07-27-2022, 05:24 PM | #1 |
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Car wanting to stall on cold start
I've made a post about this before but I never really got around to showing what this was actually like and never got a solution
So I'm gonna try again Ever since I cleaned my MAF's and got downpipes installed, my car started doing this [IMG]https://streamable.com/hpj9f1[/IMG] https://streamable.com/hpj9f1 This video shows it best although at times it actually stalls out I don't tap the throttle, I know it seems like I did but I didn't that's just the car correcting itself Any insight on this ? If anyones experienced similar issues? This only happens on cold starts Car is on a stock map |
07-27-2022, 09:08 PM | #5 |
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So I didn't actually do the install myself it was done at my Indy shop, but I did check the main two 02's that I can reach, I haven't looked at the ones on the lower side of the downpipe but I feel like a bad o2 installation or a bad o2 would throw a code no?
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07-27-2022, 11:20 PM | #7 |
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So you are running catless down pipes I would assume. Did you get tune? On cold start car is running rich to warm up the cats as fast as possible to pass emission. If you removed the cats and didn't get tune I am not surprised you have an issue in cold start. Also, I am sure someone from Florida and California will post how they don't have this issue. both of those state don't really start their car in temp below 50F
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07-28-2022, 02:48 PM | #9 | |
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Yes, running cats without a tune isn't the ideal way but at the same time that's only if the cars ecu knows there is no cats, as of now I don't have an engine light for the no cats so technically speaking the ecu thinks the cars the same as normal, but yes I did consider that a possibility that it's because it's not tuned Also I do live in California so that doesn't really matter It just astounds me that this only happens when I initially cold start the car after a full night, when I go to work and the car is off for 8 hours, it starts up just fine. |
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07-28-2022, 02:49 PM | #10 |
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It's a hassle of leaving it with them since this is my daily driver, I don't mind DIYing this and figuring it out myself I just don't want it to be something like injectors, but I feel it's more a sensor or a loose connection
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07-28-2022, 02:55 PM | #11 |
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I know what you mean. You've checked the crank case ventilator hoses, intake connections, ecu connections (including the ground wires under the ecus), o2 sensors, and maf sensors?
That's pretty much all you touch when you install downpipes. Did the behavior change in any way when you got new mafs? |
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07-28-2022, 02:58 PM | #12 | |
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Nope, but the funny thing is these problems began as soon as I cleaned the god damn MAF sensors that's what made me believe changing the MAF's would clear up the issue I'll probably look more into the intake/maf area see if anything is off |
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