Blown head gasket, sudden engine lope blowinmg huge vapors out of exhaust. Is there a chance the loping engine is cause by broken gasket and would it be worth attempting RXauto head gasket repair before completely discarding the car as is?

Easiest possibility would be a clogged fuel filter. One time I had a car that was loping and it was just 2 broken engine mounts. But could be a sensor or a bad cylinder as well. Need someone to help you decide which one is the culprit.

intake manifoold leak check all vacuum lines replace all vacuum lines if look cracked ,spark plugs could be fouled out by leaking fuel injectors, clean fuel injectors,replace fuel filter,replace air filter,replace spark plugs and wires,do tune up see if it helps if not.could have leaking intake manifold gasket or leaking egr valve,use engine vacuum gauge check engine vacuum for intake manifold gasket leaks.

HI. Engine loping at idle in a stock RS camaro will likely be caused by bad fuel injectors. The throttle body on your car has two large injectors and usually the drivers side will short out leaving the passenger side over-working. You can see this occuring if you remove the air cleaner lid and use a very bright flashlight to look at the spray pattern for both injectors. They should look the same roughly. There could be a vacuum leak at the MAP sensor hose, there could also be stuck open EGR valve as well, commonly there is a problem with the Engine Coolant Temperature sensor and wiring connector that may be the cause of your problem. As far as the vapor leak in the fuel system, check the fuel hoses near the gas tank and the smog canister under the hood for cracks or broken places. I have had to replace many fuel pump o-ring seals on these cars though. The spot where the fuel pump hanger mounts into the fuel tank has a large diameter o-ring that cracks and splits very commonly, also if the fuel pump was replaced, sometimes people don't quite get the seal to stay in place just right.

try pluging egr vacume hose fixed my problem also loped when going down road at steady speed. hope this helps

1. Vacuum leakage Check throttle body and intake manifold for tightness. check all vacuum hoses.
2. Faulty fuel or pump or electrical.
3. Plugged PVC valve.
4. Air filter clogged
5. Leaking head gasket.
6. Camshaft lobs worn.
All of these porblems can cause lopes or erratic idle.

ENGINE LOPING CAUSED BY.LEAKING BY VACUUM LEAKS AT THE INTAKE MANIFOLD.CHECK ALL BOLTS ON THE INTAKE MANIFOLD TO MAKE SURE THEY TIGHT.YOU COULD HAVE LEAKING EGR VALVE OR PLUGGED PVC VALVE.DO A COMPRESSION TEST TO CHECK FOR LEAKING HEAD GASKET.DO A FUEL PUMP TEST CHECK FUEL PRESSURE.IT SHOULD BE 35 - 45 PSI.IF FUEL FILTER HAS NOT BEEN REPLACED.REPLACE IT FIRST IF FUEL PRESSURE TO LOW.DIRTY FUEL INJECTORS WILL CAUSE LOPING.TIMING CHAIN WORN.IGNITION TIMING OFF AND WORN LEAKING VALVES.AND WORN CAMSHAFT LOBES.ALL ABOVE WILL CAUSE ENGINE LOPING OR SHAKING.

WEAK FUEL PUMP OR STOP UP FUEL FILTER.RESTRICTED EXHAUST LIKE STOPPED UP MUFFLER OR CATALYTIC CONVERTER.LOW ENGINE COMPRESSION.VACUUM LEAKS IN THE INTAKE MANIFOLD.BAD PLUGS.WEAK SPARK OR IGNITION .

You have blown a hose or a thermostat has stuck causing the engine to overheat, you may have blown a head gsaket as well it could be as simple as a radiator cap but suspect you blew the head gasket. SOrry hopes this helps, Be sure to tow it to the shop do not risk damaging the engine by driving it till you know what is wrong.

failed head gasket, do a compression test. berrydalewolf.

Check the exhaust manifold gasket. I have a 2003 SVT Focus I had a problem with it loping at low RPMs. I had a free flow exhaust system. When I bought a new exhaust manifold I replaced the gasket and the problem went away.