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Serendipity87
Samba Member
Joined: January 05, 2019
Posts: 11
Location: Washington
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 Posted: Mon Jul 28, 2025 10:15 am Post subject: 87 Syncro - Running Rich |
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and one more issue to deal with...
My van has a GenV Jetta Engine 2.0L recently "went limp", underpowered, out of nowhere seemingly.
I found I had two codes:
P2138: throttle/pedal position sensor
P0172: running rich
Fixed the pedal position sensor and it has not gone limp again. Seems to be running fine.
But the running rich code persists.
Changed the spark plugs, wires look ok. Muffler/oxygen sensor were pretty recently replaced. I don't have any dash lights currently.
What else do you suggest I check?
1987 Syncro Camper Van/Country Homes Camper Poptop
Last edited by Serendipity87 on Mon Jul 28, 2025 4:10 pm; edited 2 times in total |
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4Gears4Tires
Samba Member
Joined: October 08, 2018
Posts: 4385
Location: MD
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| Posted: Mon Jul 28, 2025 10:25 am Post subject: Re: 87 Syncro - Running Rich |
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What motor are you running?
_________________
'87 Syncro Ferric Oxyhydroxide Superleggera Edition
'85 Westy Sciuridae Domus Edition |
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dhaavers
Samba Member
Joined: March 19, 2010
Posts: 8503
Location: NE MN (tinyurl.com/dhaaverslocation)
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| Posted: Mon Jul 28, 2025 11:46 am Post subject: Re: 87 Syncro - Running Rich |
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From his other thread:
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| GenV 2.1L Jetta Engine |
Yeah, good to know specifics.
- Dave
_________________
86 White Wolfsburg Westy Weekender
"The WonderVan"
<EDITED TO PROTECT INNOCENT PIXELS> |
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Serendipity87
Samba Member
Joined: January 05, 2019
Posts: 11
Location: Washington
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| Posted: Mon Jul 28, 2025 1:17 pm Post subject: Re: 87 Syncro - Running Rich |
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I edited original post to include the Engine - 2.0L GenV Jetta.
Last edited by Serendipity87 on Mon Jul 28, 2025 4:10 pm; edited 1 time in total |
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Phishman068
Samba Member
Joined: February 19, 2007
Posts: 2018
Location: Pittsburgh PA (ish)
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Serendipity87
Samba Member
Joined: January 05, 2019
Posts: 11
Location: Washington
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| Posted: Mon Jul 28, 2025 4:13 pm Post subject: Re: 87 Syncro - Running Rich |
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| Phishman068 wrote: |
Do you mean a Foreign Auto Supply Gen 5 2.0 Liter conversion?
That's an engine swap, and will have very specific issues that would likely best be answered by Foreign Auto Supply (The company making and supporting that engine, out of Maine). |
Yes you're correct, 2.0 (original engine was 2.1). It is an engine swap. I had reached out to my mechanic here in Seattle who did the conversion, but hadn't heard back yet today...hadn't thought to reach out to FAS, thanks. Good idea. |
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hardway
Samba Member
Joined: January 03, 2012
Posts: 499
Location: Fidalgo Island
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| Posted: Tue Jul 29, 2025 5:58 pm Post subject: Re: 87 Syncro - Running Rich |
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The fault codes you have listed are generic OBD II faults. Your engine is a VAG unit. The ECU actually thinks in VAG specific codes. The OBD II faults are mandated as an overlay by federal law on this side of the pond.
The VAG specific fault code tend to be more specific than the generic fault codes. It would be useful to have access to the VAG fault codes and definitions.
But I would be looking at the throttle control system. Is it a full drive by wire system or an earlier hybrid system? Probably the former. Where is the throttle pedal sensor? |
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