Why does my car backfire when the starter quits?
Sometimes the backfire is a couple seconds after the engine quits turning. The engine was dead cold (never got it started) & it was like 35 degrees out. I will try & confirm tomorrow if I am getting spark while the starter is cranking. Also, the bad fuel theory has merit I suppose.
Why does my Car start but no spark?
Well, I will check that, but the CAS has not been off this car EVER. If the CAS failed, could it cause this? As I sit here & think things through, it’s as if while the starter is engaged (or maybe when the ignition switch is in the start position) it has no spark.
What should I do if my engine won’t fire?
Check your CAS, i would say you have it one backwards if its been off, take it off spin the key 180* and bolt it back on to test that theory, sounds like its firing when the valves are open. Click to expand… Thanks for the ideas. Well, I will check that, but the CAS has not been off this car EVER.
Why does my car make a loud backfire when it starts?
The backfire seems to be caused by a spark AFTER the key is released from the start position. I’m guessing it pops because the engine has stopped turning so the pressure is forced out the exhaust of whatever valve is open. Just my theory, but I definitely noticed a spark after the key was released as I was checking it.
How much does it cost to fix a Pontiac Firebird?
The the key and ignition lock cylinder must be replaced to correct this condition. The average cost for a Pontiac Firebird No Start Diagnosis is between $88 -$111. Learn More Good news! We found 32 RepairPal Certified shops near you.
Why does my car not start when I crank the engine?
If the engine doesn’t crank, or makes an unusual noise when cranking, you may have a starting system problem. The car’s security system may have made an error that disabled the fuel or ignition system, or the chip in the key may have failed.
Why is the security light on on my Firebird?
GO to start and hear fuel pump go then turn key more and hear click. Security light turns on with nothing else happen. Tried unplugging battery and reconnecting with no luck. Later I will try to start and car fires right up.
What should I do if my car won’t start?
Ask an assistant to turn the ignition key to the On position, but don’t start the engine. As your assistant turns the key, listen closely through the filler neck of the fuel tank. You should hear the whirring sound of the fuel pump motor being energized for two or three seconds.