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Pcv, breather box help

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

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abscate
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Re: Pcv, breather box help

Post by abscate » Mon Jun 01, 2020 7:11 am

Intake manifold looks great, and that same stuff can clean the cat(s) too.

:D
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Re: Pcv, breather box help

Post by TyRawr » Mon Jun 01, 2020 11:51 am

They are blank no name coils. I will try and swap them around. And plugs I used bosch platinum. The ones with 4 prongs around the tips and set to recommended nm. The car starts and sounds beautiful on rev but has hiccups on idle And the car heaves in drive or reverse. Like one foot is on gas and one foot is pumping breaks And I have not done a compression test yet. I was looking into how to do that.

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Re: Pcv, breather box help

Post by - Pete - » Mon Jun 01, 2020 1:47 pm

If, after moving known good coils around, you still have misfiring cylinders I would double check your injectors, and then compression. HF has a very inexpensive compression tester. Accuracy isn’t critical, you just want to see somewhat uniform numbers at this point. Cold you should see somewhere around 90psi.
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Re: Pcv, breather box help

Post by chrism » Wed Jun 03, 2020 6:47 am

TyRawr wrote:
Mon Jun 01, 2020 11:51 am
They are blank no name coils. I will try and swap them around. And plugs I used bosch platinum. The ones with 4 prongs around the tips...
With as many misfire codes as you’re getting I wouldn’t be surprised if you don’t have ANY known good coils to swap around. But before dumping a bunch of money on new coils I would be inclined to replace those 4-prong platinum plugs with some good old copper core plugs at $2 a throw.

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Re: Pcv, breather box help

Post by - Pete - » Wed Jun 03, 2020 7:52 am

chrism wrote:
Wed Jun 03, 2020 6:47 am
TyRawr wrote:
Mon Jun 01, 2020 11:51 am
They are blank no name coils. I will try and swap them around. And plugs I used bosch platinum. The ones with 4 prongs around the tips...
With as many misfire codes as you’re getting I wouldn’t be surprised if you don’t have ANY known good coils to swap around. But before dumping a bunch of money on new coils I would be inclined to replace those 4-prong platinum plugs with some good old copper core plugs at $2 a throw.

+1
This is what I was getting at earlier. If you still have the original coils that were in there (Bosch/Volvo/Germany/Slovakia) you can identify (by trial & error) which ones are still good. Ohm’ing them is not a definitive test, so do not rely on it. Hopefully between your originals and the no-name ones you can get 5 of them. I would definitely get rid of the no-name coils though. Even used eBay Bosch coils are better than new no-name coils.
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Re: Pcv, breather box help

Post by TyRawr » Thu Jun 04, 2020 9:07 am

All good information. I'm going to swap around coils when I have time. Between new and old I have 11 coil packs to play with. And what difference will the spark plugs make? They're all brand new and like I said the car sounds amazing minus the misfire

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Re: Pcv, breather box help

Post by - Pete - » Thu Jun 04, 2020 11:48 am

Plain old single electrode/copper Volvo/Bosch plugs are time tested & proven, especially on turbo models. That being said, it’s most likely that your coils are the problem vs your 4-electrode plugs. Get know good coils in there and then proceed along to trouble shooting.
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Re: Pcv, breather box help

Post by TyRawr » Thu Jun 11, 2020 1:55 pm

Finally got time to do a compression. Here's the results. Everything looks spot on. Still thinking head gasket. Going to do a cylinder leakdown test later.
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Re: Pcv, breather box help

Post by TyRawr » Thu Jun 11, 2020 3:38 pm

I didn't have time to do the cylinder leak down test the other day but just had some time to so here's the results. I put 50psi on each cylinder with each piston at tdc. How do I read this?
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Last edited by TyRawr on Mon Jun 15, 2020 6:03 pm, edited 1 time in total.

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Re: Pcv, breather box help

Post by TyRawr » Mon Jun 15, 2020 5:07 pm

I also had a spark plug break inside a coil pack. Is this something that happens? I have no clue how it happened. But I know for a fact it just happened doing the cylinder leak down test.
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