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Old 05-30-2019, 08:08 PM   #4
blue62
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Join Date: Aug 2018
Location: Woodland Wa
Posts: 242
cold start problem with no codes.
I would look at the temperature sensor signal with a durametric or better yet an oscilloscope and someone who is good at reading them. could be a lazy signal from the temp sensor.

I was going to say do the same with the MAF sensor but I see you changed it out.

These are just guesses on my part. But given it is a cold start problem with no codes it is where I would start.

just thought of this.
Very first thing I would do is a vacuum test both dead cold. (see if you can get someone to hold the RPM at a steady level). And warmed up. try to take vacuum readings at lowest RPM the car will run at cold.
You could have a vacuum leak this seals up once the engine is warm.

Last edited by blue62; 05-30-2019 at 08:11 PM.
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