There are many reasons why an engine should spit back through the carb. I once encountered a Ford that had a worn exhaust lobe on the camshaft so the valve was barely opening - the engine ran very well until the throttle was opened. It is still a huge mystery how the owner had managed to drive it to my workshop.
The most common reason is a lean air/fuel mixture caused by one or more carb jets being blocked.
A thorough carb clean is a sizeable task that shouldn't be undertaken lightly and it is best practice to tackle it last after ensuring everything else is as the manufacturer intended it to be - from spark plugs and spark power/quality, timing, valve operation, fuel delivery quantity and pressure, etc., etc.
SOURCE: my V6 1992 PATHFINDER IDLES RICH AND SURGES AT IDLE.
You need to Replace your Gas Cap. The Seal is worn and it is allowing Air to get inside the Fuel tank Causing your Rough Idle.
SOURCE: P0301 - Cylinder 1 Misfire Detected on a 1998 s-10 idles rough
Sounds like a bad fuel injector. Shop would need to run a contribution test to confirm. I must say, good detective work, good luck.
SOURCE: 2003 tahoe idles rough and stalls
might want to check your mast air flow sensor. if your check eng. light is on have the codes downloaded
SOURCE: i have a couple codes P0335,P0385,P0171,P0174. My
Resolve trouble codes and try again, if car runs ok no problem if not, write again.
92 views
Usually answered in minutes!
×