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Start Up and Idle Problem, p1123 & p1125

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7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHStart Up and Idle Problem, p1123 & p1125

Leading reported evidence

Check vacuum leaks, esp

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

Check for vacuum leaks, esp.

Start Up and Idle Problem, p1123 & p1125
Read full discussion summary

Leading evidence: 'Check vacuum leaks, esp' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check vacuum leaks, esp' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 7 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Clean idle control valve

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

Remove and clean the idle control valve with carb cleaner.

Start Up and Idle Problem, p1123 & p1125

Clean mass air flow sensor

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

I was able to resolve it by cleaning the MAF with a circuit board cleaner as suggested by a posting here.

Start Up and Idle Problem, p1123 & p1125

Run with the same issues

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

I tried the cleaning and the CEL came back on the next running with the same issues.

Start Up and Idle Problem, p1123 & p1125
Frequently discussed actions (4)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check vacuum leaks, esp

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

Check for vacuum leaks, esp.

Start Up and Idle Problem, p1123 & p1125

Clean idle control valve

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

Remove and clean the idle control valve with carb cleaner.

Start Up and Idle Problem, p1123 & p1125

Clean mass air flow sensor

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

I was able to resolve it by cleaning the MAF with a circuit board cleaner as suggested by a posting here.

Start Up and Idle Problem, p1123 & p1125

Run with the same issues

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

I tried the cleaning and the CEL came back on the next running with the same issues.

Start Up and Idle Problem, p1123 & p1125
Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Rennlist: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

2 acknowledgements have no verified action link; they do not establish a repair result.

Outcome without a verified action link

I tried the cleaning and the CEL came back on the next running with the same issues.

No unique explicit quoted action; no causal link assigned

Generation: 20261027T033922Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi All, I've been digging around for an answer to my idle & CEL issue and have found several topics, but none match exactly what I'm seeing. The CEL came on about 6mos ago with p1123 and p1125. I was able to resolve it by cleaning the MAF with a circuit board cleaner as suggested by a posting here. I did not notice anything wrong with idle or acceleration at that time. It's now come on again. I've noticed difficulty at start up. The throttle response is poor right after start up. I have to play the gas just to get the RPM's up. In addition, once warm, if I step on the gas hard the car bogs down. If I gently run up the speed there is no problem with acceleration, but I can't punch it. I tried the cleaning and the CEL came back on the next running with the same issues. I found a posting that suggested unplugging the MAF to see if that was the problem. I can now hit the gas after the engine is warm and the car really moves again, but it didn't solve the throttle response at start up. I would say it's almost worse. Does any of this help point to the MAF failing, or something else? Thanks,

POST 2Original post

I thought I had the same problem with pretty much the same symptoms. The dealer also diagnosed it the same way. Took the car in and found that one of the hoses had a hole in it. Replaced it and everything is fine.

POST 4 / ORIGINAL POSTEROriginal post

Sorry for the delayed response. The car is a 99 non egas C2 Coupe. I have a code reader, it's the basic model. The codes are p1123 and p1125. I've kept the MAF unplugged since this post and the throttle response is SOOOO much better. Just ordered one from Paragon Products. Way better price than the dealer. Even beat Sunset.

POST 5Original post

Check for vacuum leaks, esp. the oil/air separator bellows located on the driver's side bank. Very prone to failure and easy to replace.

POST 6 / ORIGINAL POSTEROriginal post

Thanks Viper501. I'll check it after work. Chris

POST 7Original post

Remove and clean the idle control valve with carb cleaner. Make sure the window pivots freely.

This is a source reference. Confirm exact model applicability in the original material.