Won't run for more than 7 seconds
03-19-2014, 03:19 PM
#1
Cruising
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Member Since: May 2013
Location: LA
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Won't run for more than 7 seconds
So, got a heavily modded C4 for a good price. Problem is it doesn't run. Well, not for long. I know this problem can be a thousand different things but I was wondering if y'all cool cats might have some ideas to throw at me.
Here's a video of me starting it today:
PS I'm bringing it in to a trusted high performance mechanic next week, but I figured I might get some ideas in the meantime.
1994 Corvette C4
-Engine Upgrades-
Here's a video of me starting it today:
PS I'm bringing it in to a trusted high performance mechanic next week, but I figured I might get some ideas in the meantime.
1994 Corvette C4
-Engine Upgrades-
- 396 Stroker
- Engine Bored 30 Over
- 80mm Mass Air
- Staggered Roller Rockers 1.5 Intake and 1.6 on Exhaust
- Ported Edlebrock Performance Heads
- Heads Shaved 15 Thousands of an inch
- Edlebrock LT4 Intake
- 49lb Injectors
- 58mm Twin Throttle Body
03-19-2014, 04:17 PM
#4
Safety Car
Something else you may want to check out.
If the car has had the dash apart - for like heater core replacement.... There are 2 big cannon plugs under the passenger side dash that can be mixed up when putting it back together.... The car will start and run for a few seconds and then die.
Had this problem on a friends 96 when a heater core was put in it.... took forever to figure out what the heck happened. Luckily a very smart GM tech over on YB knew right off what had happened and let me know.
Will
If the car has had the dash apart - for like heater core replacement.... There are 2 big cannon plugs under the passenger side dash that can be mixed up when putting it back together.... The car will start and run for a few seconds and then die.
Had this problem on a friends 96 when a heater core was put in it.... took forever to figure out what the heck happened. Luckily a very smart GM tech over on YB knew right off what had happened and let me know.
Will
03-19-2014, 07:24 PM
#5
Le Mans Master
My first impression.It's not VATS because;
1 - It cranks.
2 - The security light is not on steady.
I would check for fuel pressure with a gauge.
After it quits, check for spark.
After it quits, check for injector pulses with a noid light.
I would check for codes in module 4 and I will tell you why. I'm not looking for a code. I want to see if the CCM can communicate with the PCM. Because if it does not, then FEDS will not work hence the injectors no drive. It's just something else to check, a point of information.
03-19-2014, 08:24 PM
#6
Racer
So, got a heavily modded C4 for a good price. Problem is it doesn't run. Well, not for long. I know this problem can be a thousand different things but I was wondering if y'all cool cats might have some ideas to throw at me.
Here's a video of me starting it today: http://youtu.be/I3m-R6gyPAs
PS I'm bringing it in to a trusted high performance mechanic next week, but I figured I might get some ideas in the meantime.
1994 Corvette C4
-Engine Upgrades-
Here's a video of me starting it today: http://youtu.be/I3m-R6gyPAs
PS I'm bringing it in to a trusted high performance mechanic next week, but I figured I might get some ideas in the meantime.
1994 Corvette C4
-Engine Upgrades-
- 396 Stroker
- Engine Bored 30 Over
- 80mm Mass Air
- Staggered Roller Rockers 1.5 Intake and 1.6 on Exhaust
- Ported Edlebrock Performance Heads
- Heads Shaved 15 Thousands of an inch
- Edlebrock LT4 Intake
- 49lb Injectors
- 58mm Twin Throttle Body
HTH,
Mick
03-19-2014, 08:37 PM
#7
Team Owner
Pro Mechanic
03-20-2014, 07:46 AM
#8
Burning Brakes
oil pressure switch is a backup only in case FP relay fails. relay is not supposed to drop out. for the pump not to run after priming the rails, both the relay and the ops would have to fail.
03-20-2014, 08:41 AM
#10
Team Owner
Pro Mechanic
