Rennlist

5500 rpm hang

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Original source

5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH5500 rpm hang

Leading reported evidence

Clean maf, fired it up, same issue

Performed · outcome unconfirmed

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 performed work without a confirmed outcome: 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.

Performed · outcome unconfirmed · Original poster
cleaned the maf, fired it up, same issue.
Original post Read captured discussion
5500 rpm hang

Read full discussion summary

Leading evidence: 'Clean maf, fired it up, same issue' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean maf, fired it up, same issue' (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 · 5 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Replace anyhow, around 5k rpm

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 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.

Performed · outcome unconfirmed
IIRC the valve timing is advanced, or is it retarded, changed anyhow, around 5K rpm.
Original post Read captured discussion
5500 rpm hang

Use pst2 diagnostics computer

Suggestion or failed attempt

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 cam timing or cam angle or whatever it is referred to using the PST2 diagnostics computer.
Original post Read captured discussion
5500 rpm hang

Frequently discussed actions (3)

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

Clean maf, fired it up, same issue

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 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.

Performed · outcome unconfirmed · Original poster
cleaned the maf, fired it up, same issue.
Original post Read captured discussion
5500 rpm hang

Replace anyhow, around 5k rpm

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 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.

Performed · outcome unconfirmed
IIRC the valve timing is advanced, or is it retarded, changed anyhow, around 5K rpm.
Original post Read captured discussion
5500 rpm hang

Use pst2 diagnostics computer

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 cam timing or cam angle or whatever it is referred to using the PST2 diagnostics computer.
Original post Read captured discussion
5500 rpm hang

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.

5 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: 20261026T124918Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

hi there. have a 3.6L X51 engine that is new to me. it seems to have a hang at 5500 rpm. if i'm hard on the throttle it'll move right through it, but if I pass through it slowly it'll hang for a sec then continue to rev. I thought it might be a gummy resonance flapper but no dice. no codes. deviation is good. I do have a pst2, so if anyone has any advice, can tell me what to look for, or point me in the right direction I would appreciate it.

POST 2Original post

IIRC the valve timing is advanced, or is it retarded, changed anyhow, around 5K rpm. Check cam timing or cam angle or whatever it is referred to using the PST2 diagnostics computer.

POST 3Original post

I concur with macster

POST 4 / ORIGINAL POSTEROriginal post

yeah, that was what I was thinking - sticky variocam solenoid or something similar. I plotted rpm against maf output, cam position and throttle position and looks like the maf goes wonky at 5500; i'll give it a clean and see how it goes (hopefully that's all it is ...).

POST 5 / ORIGINAL POSTEROriginal post

so, update. cleaned the maf, fired it up, same issue. cams seem to be working ok from the log, maf still flat-spots at 5500 rpm. so, logged throttle position and it looks to do the same thing. so, it looks like the throttle body is jamming or something. anyone heard of such a thing before I tear it apart. on another note, when I activate the valve lift with the pst 2, the car stalls - this what is supposed to happen? cheers, trk.

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