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Hard start-gas smell-no codes

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Old Nov 22, 2018 | 03:25 PM
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Default Hard start-gas smell-no codes

Hi all;

Happy Thanksgiving to the forum. I have an issue with my car starting-initial idle. Occasionally my car will struggle to start. When this occurs i can smell a strong gas smell as if a rich air-fuel mixture. Then the car may idle slow and almost die unless I give it a little pedal. No DTC Codes located. One time a while ago I got a MAFS Code when travelling at high speed but nothing now. Any thoughts? Thanks!

Last edited by Pjduto; Nov 22, 2018 at 03:26 PM.
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Old Nov 22, 2018 | 05:50 PM
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Originally Posted by Pjduto
Hi all;

Happy Thanksgiving to the forum. I have an issue with my car starting-initial idle. Occasionally my car will struggle to start. When this occurs i can smell a strong gas smell as if a rich air-fuel mixture. Then the car may idle slow and almost die unless I give it a little pedal. No DTC Codes located. One time a while ago I got a MAFS Code when travelling at high speed but nothing now. Any thoughts? Thanks!
Happy Thankgiving !!...Ahhh, Port Charlotte...beautiful area of FLA to retire !!...I'll be seeing you in a few years...LOL !!!....well, without throwing on a scan tool on it it's going to be a little hard to diagnose....would be nice to look at your fuel trims and O2 sensor activity and some other important data PIDS...if it is running rich can be caused by a bunch of things...dirty MAF sensor (over reporting airflow...the fuel trims will be negative), an injector stuck open...listen if your can hear your injectors "clicking" while it's running (use a long screwdriver to listen), O2 sensors don't affect "fueling strategy" until the engine is in "closed loop" ...usually takes about a minute or so but if the sensor is reporting "RICH" (your fuel smell) above 450mv it would start "taking away" fuel resulting in a rough idle...you can try cleaning your MAF sensor, make sure your air filter (OEM or CAI) is clean and listen for those injectors clicking away !!

Last edited by C5 Diag; Nov 23, 2018 at 01:05 PM.
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