Stalls When cold
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From: North Gower. Ontario
Stalls When cold
a problem came up after replacing an ignition switch, the car starts fine and idles fine but stalls when putting a load on it when it`s cold (starting to drive).
there are two things I did before and after replacing the switch that might cause that:
1. starting the car with starting fluid (damaging the MAF maybe)
2. cleaning the engine bay and under the fuel rail with degreaser and water (spray bottle not pressure washer)
there are two things I did before and after replacing the switch that might cause that:
1. starting the car with starting fluid (damaging the MAF maybe)
2. cleaning the engine bay and under the fuel rail with degreaser and water (spray bottle not pressure washer)
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You have other issues going on if you need starting fluid to start a C5!! Id start by getting some specific MAF sensor spray cleaner, and go from there. I dont know what exactly the issues are, but just sayin'.....
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From: Cape Coral, Florida
Without at least a scan tool to look at live data this may be a little difficult to diagnose…you can try disconnecting the MAF sensor and see if it does the same thing….it may throw a DTC when you disconnect but just clear it after you reconnect it.
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From: North Gower. Ontario
I do have a scan tool
But what am I looking for?
Last edited by biker_il; Aug 4, 2022 at 04:47 PM.
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When I see driveability issues when cold the first thing I look for are ECT (engine coolant temp) issues...does your scan tool have a generic function (looks like a check engine light) where you don't enter the cars year, model etc...these scan tools have 2 ways to look at live data...factory and generic OBD2...on the factory side your ECT might look OK but if you look at the generic side the PCM can't substitute coolant temps...we call this "substituted values"....if you let the car warm up to operating temp no issues ??
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Joined: May 2021
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From: North Gower. Ontario
When I see driveability issues when cold the first thing I look for are ECT (engine coolant temp) issues...does your scan tool have a generic function (looks like a check engine light) where you don't enter the cars year, model etc...these scan tools have 2 ways to look at live data...factory and generic OBD2...on the factory side your ECT might look OK but if you look at the generic side the PCM can't substitute coolant temps...we call this "substituted values"....if you let the car warm up to operating temp no issues ??
no issues at all ....
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From: Cape Coral, Florida
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From: North Gower. Ontario
.. but temps were ECT -50c . ECT start 39.. IET 29 it`s about 28 outside all Celsius
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I don`t quite understand "generic/global OBD2", the scan tool is connected to the OBDII port in the car.
I want to mention something. it seems like the stall is not because of lack of power, it just that the car shuts down when releasing the clutch and putting load on it.
Last edited by biker_il; Aug 5, 2022 at 08:30 AM.
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From: Cape Coral, Florida
Ambient temp is 22c.
I don`t quite understand "generic/global OBD2", the scan tool is connected to the OBDII port in the car.
I want to mention something. it seems like the stall is not because of lack of power, it just that the car shuts down when releasing the clutch and putting load on it.
I don`t quite understand "generic/global OBD2", the scan tool is connected to the OBDII port in the car.
I want to mention something. it seems like the stall is not because of lack of power, it just that the car shuts down when releasing the clutch and putting load on it.
Last edited by C5 Diag; Aug 5, 2022 at 08:56 AM.
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From: North Gower. Ontario
This may be the infamous 2 MPH cutoff when you let out the clutch…do you also sometimes see a “pull key wait 10 second” message when the car stalls ??…this usually happens when the engine is hot or cold…an LMC5 ordered from Amazon fixed my issues years ago…getting back to global/generic when you connect your scan tool do you have to enter make, model year, transmission type ??…this is getting in on the “factory” side of the scan tool…if your scan tool also has that check engine light symbol without having to enter the make, model year…that is generic/global !!…did you try disconnecting the MAF ??
https://youtu.be/vStqqaEQe9Y
https://youtu.be/vStqqaEQe9Y
the scan tool recognize that the car is a 2003 Chevrolet corvette but asks for body style and transmission type. (attached screenshot)
i don`t think there is an option for generic/global, it either recognize the car automatically or you have to enter it manually.
just tried to disconnect the MAF and there is no change.. still stalls
Last edited by biker_il; Aug 5, 2022 at 09:38 AM.
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From: Cape Coral, Florida