c4 corvette problem
Thread Starter
Cruising
Joined: Jan 2006
Posts: 10
Likes: 0
c4 corvette problem
We can't figure this one out. I am driving down the highway at 65 and the engine shuts off. The temp is around 170. I put it into neutral and it starts right back up put it in drive and it keeps going. Sometimes at a red light it stalls. Last week I was going up hill around a exit ramp turn and it stalled out. Every time it starts right back up. Any ideas for the problem?
Pro
Joined: Jun 2009
Posts: 628
Likes: 0
From: OR
We can't figure this one out. I am driving down the highway at 65 and the engine shuts off. The temp is around 170. I put it into neutral and it starts right back up put it in drive and it keeps going. Sometimes at a red light it stalls. Last week I was going up hill around a exit ramp turn and it stalled out. Every time it starts right back up. Any ideas for the problem?
Racer
Joined: Jan 2009
Posts: 262
Likes: 2
From: New Bern NC
The Same thing happen to me , turn out to be a dirty fuel filter, not allowing fuel to flow, when it stop back pressure moved some dirt around and it started back up, replaced the filter never had the problem again.
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
I had a problem like that, checked almost everything, changed the ignition coil, and it fixed it. The problem turned out to be the hot coil breaking down. Why starting it again fixed it temporarily is a baffler though
Thread Starter
Cruising
Joined: Jan 2006
Posts: 10
Likes: 0
It's a 1985. Sometimes it shows a low fuel pressure code but not to often. I can start it and it shows service engine soon, turn it off and restart it and there is no message. I really appreciate the messages so far and am going to start trying the advice.
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Thread Starter
Cruising
Joined: Jan 2006
Posts: 10
Likes: 0
The man with the computer in his hand said that the check engine soon light was on because of low pressure. He said a number but I forget what it was. Most of the time the service engine light is not on.
Le Mans Master
Joined: May 2006
Posts: 9,226
Likes: 9
From: Irvine Ca
Sorry, I don't mean to laugh.
If you would like to throw money at it, I'd start with the fuel pump (easy fix) and filter.......
seriously though, the SES light burning is something that needs to be addressed. If you are new to cars, now would be a good time to search out the list of codes for your car and then learn to pull the codes yourself.
Don't stop there.....now, once you have the codes, please attack the issues.
Melting Slicks
Joined: Feb 2008
Posts: 3,286
Likes: 6
From: Palm Beach
Just to show you that I am trying to help I will post the possible codes. You will see that there is nothing about fuel pressure. I don't care how magic the scanner is, If there is no sensor, the computer can't scan it. There is no fuel pressure transducer on a C4.
1985-1991: ECM Codes
Code #12: Normal No Codes.
Code #13: Open Oxygen Sensor Circuit.
Code #14: Coolant Sensor Circuit Low.
Code #15: Coolant Sensor Circuit High.
Code #21: Throttle Position Sensor High.
Code #22: Throttle Position Sensor Low.
Code #23: Manifold Air Temperature Circuit High.
Code #24: Vehicle Speed Sensor.
Code #25: Manifold Air Temperature Circuit Low.
Code #32: EGR System Failure.
Code #33: Mass Air Flow Sensor High.
Code #34: Mass Air Flow Sensor Low.
Code #36: Mass Air Flow Sensor Burn-Off Function Fault.
Code #41: Cylinder Select Error.
Code #42: Electronic Spark Timing.
Code #43: Electronic Spark Control.
Code #44: Lean Exhaust indication.
Code #45: Rich Exhaust Indication.
Code #46: Vehicle Anti Theft Fault.
Code #51: Faulty Mem-Cal.
Code #52: Fuel Calpak Missing.
Code #52: (1990-91 Corvette Only): Engine Oil Temperature Sensor Low.
Code #53: System Over Voltage.
Code #54: Fuel Pump Circuit Low Voltage.
Code #55: Defective ECM.
Code #62: Engine Oil Temperature Sensor Circuit High.
1985-1991: ECM Codes
Code #12: Normal No Codes.
Code #13: Open Oxygen Sensor Circuit.
Code #14: Coolant Sensor Circuit Low.
Code #15: Coolant Sensor Circuit High.
Code #21: Throttle Position Sensor High.
Code #22: Throttle Position Sensor Low.
Code #23: Manifold Air Temperature Circuit High.
Code #24: Vehicle Speed Sensor.
Code #25: Manifold Air Temperature Circuit Low.
Code #32: EGR System Failure.
Code #33: Mass Air Flow Sensor High.
Code #34: Mass Air Flow Sensor Low.
Code #36: Mass Air Flow Sensor Burn-Off Function Fault.
Code #41: Cylinder Select Error.
Code #42: Electronic Spark Timing.
Code #43: Electronic Spark Control.
Code #44: Lean Exhaust indication.
Code #45: Rich Exhaust Indication.
Code #46: Vehicle Anti Theft Fault.
Code #51: Faulty Mem-Cal.
Code #52: Fuel Calpak Missing.
Code #52: (1990-91 Corvette Only): Engine Oil Temperature Sensor Low.
Code #53: System Over Voltage.
Code #54: Fuel Pump Circuit Low Voltage.
Code #55: Defective ECM.
Code #62: Engine Oil Temperature Sensor Circuit High.
Safety Car
Joined: Jan 2004
Posts: 3,783
Likes: 15
From: Northern California
Sounds like a bad Ignition Control Module.
Those are the exact symptoms when the Ignition Control Module gets old, the engine will die suddenly on the road and then start right back up when coasting in neutral.
It's located inside the distributor cap underneath the rotor.
Those are the exact symptoms when the Ignition Control Module gets old, the engine will die suddenly on the road and then start right back up when coasting in neutral.
It's located inside the distributor cap underneath the rotor.
Last edited by GKK; Jun 17, 2009 at 01:14 PM.
Thread Starter
Cruising
Joined: Jan 2006
Posts: 10
Likes: 0
Noone can find problem
The 85 Vette is still stalling. I took it to a GM dealership and they checked everything. They let it sit running without a stall and drove it around the parking lot without a stall. I picked it up and went to get on the highway. It was a little jumpy trying to get it to accelerate but didn't stall. I filled it up with gas and was going through town and again it stalled at a red light. This car doesn't like stopping at red lights without stalling. Any ideas.
