How does the C4 Corvette start and stop?

Brainiac Fact for C4 Corvette Start Sequence! The ECM also pulls the fuel pump relay which makes the contacts and parallel’s it electrically with the oil pressure switch. This way if the fuel pump relay fails you can still normally get the car to run.

What does closed loop mean on a corvette?

In simple terms X+X+X= Output “Y” The computer then switches to “closed loop” mode meaning the Oxygen sensor’s output is being referenced and being used along with the MAT and ECT outputs for the ECM to adjust the injector pulse widths (more “ms longer” or less “ms shorter”) to maintain a 14.7:1 air/fuel mixture.

How does the ECM work on a C4 Corvette?

What should the idle speed be on a corvette?

Initial engine idle speed of should be around 900-1100 RPM and then slowly decay to around 600-700 RPM unless the air conditioner is on at which case it will run at around 800-1000 RPM depending on pressure altitude. If this does not happen, the Idle Air Mixture Valve or IAC may be plugged or faulty.

Where is the oil pressure switch on a corvette?

Note that you should have a black color oil pressure switch/sender. This sender is mounted behind the distributor on the driver’s side. If its not replace it with one that’s only black. If the car fires then stalls replace this switch.

How to start a car that hasn’t run in a while?

Don’t attempt to start a car that hasn’t run in a while, follow these steps first BEFORE starting your car. See how a 72 corvette can get running again. DIY car repair with Scotty Kilmer, an auto mechanic for the last 50 years. Thanks for watching! 1. Bluetooth Scan Tool: http://amzn.to/2nfvmaD 2. Cheap Scan Tool: https://amzn.to/2D8Tvae 3.

What’s the name of the corvette that won’t start?

This article applies to the C5, C6 and C7 Corvette (1997-current). There is no greater buzz kill than a car that won’t start. Whether you’re just trying to get to work or the local autocross, a non-starting car can quickly turn a day of fun into a day of torment.

Why does my C4 Corvette engine not start?

The distributor outputs rotational frequencies to the ECM (Engine Control Module) as a result of the engine being rotated by the starter. This frequency continues as long as the engine turns (both starting and running) if no frequency output is present the engine will not run.

What should I do if my Vette won’t start?

Connect them to both batteries and wait at least five minutes to give the old battery some time to charge. Then, attempt to start the car again and let it run for a bit. If your battery holds a charge going forward, you are good to go. If the battery dies again, it could be going bad, or you may have another issue.

What’s the start sequence on a C4 Corvette?

Knowing these sequences will help you troubleshoot no start issues with your C4 Corvette. C4 Corvette Start Sequence begins when you first turn the key to the “on” position, the fuel pump will run for 2 seconds pressurizing the fuel rails.

What should the fuel pressure be on a C4 Corvette?

C4 Corvette Start Sequence begins when you first turn the key to the “on” position, the fuel pump will run for 2 seconds pressurizing the fuel rails. There is a Schrader valve on the passenger side fuel rail near the rear of the engine and proper fuel pressure after the pump runs should be between 40-42 pounds of pressure.

What causes a car to start and then die?

But if there is a fuel leak somewhere, then the proper amount of fuel won’t be able to make it to the combustion chamber. This might cause the engine to still start, but it won’t be able to keep it running. That is why it will die almost immediately after it starts.

What should the coolant temperature be on a C4 Corvette?

After the C4 Corvette Start Sequence is finished the Oxygen Sensor (mounted in the exhaust pipe) indirectly is considered to have reached operating temperature of several hundred degrees when the Manifold Air Temperature (MAT) sensor shows an intake air temperature of more than 140 degrees and the Engine Coolant Temperature (ECT) is 160 degrees.

Why is there no SES light on a 1984 Corvette?

This pulsing action prevents too much EGR gas from entering the engine and causing an overly lean condition. GM did not have to monitor EGR operation closely on the 1984 vehicles so there is no Service Engine Soon (SES) light illuminated if the system fails. The 1985-1989 Corvette was a different story.

What was the safety feature of the 1968 Corvette?

If you accidentally shorted a major electrical artery under the hood, there was no stopping it until the battery was disconnected and the ensuing fire was extinguished. 1968 brought many new safety features to every vehicle including the wiring.

How does the wiper motor work on a corvette?

78-82 Corvette wiper motors control the wiper, delay and wash through the switch while current is supplied to the wiper motor by a stand alone wiper delay module. 84 and up Corvettes have the control switch supply power to all electronics on the wiper motors exterior plastic cover controlling wiper speed]

What’s the problem with my 1989 Corvette Vette?

No noticeable performance issues, the light just comes on, it … The top on my 1989 Vette won’t release when I pull the release handle. It comes open on the passenger side but not the driver’s side. What can I do?

Why are the vents on my Corvette breaking off?

It is common for the ports to break off as they become brittle due to age and temperature, when that happens the system defaults to defrost mode for safety reasons. In the pictures below the valve is the black and white plastic piece with three hoses attached, yours may look slightly different.

What kind of car was the 1984 Corvette?

“When we compared our car against the Porsche, I can tell you there were a lot of good feelings at Chevrolet.” For those who expected the 1984 Corvette (yes, ’84—it will be marketed as such for eighteen months) to be a cross between a Lamborghini Countach and an F-16, there will be disappointment.

Why does my car stall after a few miles?

When a bad module is responsible for an intermittent stalling problem, the engine will usually cold start just fine and run OK for short distances, but stalls after driving more than a few miles or when driving at highway speeds (especially during hot weather). It’s as if somebody suddenly turned off the ignition.

Is there check engine light for intermittent stalling?

Many times, there will be no check engine light and no fault codes to give you a clue as to what might be causing the engine to stall. So the trick to diagnosing an intermittent stalling problem is to catch the vehicle when it’s acting up — and that rarely happens when you have the vehicle in your shop.

Can a stalling engine be intermittent driveability?

Intermittent driveability problems of any kind are always a challenge to diagnose. When a customer brings you a vehicle and complains of a stalling problem, you may not have much to go on other than their description of what’s happening and when it happens.

When did GM start using MAF system in C4 Corvette?

GM used this approach in the 1990 and 1991 L-98 engines and in the 1992 and 1993 LT-1 engines. With the 1994 model C4, they went back to the MAF system. Note that MAF based systems are far more accurate since they measure air flow directly whereas the MAP system calculates air flow indirectly.

Why does my car run when the ignition is turned off?

With the ignition turned off and the car continuing to run, simply remove the plug from the alternator (DO NOT TRY AND REMOVE THE BATTERY POWER WIRE FROM THE POWER STUD!) and the car should shut off if the alternator is creating the problem. If it does not stop running, your feedback problem is coming from something other that the alternator.

Is it hard to start a 1988 L98 auto?

1988 L98 Auto. recently aquired. hard to start from cold start. literally 3-7 seconds on the starter. New wires, not plugs. new cap and rotor. trust me being a Jeep guy I know oil smoke smell. Once she is running, she starts slow then idles fine. after that no performance issues.

What causes a car to click when trying to start?

1 Battery Drained. First, did you leave the headlights or an interior light on, or something else that drained the battery while you were sleeping? 2 Cables, Connections and Corrosion. Second, check the clamps for the cables connected to the battery. 3 Bad Battery. 4 Alternator Issues. 5 Starter Motor. …

What does it mean when your corvette won’t start?

When a starter goes bad, they will usually not give you much warning first. Also, if you are stuck somewhere and are trying to start your Corvette, the old beat the starter with a hammer trick is not a wives tale. It really can get that one last start out of it. There are a lot of issues that can cause your Corvette to crank, but not start.

Where are the ignition fuses on a corvette?

Check the fuses used in the PASS-Key system. There are three, #14 CRK, IGN 2 #50, and Starter #52, that should be hot at all times. These are all located in the passenger side footwell. Next, check the key resister sensing terminal located inside the ignition lock cylinder.

Where is the hot starter on a corvette?

There are three, #14 CRK, IGN 2 #50, and Starter #52, that should be hot at all times. These are all located in the passenger side footwell. Next, check the key resister sensing terminal located inside the ignition lock cylinder. There should be a 5-volt signal coming to the terminal when the key is inserted in the ignition.

Why does my Corvette Vette not start up?

A lack of fuel pressure will prevent the car from starting. Check your fuel pressure. If you have zero pressure, the car won’t start. Check relay number 35 in the engine compartment fuse box, which controls the fuel pump.

What should the oil pressure be on a C4 Corvette?

The reading will drop to 38-40 pounds after the engine is running. Initial C4 Corvette Start Action: Once rotating the key to the start position if the anti-theft system has not disabled the starter the engine will rotate. Once the oil pressure has reaches 4 PSI, the oil pressure switch contacts will close allowing the fuel pump to run.

Is it safe to jump start a push button ignition?

Do take note, however, that if either car has a fully electronic ignition system, it is not generally recommended that you jump start it as the jumper cables may damage the ignition system. As such make sure that you and the donor’s vehicle are safe for the jump-starting process.

How much does it cost to replace a corvette starter?

Connect a volt meter to the purple wire on the relay. If it reads 12 volts, the problem is with your solenoid. The good news is, this is much cheaper than replacing the starter itself. Starters can also be tested for free at AutoZone. The cost of a replacement starter is around $2-300, and the rest of the charge reflects labor time. Figure 2.

What kind of power does the L48 Vortec have?

L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/[email protected], 112 LSA, Eagle Steel Crank. The purple wire goes to the small terminal on the solenoid that is closest to the engine block.

How does the C4 Corvette start and stop?