Help!! Cold start idle problem

4.2 V8 32v Naturally Aspirated - 414 bhp
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GhiniRS4
Neutral
Posts: 28
Joined: Tue Dec 12, 2017 12:57 pm

Help!! Cold start idle problem

Post by GhiniRS4 » Mon Mar 16, 2020 5:00 am

Hello everyone

Does anyone have a cold start idle problem?

My car the video
https://youtu.be/lzcg7vH49wI

A few minutes later the idle will be okay or the second start is okay too. Above, I feel losing the cold start program.

Please help!!

Thank you
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Quango86
2nd Gear
Posts: 151
Joined: Thu Jan 31, 2019 2:08 pm

Re: Help!! Cold start idle problem

Post by Quango86 » Mon Mar 16, 2020 11:22 am

GhiniRS4 wrote: ↑
Mon Mar 16, 2020 5:00 am
 Hello everyone

Does anyone have a cold start idle problem?

My car the video
https://youtu.be/lzcg7vH49wI

A few minutes later the idle will be okay or the second start is okay too. Above, I feel losing the cold start program.

Please help!!

I would be checking the maf or idle control valve. Best to get a scan done and check what readings your getting.

Thank you
B7 saloon, koni Shocks and h and r springs, h and r spacers 8mm f+r, milltek non res with valves, milltek d/ps, k and n filter, full mrc carbon clean, mrc stage 2 with l/c and f/s 456bhp 522nm.
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GhiniRS4
Neutral
Posts: 28
Joined: Tue Dec 12, 2017 12:57 pm

Re: Help!! Cold start idle problem

Post by GhiniRS4 » Tue Mar 17, 2020 7:06 am

Quango86 wrote: ↑
Mon Mar 16, 2020 11:22 am
GhiniRS4 wrote: ↑
Mon Mar 16, 2020 5:00 am
 Hello everyone

Does anyone have a cold start idle problem?

My car the video
https://youtu.be/lzcg7vH49wI

A few minutes later the idle will be okay or the second start is okay too. Above, I feel losing the cold start program.

Please help!!


Thank you
I would be checking the maf or idle control valve. Best to get a scan done and check what readings your getting.

Thank you for your reply

So I spend a week on the test. Every time the test I need to wait for a car cold down. Finally, the problem solved today!

I check the MAF, ECU, Test vacuum leak (use the Smoke machine)... The problem is the solenoid valve. The problem not easy to find it, because it isn't obvious in the Smoke machine test.
EGR.JPG
1177656.jpg
1177663.jpg
Thank you, everyone. I thought I can not find it, until yesterday I ask on here.

I hope this problem can help need friends.

Thank
Top
Quango86
2nd Gear
Posts: 151
Joined: Thu Jan 31, 2019 2:08 pm

Re: Help!! Cold start idle problem

Post by Quango86 » Tue Mar 17, 2020 9:51 am

GhiniRS4 wrote: ↑
Tue Mar 17, 2020 7:06 am
Quango86 wrote: ↑
Mon Mar 16, 2020 11:22 am
GhiniRS4 wrote: ↑
Mon Mar 16, 2020 5:00 am
 Hello everyone

Does anyone have a cold start idle problem?

My car the video
https://youtu.be/lzcg7vH49wI

A few minutes later the idle will be okay or the second start is okay too. Above, I feel losing the cold start program.

Please help!!


Thank you
I would be checking the maf or idle control valve. Best to get a scan done and check what readings your getting.

Thank you for your reply

So I spend a week on the test. Every time the test I need to wait for a car cold down. Finally, the problem solved today!

I check the MAF, ECU, Test vacuum leak (use the Smoke machine)... The problem is the solenoid valve. The problem not easy to find it, because it isn't obvious in the Smoke machine test.
EGR.JPG
1177656.jpg
1177663.jpg

Thank you, everyone. I thought I can not find it, until yesterday I ask on here.

I hope this problem can help need friends.

Thank
Glad you found it!
B7 saloon, koni Shocks and h and r springs, h and r spacers 8mm f+r, milltek non res with valves, milltek d/ps, k and n filter, full mrc carbon clean, mrc stage 2 with l/c and f/s 456bhp 522nm.
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mikep99
4th Gear
Posts: 716
Joined: Fri Jul 17, 2015 9:03 am

Re: Help!! Cold start idle problem

Post by mikep99 » Tue Mar 17, 2020 10:20 am

Good to know - thanks :)

Mike
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