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Throttle issue 02' v70 2.4 n/a

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R
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Itschetmanly31
Posts: 5
Joined: 6 September 2025
Year and Model: 2002 v70
Location: West Virginia

Throttle issue 02' v70 2.4 n/a

Post by Itschetmanly31 »

👋 hello, my car is having problems with throttle/ idle RPM will shoot up to 1500-2000 on startup and fluctuate when warm. After warm up RPM will gradually increase to 2500 and then drop to 1500 and again slowley go back to 2500 over and over again untill it stalls then shuts down. Additional symptoms are no response from accelerator pedal and then sudden response when pressing pedal. Stalling then die when going through gear changes (automatic trans).

I did install a new upgraded magnetic TPS on the ETM with no success, absolutely no change in symptoms. All other sensors have been checked with scanner (not VIDA) and are working consistently and all fuses are good. The car WAS throwing codes relative to the accelerator pedal soo I removed it and found a scratch on the sensor face (pedal side not pluged side). So my question, does anyone have experience with this? And would a scratch on the pedal potentiometer casue the problems mentioned above? Below is a picture of the petal sensor.
Screenshot_20250906_140813_Gallery~2.jpg
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jonesg
Posts: 3501
Joined: 16 January 2008
Year and Model: 2004 V70
Location: Northern maine.
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Post by jonesg »

those are symptoms of a dirty throttle body, have you tried cleaning it ?
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Itschetmanly31
Posts: 5
Joined: 6 September 2025
Year and Model: 2002 v70
Location: West Virginia

Post by Itschetmanly31 »

Yes I did a thorough clean on the TB although it wasn't very dirty to begin with. In addition, replaced the TB gasket.
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jonesg
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Post by jonesg »

Try a sweep test in vida.
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Itschetmanly31
Posts: 5
Joined: 6 September 2025
Year and Model: 2002 v70
Location: West Virginia

Post by Itschetmanly31 »

I'm really not tech savvy. I'm thinking about looking up a local guy with access to VIDA software to perform a check. But thanks for the video
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jonesg
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Post by jonesg »

Itschetmanly31 wrote: ↑07 Sep 2025, 07:03 I'm really not tech savvy. I'm thinking about looking up a local guy with access to VIDA software to perform a check. But thanks for the video
good idea, I'm not a tech type either.
I know it uses 2 methods to generate throttle signal, digital and analog, they have to be a close match or it will go into limp mode.
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br0dy519
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Joined: 17 December 2019
Year and Model: 2004 XC70
Location: Windsor, ON
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Post by br0dy519 »

02 has the ETM? I thought that was only 01. Rest are ETB
04s60 2.4
04xc70 2.5t
prwood wrote:I wish I had a permanent car repair area that was covered, had a level surface, lighting and fans, a workbench, and tool cabinets. You know,like a garage. Much of my time during the job is spent hauling things up and down the stairs to the basement or in and out of the storage shed, or running back downstairs when I realize I need something else,or taking a break from standing out in the sun,or using flashlights or work lamps when it gets dark.
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Itschetmanly31
Posts: 5
Joined: 6 September 2025
Year and Model: 2002 v70
Location: West Virginia

Post by Itschetmanly31 »

Not sure if its ETB or ETM its the larger clunky TB with the yellow sticker.

Update: after taking for a test drive I think im dealing with a fuel pump issue it gives many symptoms of failing pump or regulator unit. The car has never engaged limp mode witch is a big indicator of a failed TB. I can still drive the car and it responds to throttle input. I will test pressure and post results later
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br0dy519
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Year and Model: 2004 XC70
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Post by br0dy519 »

Gotcha. I would make sure you don't have any vacuum leaks as well. Those have always caused fuel-like symptoms for me.
04s60 2.4
04xc70 2.5t
prwood wrote:I wish I had a permanent car repair area that was covered, had a level surface, lighting and fans, a workbench, and tool cabinets. You know,like a garage. Much of my time during the job is spent hauling things up and down the stairs to the basement or in and out of the storage shed, or running back downstairs when I realize I need something else,or taking a break from standing out in the sun,or using flashlights or work lamps when it gets dark.
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Itschetmanly31
Posts: 5
Joined: 6 September 2025
Year and Model: 2002 v70
Location: West Virginia

Post by Itschetmanly31 »

Found a vacume leak and she's back to normal. Initially I found a vacume leak, fixed and had no change in symptoms. I did the fuel pressure test and that's when I found the OTHER broken vacume line lmao. SMH it was a simple fix all along, the car adjusted back to normal idle after just a few seconds
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