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2002, V70, 2.4t and the dirty rotten throttle body

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equiprx
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Joined: Fri Jan 06, 2017 5:02 pm
Year and Model: 2002 v70, 24t
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2002, V70, 2.4t and the dirty rotten throttle body

Post by equiprx »

Does anyone with actual Volvo mechanical credentials know how I can spray Sea Foam Spray or another product into the intake/throttle body without removing it? The stuff will kill the MAF sensor and probably other important stuff.
I have been trying to get the P0068 & P0221 codes to go away.
My car is a 2002, V70, 2.4t and the throttle body can only be accessed by removing the fuel rail, intake manifold, intake pipe, upper coolant hose, Power steering line and a bunch of other stuff.
So far all things tried have had no permanent effect and some were nearly disastrous.
A very expert forum helper tried but did not have intimate knowledge of the components involved.
The same goes for the PCV system.
I have been trying to get these things fixed as best I can for nearly a year, but I'm only moderately able to diagnose and too poor, old and infirm.
All help will be greatly appreciated.
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dlundblad
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Re: 2002, V70, 2.4t and the dirty rotten throttle body

Post by dlundblad »

FYI, I was able to remove the throttle body by ONLY removing the air box and ducting and electric fan. Very simple job really.. Just 4 bolts and you can just about stick your head down there to see what's going on.

The PCV system on the other hand is another story. I can't remember if that stuff can be accessed with the above method or not, but it'd be just as easy to remove it all. The PS pump and line can be just unbolted to be moved out of the way. The lines don't need disconnected. I replaced the candied line when I did the PCV system and removing the lower radiator hose made the job so much easier. I just replaced it at that time.
Hers: Charcoal 2002 S60 2.4t 187k
equiprx
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Joined: Fri Jan 06, 2017 5:02 pm
Year and Model: 2002 v70, 24t
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Re: 2002, V70, 2.4t and the dirty rotten throttle body

Post by equiprx »

You should make a you tube video with your head down there. LOL
What's you opinion on disconnecting the battery?
I'll give it another look.
Thanks
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dlundblad
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Re: 2002, V70, 2.4t and the dirty rotten throttle body

Post by dlundblad »

equiprx wrote: Sat Aug 11, 2018 1:55 pm You should make a you tube video with your head down there. LOL
What's you opinion on disconnecting the battery?
I'll give it another look.
Thanks
It'd be glorious for sure.

The battery should be disconnected whenever electronic anything is being messed with.
Hers: Charcoal 2002 S60 2.4t 187k
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prwood
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Re: 2002, V70, 2.4t and the dirty rotten throttle body

Post by prwood »

Here are my thoughts as someone who has a 2001 V70 2.4T and has replaced both the throttle body and pcv system:

1. I'm not sure Sea-Foam will help with either the ETM or PCV issues. The ETM is likely a more permanent hardware issue, and if you have symptoms of a clogged PCV system, I doubt that Sea-Foam would clean up enough to make a difference.
2. That being said, if I was going to try getting Sea-Foam into the air intake while making sure that it didn't foul up any sensors on the way, it seems to me that you could pop off the IAT sensor from the intercooler-to-throttle hose and spray sea-foam in that way. There are no sensors between there and the throttle itself:
Screen Shot 2018-08-14 at 11.29.33 AM.png
Screen Shot 2018-08-14 at 11.29.33 AM.png (66.18 KiB) Viewed 1223 times
I think you could almost manage to do this without removing any other components.

3. When I got throttle related codes, I ended up needing to replace my ETM. I had it rebuilt by XeMODeX, and the rebuilt unit has been working great. In order to replace it, I had to move the power steering hard line, which allowed me to remove the fan shroud, and then access to the intercooler hose and throttle was pretty easy after that.

4. I will agree that both of these jobs are physically demanding. I'm two months shy of 40 and in average health, and it still wasn't easy for me. Ultimately, however, PCV and Throttle issues are likely not going to be cured by Sea Foam, so someone is going to have to do the job at some point.
Cars I've owned:
- 2015 to current: 2001 Volvo V70 2.4T; 2004 Honda Odyssey
- 2007 to 2015: 2002 Subaru Legacy L Wagon
- 2003 to 2016: 2001 Toyota Corolla LE
- 1999 to 2003: 1994 Toyota Camry LE
equiprx
Posts: 33
Joined: Fri Jan 06, 2017 5:02 pm
Year and Model: 2002 v70, 24t
Location: SF Bay Area

Re: 2002, V70, 2.4t and the dirty rotten throttle body

Post by equiprx »

Thanks for the info.
So I'm guessing the motor will run if that sensor isn't in the air-stream?
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prwood
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Re: 2002, V70, 2.4t and the dirty rotten throttle body

Post by prwood »

equiprx wrote: Tue Aug 14, 2018 4:06 pm Thanks for the info.
So I'm guessing the motor will run if that sensor isn't in the air-stream?
My guess would be yes, but that’s just a guess... I haven’t tried this. ;-)
Cars I've owned:
- 2015 to current: 2001 Volvo V70 2.4T; 2004 Honda Odyssey
- 2007 to 2015: 2002 Subaru Legacy L Wagon
- 2003 to 2016: 2001 Toyota Corolla LE
- 1999 to 2003: 1994 Toyota Camry LE
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abscate
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Re: 2002, V70, 2.4t and the dirty rotten throttle body

Post by abscate »

It will but could also set a code if the temperature is implausible.
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cn90
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Re: 2002, V70, 2.4t and the dirty rotten throttle body

Post by cn90 »

Cleaning the Throttle Body in the 2.5T engine is, in fact, VERY SIMPLE.
No need to remove Intake Manifold etc. etc.
All you need is to read this DIY I wrote a while back.
And it is FREE (other than the cost of the Brake Cleaner etc.).

DIY: 2005 XC90 2.5T Throttle Body Cleaning
viewtopic.php?t=78629
2004 V70 2.5T 100K+
2005 XC90 2.5T 110K+
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prwood
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Re: 2002, V70, 2.4t and the dirty rotten throttle body

Post by prwood »

cn90 wrote: Wed Aug 15, 2018 7:19 pm Cleaning the Throttle Body in the 2.5T engine is, in fact, VERY SIMPLE.
No need to remove Intake Manifold etc. etc.
All you need is to read this DIY I wrote a while back.
And it is FREE (other than the cost of the Brake Cleaner etc.).

DIY: 2005 XC90 2.5T Throttle Body Cleaning
viewtopic.php?t=78629
That's the newer-style, more compact throttle body. In '01-'02 the 2.4T had a larger throttle body that is likely more difficult to maneuver. You can see one here attached to the intake manifold of my '01 V70 2.4T:
IMG_1190.JPG
I had to remove the fan shroud to get mine out.
Cars I've owned:
- 2015 to current: 2001 Volvo V70 2.4T; 2004 Honda Odyssey
- 2007 to 2015: 2002 Subaru Legacy L Wagon
- 2003 to 2016: 2001 Toyota Corolla LE
- 1999 to 2003: 1994 Toyota Camry LE
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