Changed 02 sensor spark plugs gas cap and had major tune up...unplugged battery. ij dont know at this point what to do. i also get oil changed every 3000 miles. im at 94000 miles..any suggestions?
SOURCE: 2005 chevy cobalt 2.2 is running rough (putting)
Number three cylinder is miss fire,it does not mean it is the coil,although it could be,remove the coil,and boot,and spark plug,inspect them to see if the plug,or boot look bad,replace the spark plug,and if the boot is burned or distorted,replace it,a fuel injector can cause a miss fire also,but change the spark plug and see if this solves the problem,if not replace the coil,if it is a dead miss,then the coil might be bad,as for the water in the fuel ,the cap is missing,,and 5 dollars worth of HEET will not hurt,also,fuel from the fuel station,can have water in it.It happens a lot.
SOURCE: 2006 Chevy Aveo Check Engine Light coming on and off
It needs a code scanner hooked up to it,to tell you why the light is on and the cause. If there is an autozone near you take it there or
call different auto part stores to find out if they do that.Without getting the code, it's just guessing what the problem is.
SOURCE: cobalt no spark
I was going to say crank sensor, but you changed it. What have you done to it latley? Or did this just start? I kinda want to say PCM for some reason. Any welding done on the car latley?
SOURCE: PO420 CODE ON CHEVY S10
Hi
The code means---
Catalyst Efficiency
Below Threshold
(Bank 1)
Please make sure there is no air entering the engine behind the maf, such as a vacuum leak or leaks in ducting between the maf and the throttle body.
If that's no the case then its an issue with injectors clogging and they are not working due to "fretting". This "fretting" is electrical terminals to injectors getting oxidation on them and is fixed by unplugging them and replugging them in. The fix is to put a small dab of die-electric grease on the terminals.
I would suggest an injector service with the new GM procedure using "Top Engine Cleaner". This may be all you need but that P0420 bothers me. P0420, Catalyst System Efficiency Below Threshold, can be set by a poor connection at the PCM or a damaged wiring harness.
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Thanks
Rylee
SOURCE: engine light stays o n my 2006 impala
after 3 warm-up cycles the check engine light will go out if it does not see a problem
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