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Mechanical issue

Tiny
MICHAEL SMYTH
  • MEMBER
  • 2005 MITSUBISHI ECLIPSE
  • 3.0L
  • V6
  • 2WD
  • AUTOMATIC
  • 163,000 MILES
Throwing codr p0421 and p0321 no check light. Car engine idles fine about 700, but has no power like being in limp mode. It gets hot engine bay not temp gage. Scan said 180 is tgat to hot, what do I do
Friday, September 9th, 2016 AT 8:04 AM

6 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
There is no code 321 421 is catalytic converter threshold effiecentcy problem on bank one . check fuel pressure with a gauge may be low causing this auto parts rent gauge but yo may need an adapter.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Friday, September 9th, 2016 AT 9:35 AM
Tiny
MICHAEL SMYTH
  • MEMBER
  • 5 POSTS
Scan showed on recording
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Friday, September 9th, 2016 AT 9:44 AM
Tiny
MICHAEL SMYTH
  • MEMBER
  • 5 POSTS
On my skin to when I scan the OBD2 it showed like the Mal status is all capital letters 26-7 Mama p.M. At SG is 9.7 coolant was 178 I 80 temperature with 90 ignition Advance was 14 the and says fuel system 1 closed fuel system to close at least I think that's what he said this clsd St ftrm11 one percentage is -71.9 and the same thing ftrm 12% 1 is -84.4 and they dropped it the one with the 12 drops of -46.9 + 11 - -78.1 as I'm flipping through their frame s
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Friday, September 9th, 2016 AT 9:49 AM
Tiny
MICHAEL SMYTH
  • MEMBER
  • 5 POSTS
I'm sorry talk to text messed that up bad. DTCs codes p0431 and p0421, about warm up ban efficiency bank 1 and 2 below threshold
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Friday, September 9th, 2016 AT 10:05 AM
Tiny
MICHAEL SMYTH
  • MEMBER
  • 5 POSTS
Thanks for your help in sorry for last couple post because I couldn't even understand it. Would fuel pressure cause it no power, but idle great, get hot, not through check engine light
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Friday, September 9th, 2016 AT 10:19 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It could, it would make the engine run lean that is why isaid to check it. It cold be an O2 sensor or partially plugged converter as well but seeing as it's on both banks you have said about other things happening i'd start there first especially if it's a turbo it' should be 39 psi at idle and should not drop after being revved several times.
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Friday, September 9th, 2016 AT 11:52 AM

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