7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHWarm start issues
Leading reported evidence
Clean maf a few times along
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
I have cleaned the MAF a few times along with the throttle body.
Leading evidence: 'Clean maf a few times along' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check faults' (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.
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 performed work without a confirmed outcome
1
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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.
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1
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Suggestion
I notice that you said no faults, what are you using to check for faults ?
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.
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.
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.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T163944Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
As the weather has gotten warmer in Chicago I have started having trouble starting my '99 C4 (76k miles) after the engine is fully warmed up. It isn't the battery or starter. It will just keep turning over like there is an absence of fuel. Eventually it will start after enough tries, but even then the idle is all over the place and it will frequently die. After driving the car a very short distance it is fine.
There are no codes to report. Any ideas? MAF? Fuel filter? I ran Techron though the tank last week and it didn't seem to make a difference.
Thanks in advance for the help!
Jeff
Have you checked the MAF? Cleaned it? Idle is effected by a dirty MAF. Is it a 99 C2? If so, remove and clean the idle control valve. Do you have a scanner?
Thank you very much for the replies.
I have to admit that I'm past due for plugs. They haven't been changed since 30k.
I have cleaned the MAF a few times along with the throttle body. It is a C4 so I don't believe that I have an idle control valve.
I do have the durametric tool if any of those readings would come in handy.
Brad - I don't own a fuel pressure tester but could easily run over to Sears and pick one up. At what point in the fuel system would you suggest testing? What kind of reading am I looking for?
ON A C4 the test point is at the fuel filter in the engine compartment
i would try autozone or similar see if you can rent one its cheaper then buying one and you may never need it again.
I notice that you said no faults, what are you using to check for faults ?
Hook up your scanner and, on a warm engine, take the following readiings at idle, no A/C:
MAF
STFT (both banks)
LTFT ( both banks)
Look at the before cat O2 sensors and make sure they are moving regularly between high and low
2 after cat O2 sensors
Calculated load
Timing
This is a source reference. Confirm exact model applicability in the original material.
