Accent MC (2006-11) :: Intermittent Hard Start After Trying 2 To 3 Times
Nov 15, 2015
I have a 2009 Accent. Last year I started to have a hard start issue, very intermittent. It eventually got worse this year.
During the cold, it was never an issue, but during the summer damp or rainy days it occurred quite frequently.
It would turn over, but never start. If I pressed the gas peddle while starting it up, it usually would start the 2nd or 3rd time.
I changed the usual start up components; plugs, ignition coils, cam shaft position sensor, crankshaft sensor, and cleaned the throttle body.
None of those changes worked for the startup. When I removed my throttle body to fully clean it again, I noticed there was an extra air channel into the engine from the TB. Following this, I found the ISCA.
Removing, taking apart, and cleaning the idle speed control actuator seemed to have fixed the issue. It was so caked up with carbon deposit/build up, it couldn't fully rotate.
I used the throttle body cleaner to clean it out and then it began to spin freely (I removed it from the black sensor part first).
Since putting it back altogether, I haven't had a start up issue since.
Here are the notes from the service manual .....
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Gremlin that causes the car to take a few tries to start when it is cold or damp? I've read that the crank sensor and fuel pump/fuel injection relays are possible culprits, but since the crank sensor is almost $100 I'm hesitant to throw money at an intermittent problem without a 100% diagnosis
-No codes in computer
-Brand new battery
-Mint NGK Platinum spark plugs
-Runs like a top once it starts
-5W20 synthetic oil
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Here is what I have checked thus far.
All injectors ohm out exactly at 15.1
-Fuel pump primes at key on like it should
-Verified cam/crank are timed properly (timing belt didn't slip a tooth)
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