. If that is loose... Or corroded.
Starting fluid is a bit more volatile than gas, so it will light up easier. A weak spark will set it off, vs the stronger spark needed for gas.
