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Old 03-15-2014, 11:17 PM   #1
dlacacres
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Default 2001 Hard Starting in Cold Weather

I have a 2001 SL2 that will only start cold when accelerator is depressed fully. ECTS is new and brass and the connector is fine as well. Once it starts and achieves idle, after holding accelerator pedal in position, the car runs fine.

Any leads?

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Old 03-15-2014, 11:49 PM   #2
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2003 L-Series 3.0L Sedan
Default Re: 2001 Hard Starting in Cold Weather

What's fuel pressure? When were plugs replaced? Throttle clean? What's cold engine rpm? Warm?

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Old 03-16-2014, 08:17 AM   #3
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Default Re: 2001 Hard Starting in Cold Weather

Plugs are new. First item I replaced. No fuel pressure gauge, but with key on, I get a small burst of fuel when depressing the schrader valve. After getting car to idle (less than a minute), cold idle is about 875rpm. Operating temp idle is 1000rpm.

I have another 2001 SW2 and the idle was 1200rpm cold, 975rpm operating temp.

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Old 03-16-2014, 09:13 PM   #4
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Default Re: 2001 Hard Starting in Cold Weather

With both cars, cold engine idle should be around 1200 rpm and warm idle around 800-900 rpm. The temperature gauge needle should be at 3/8ths position, between the 1/4 and 1/2 marks. If close to the 1/4 mark, replace the thermostat. A worn out t-stat won't give good heater output. Cold running T-stats can cause rich running/higher than normal idle too.

Virtually all EFI engines never need anyone to use the gas pedal for starting - electronics almost guarantees instant starting in cold or hot weather. Its the most valuable feature for trouble free starting.

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Old 03-17-2014, 05:57 AM   #5
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Default Re: 2001 Hard Starting in Cold Weather

Thanks for the info, but I'm having a hard time understanding how a thermostat would affect an initial cold start. Can you clarify? It seems to me that some data is not being fed to the PCM on start-up. Once you get past the starting issue, the vehicle runs normal.

Last edited by dlacacres; 03-17-2014 at 06:02 AM..

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Old 03-17-2014, 12:30 PM   #6
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Default Re: 2001 Hard Starting in Cold Weather

I threw out replacing the t-stat as something to look into with this issue. Pedal shouldn't be needed for almost any start. Forced to use pedal implies something wrong and suggests; throttle position sensor, dirty throttle body air intake, coolant sensor, map sensor, idle air control valve (in the throttle body), etc..

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Old 03-18-2014, 06:17 AM   #7
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Default Re: 2001 Hard Starting in Cold Weather

Thanks, I'll be out of town for a while, but I'll get into it when I return.

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Old 04-03-2014, 11:10 PM   #8
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Default Re: 2001 Hard Starting in Cold Weather

Prior to leaving out of town, I had some other work to do on the car (Hub Bearing), so I decided to pull the PCM-B fuse while I did the hub. The car now starts perfectly fine after resetting the PCM. Huh...go figure.

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Old 04-03-2014, 11:28 PM   #9
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Default Re: 2001 Hard Starting in Cold Weather

PCM reset eh? Sometimes the easiest things are overlooked. At least in my mind's eye as it never occurred to me to suggest pcm reset. We can guess what was done to make the pcm start all over again but the important thing is that you tried something that worked and deserve all the credit. Thank you for following up and posting your results.

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Old 04-07-2014, 04:51 PM   #10
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Happy Re: 2001 Hard Starting in Cold Weather

Thanks. It's been a week now and is starting fine.

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