Odd Cold Start

[bhoom_S54]

My car always had since I've purchased it. When doing a cold start, the car quickly dips in rev once or twice and then everything is normal.
Any thoughts?

https://youtube.com/shorts/RGe3jdrtQQI?si=971eS8aQDmytHaVz

[4getr34]

I just had a similar issue. I check and clean maf, ICV, fuel injectors throttle body intake ports. no dice, problem got worse eventually and it turned out to be the checkvalve on the SAP. I just deleted it.

[bhoom_S54]

I just had a similar issue. I check and clean maf, ICV, fuel injectors throttle body intake ports. no dice, problem got worse eventually and it turned out to be the checkvalve on the SAP. I just deleted it.

Sounds good. I'll give this a go.

[chalaka]

I just had a similar issue. I check and clean maf, ICV, fuel injectors throttle body intake ports. no dice, problem got worse eventually and it turned out to be the checkvalve on the SAP. I just deleted it.

do you have a picture of this check valve?

did you just remove the complete SAP , the rounded thing next to the header / windshield washer location?

thank you

[bagger]

Probably talking about this. I had to replace all my SAP stuff as well.

If you mess with it, may as well order the hose at the same time. Mine cracked.

[bhoom_S54]

Probably talking about this. I had to replace all my SAP stuff as well.

If you mess with it, may as well order the hose at the same time. Mine cracked.

I believe there is another backflow valve under the windshield wiper as well

[bagger]

I believe there is another backflow valve under the windshield wiper as well

I forget, but it might depend on the year. Mine is an 04 and it's a simple SAP setup - the fan thing, a hose, and the check valve. I believe older cars might have an extra vacuum line or something somewhere.