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Planet-9

Chronic hesitation around 1200-1300 rpm

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Original source
7 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHChronic hesitation around 1200-1300 rpm

Leading reported evidence

Clean mass air flow sensor

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

I've cleaned the MAF, changed the AOS, changed the plugs, run Techron through the fuel system.

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm
Frequently discussed work

Check intake/vacuum leaks

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

Does anyone have any ideas of what to check or where to check for a vacuum leak?

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm
Read full discussion summary

Leading evidence: 'Clean mass air flow sensor' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check intake/vacuum leaks' (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 · 1 partial discussions

Compare 4 other evidence results

Install lwf

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

I've been suffering with this for several years but now that I've installed a LWF, it's even worse since there is less momentum to get through it.

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm

Replace air oil separator

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

I've cleaned the MAF, changed the AOS, changed the plugs, run Techron through the fuel system.

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm

Replace aos or

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

I called them up before I changed AOS or cleaned MAF and they said it was probably MAF or vacuum leak.

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm

Replace plugs

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

I've cleaned the MAF, changed the AOS, changed the plugs, run Techron through the fuel system.

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm
Frequently discussed actions (10)

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

Check intake/vacuum leaks

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

Does anyone have any ideas of what to check or where to check for a vacuum leak?

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm

Check vacuum leak and was really hoping

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

I don't know how/where to check for a vacuum leak and was really hoping changing the AOS would fix it.

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm

Check vacuum leaks and fix them

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

Here’s How To Check for Vacuum Leaks and Fix Them

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm

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 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

I've cleaned the MAF, changed the AOS, changed the plugs, run Techron through the fuel system.

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm

Install lwf

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

I've been suffering with this for several years but now that I've installed a LWF, it's even worse since there is less momentum to get through it.

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm

Replace air oil separator

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

I've cleaned the MAF, changed the AOS, changed the plugs, run Techron through the fuel system.

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm

Replace aos or

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

I called them up before I changed AOS or cleaned MAF and they said it was probably MAF or vacuum leak.

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm

Replace aos would fix it

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

I don't know how/where to check for a vacuum leak and was really hoping changing the AOS would fix it.

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm

Replace plugs

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

I've cleaned the MAF, changed the AOS, changed the plugs, run Techron through the fuel system.

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm

Run race parts

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

So this may be a case of "that's the price of running race parts on your road car"

Original post Read captured discussion
Chronic hesitation around 1200-1300 rpm
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.

  • Planet-9: 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: 20261026T152433Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

I've been suffering with this for several years but now that I've installed a LWF, it's even worse since there is less momentum to get through it. It throws no codes (I have a Durametric and nothing shows on a scan). I've cleaned the MAF, changed the AOS, changed the plugs, run Techron through the fuel system. Nothing helps. I do have the Softronic Race Plenum/flash. I called them up before I changed AOS or cleaned MAF and they said it was probably MAF or vacuum leak. I don't know how/where to check for a vacuum leak and was really hoping changing the AOS would fix it. Does anyone have any ideas of what to check or where to check for a vacuum leak?

POST 3Original post

I'm not going to re-type this article, but it's what I'd do for my car: Here’s How To Check for Vacuum Leaks and Fix Them Also, the Race plenum eliminates one of the tuning flaps which may operate in that RPM range. So this may be a case of "that's the price of running race parts on your road car"

POST 4Original post

That is certainly possible, but I did call Softronic and he said that this isn't a problem they have. I also asked if maybe there was a bug in the tune and maybe we should redo the tune and he said he is sure it isn't the tune.

POST 6Original post

Seems better. I was missing a vacuum cap coming from the AOS. The port would have fed to the plenum but I have SRP 'which does not have that port on the plenum so you have to cap it off. Guess the cap didn't fit well and came off (a long time ago as it's been doing this for years).

POST 7Original post

Not sure what year you have (DFI or not), but my ‘10 CS had a similar hesitation; I removed the intakes and did a walnut blast on the valves (they were very caked up). Hesitation is gone now. It was not a fun job, but the result was rewarding.

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