Cold start issue 2004 s40 1.9L T5

Post by **alschnertz** » 28 Dec 2019, 16:09

I forgot to mention the PTC nipple. It attaches into the hose that runs from the MAF sensor to the turbo.
I think that can get pretty oil-fouled over the years and may no longer make a tight seal. Hence you'd have a vacuum leak there.
Here's a link...
viewtopic.php?t=36184

Just a thought.

boosteds40 · Post by **boosteds40** » 30 Dec 2019, 14:28

I just did a vacuum test, and I also have a pretty big vacuum leak, I further found out that my intake manifold gasket had slipped down when I installed it.
Everything is good now, starts right up

FunkadelicxS40 · Post by **FunkadelicxS40** » 16 Jan 2020, 21:07

I replaced the IAC unit and the problem has resolved. I bought a cheap aftermarket one since the Volvo one is 150$. Kept my old one just in case, but it seems fine now.

Post by **alschnertz** » 17 Jan 2020, 03:44

Not a fan of cheap aftermarket parts, but sometimes you have no choice.

Regardless, nice to hear it's fixed.

boosteds40 · Post by **boosteds40** » 17 Jan 2020, 13:06

Thats great! glad to hear you resolved your problem.

Cold start issue 2004 s40 1.9L T5

Re: Cold start issue 2004 s40 1.9L T5