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I have a Galant 2003 with a 2.0l 4G63 engine. Since I refueled my car, issues started to arise.

First the car gave sudden knock and the engine check light turned on. From then onward, the car's performance dropped to nothing, which was fixed by an engine tuneup reset and an inclusion of Soltron fuel treatment enzyme.

But after that, I have noticed that the car's cold start was not as it used to be. I have to start the car at least two times, as on the first cold start the RPMs drop and the car turns off.

I don't know if this is cause by the failure of the air flow sensor, the tuning or the battery or if it is an entirely another problem. What should I be looking for?

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    If the only indication is problematic cold starts, maybe the mixture isn't rich enough, for whatever reason.
    – Paul
    Commented Sep 29, 2014 at 20:17
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    My first thought is you need to do a throttle position sensor (TPS) reset, but that's just a gut check. The idle air control valve may need to be cleaned as well. Commented Sep 29, 2014 at 21:19
  • @Paul May be thats the case. I will be filling her up with a higher octane from a different gas station aswel and try my luck :) thank you for the response Commented Sep 30, 2014 at 2:50
  • @Paulster2 Thanks for the response :) I will take it to the garage and get these checked.. hopefully nothing serious :) Commented Sep 30, 2014 at 2:51
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    Could be that your EGR is malfunctioning. Commented Sep 30, 2014 at 3:32

2 Answers 2

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Try to use some acceleration after start (about 10% of throttle pedal). If it helps then check your idle air control valve

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  • Thank you very much for the reply :) i will get this checked and post back asap Commented Sep 30, 2014 at 8:22
  • "which was fixed by an engine tuneup" - do you mean ECU tuneup? Your idle valve might be controlled from ECU, so it can be also related to ECU setup (firmware) and valve itself is totally ok. Please also check wiring to valve wasn't it forgotten to connect Commented Sep 30, 2014 at 14:31
  • ohh okey will do :) I am not pretty sure which..but the reset was done by resetting the settings via a device connected to the car from the obd2 port :) Commented Sep 30, 2014 at 16:00
  • Hi, giving a bit of gas as soon as the car starts gets rid of the issue.. I think your solution most probably work.. I will get this checked :) thanks again Commented Oct 1, 2014 at 8:28
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I've seen these symptoms once before. In that particular case it turned out to be a failing igniter/power transistor. Went on for nearly 2 years before the cause was isolated, but the igniter module had developed a crack and was arcing badly on first start, but somehow working properly on second start.

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  • Thank you very much sir. with this info i can now quickly ask the garage to check on it..thank you very much :) Commented Sep 30, 2014 at 15:58

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