Question about Chevrolet Corvette
There may be different reasons for the shut down. Please remem
If the engine starts and turns off after revving for few seconds, then there is often a problem with the fuel injected in cylinders. The engine is chocking, either because the mixture injected is incorrect (lean or rich), because there is incorrect fuel pressure to injector, or because of an electronic problem.
If the check engine light on the dash is turning on, there are diagnostic trouble codes stored in the PCM (main computer module). Before doing anything else is good to do a code scanning. If the vehicle was built after 1995, this can be done using a common OBDII scanner like this:Trouble Code Reader.
If the car starts, the scan can also be done for free at Autozone.
If there is a code stored, this can put you on track and help finding the fault
The first things I would check are injectors and fuel pressure. Injectors are tested using a noid light to check power to injectors, and checking spray. Fuel pressure is tested using a gauge in the port located on fuel pressure rail. You check pressure, and observe how pressure goes down after turning off the engine. You may found obstructions or a pressure regulator problem even if pump has been replaced. Here a complete kit including gauge and noid light: SG Tool Aid 36200 Kit.
Those are kind of preliminary tests. Now check the common faults that often cause your problem:
Check the wiring to crank sensor and the sensor itself. The sensor voltage is of the order of two hundreds millivolts. The crank sensor failure usually stores different error codes in the PCM.
If you haven't done it yet, ensure that all cylinders are sparking. This can be done disconnecting wires to spark plugs one at the time, and observing how the engine goes.
Common faults that can cause shutdown because of an incorrect mixture are the following:
Check MAP or MAF sensor (depending on the engine), and check IAT (idle air temperature) sensor if present. This sensors determine how much air is mixed with fuel. If they are dirty or defective, the engine may choke shortly after starting. Check also the air intake and filter.
Check the vacuum. If there is a vacuum leak, then the engine aspires air through the leak, and the mixture will be lean, with engine turning off. Vacuum is tested with the same gauge used for fuel. Place gauge in middle of vacuum lines and spray carb cleaner on the vacuum hose. If pressure goes up a bit, then there is a leak.
Check EGR valve. An EGR valve stuck open will result in a rich mixture because too much recirculated gas is allowed into the engine. Often the engine revs up and turn off.
Check IAC (idle air control) valve. A defective IAC system will idle too low and the engine turns off.
There are less common failures causing engine to turn off. First do a code scanning and check all the above. The code returned by the scan may already be enough to identify the problem.
Posted on Mar 13, 2011
Is the is carburetor or fuel injection? Have you checked for you fuel pressure. Could be a fuel pressure regulator. Spark, fuel, and air are the main things a car needs so start from the simple things and go from there.
Posted on Mar 13, 2011
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
May 23, 2017 | Chevrolet 1500 Cars & Trucks
Mar 21, 2010 | 2005 Chevrolet Aveo
Mar 08, 2010 | 1983 GMC K2500
Dec 23, 2009 | 2003 Kia Optima
Dec 05, 2009 | 1999 Ford Ranger SuperCab
Oct 12, 2009 | 1992 Ford F250
Apr 26, 2009 | 1985 Chevrolet Corvette
36 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: