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Porsche 996 Turbo S. boost issues. Help or ideas needed

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YOUR RESEARCHPorsche 996 Turbo S. boost issues. Help or ideas needed

Leading reported evidence

Replace throttle body, and since the

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Performed · outcome unconfirmed

That said, for me even stepping from a 944Turbo I find it scarily fast, but now you mention it when I used the boost function it was before I changed the throttle body, and since the change the car does seem quicker smoother and more economical.

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Porsche 996 Turbo S. boost issues. Help or ideas needed
Frequently discussed work

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Suggestion

Start by getting a diagnostic check done, to see if there are any faults recorded.

Original post Read captured discussion
Porsche 996 Turbo S. boost issues. Help or ideas needed
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Leading evidence: 'Replace throttle body, and since the' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check done' (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.

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Use boost function it was

Performed · outcome unconfirmed

No successful repair reported for this finding.

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Reported fixes
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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

That said, for me even stepping from a 944Turbo I find it scarily fast, but now you mention it when I used the boost function it was before I changed the throttle body, and since the change the car does seem quicker smoother and more economical.

Original post Read captured discussion
Porsche 996 Turbo S. boost issues. Help or ideas needed

Check done

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No successful repair reported for this finding.

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Reported fixes
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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

Start by getting a diagnostic check done, to see if there are any faults recorded.

Original post Read captured discussion
Porsche 996 Turbo S. boost issues. Help or ideas needed

Check emgine light

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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.

Discussions that contain suggestions
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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

If there was a problem with the lambda then i would have a check emgine light on.

Original post Read captured discussion
Porsche 996 Turbo S. boost issues. Help or ideas needed

Replace car does seem quicker smoother and more economical

Suggestion or failed attempt

No successful repair reported for this finding.

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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

That said, for me even stepping from a 944Turbo I find it scarily fast, but now you mention it when I used the boost function it was before I changed the throttle body, and since the change the car does seem quicker smoother and more economical.

Original post Read captured discussion
Porsche 996 Turbo S. boost issues. Help or ideas needed
Frequently discussed actions (6)

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

Check done

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Read evidence and context
Discussions that contain suggestions
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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

Start by getting a diagnostic check done, to see if there are any faults recorded.

Original post Read captured discussion
Porsche 996 Turbo S. boost issues. Help or ideas needed

Check emgine light

No successful repair reported for this finding.

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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

If there was a problem with the lambda then i would have a check emgine light on.

Original post Read captured discussion
Porsche 996 Turbo S. boost issues. Help or ideas needed

Replace car does seem quicker smoother and more economical

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
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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

That said, for me even stepping from a 944Turbo I find it scarily fast, but now you mention it when I used the boost function it was before I changed the throttle body, and since the change the car does seem quicker smoother and more economical.

Original post Read captured discussion
Porsche 996 Turbo S. boost issues. Help or ideas needed

Replace throttle body, and since the

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

That said, for me even stepping from a 944Turbo I find it scarily fast, but now you mention it when I used the boost function it was before I changed the throttle body, and since the change the car does seem quicker smoother and more economical.

Original post Read captured discussion
Porsche 996 Turbo S. boost issues. Help or ideas needed

Test today, just got a flash of 0.8

No successful repair reported for this finding.

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Reported fixes
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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

Well we did the boost test today, just got a flash of 0.8 before hooking 3rd and definitely makes at least 0.7 bar in fourth before stamping on the brakes because the horizon is about to dissapear out of the back window, with revs left

Original post Read captured discussion
Porsche 996 Turbo S. boost issues. Help or ideas needed

Use boost function it was

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

That said, for me even stepping from a 944Turbo I find it scarily fast, but now you mention it when I used the boost function it was before I changed the throttle body, and since the change the car does seem quicker smoother and more economical.

Original post Read captured discussion
Porsche 996 Turbo S. boost issues. Help or ideas needed
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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.

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

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Generation: 20261027T201111Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Have bought an immaculate 2005 996 TS with only 20.000 miles. Car looks smells and feels new. Problem is that it doesnt pass 0,7 bar of boost. Car is 100% stock apart from a Ruf exhaust. Nothing else Any ideas as to what could be causing the low boost issue ?

POST 3Original post

I have a std 420 hp 996tt with tubi exhaust and I have never seen the boost gauge go past 0.5 so 0.7 on the S seems reasonable. Does it feel down on power? I could easily lose my license in 3rd gear and fourth was 123 at 0.5 at Bedford and bloody quick at that.

POST 4 / ORIGINAL POSTEROriginal post

I ve driven doxens of 996 TTs stock, turbo S and modded. Car seems slowish compared to other stock ones i drove in the past. If there was a problem with the lambda then i would have a check emgine light on. Any others maybe ?

POST 5Original post

Whilst that may be true of a lambda sensor, there are many other sensors that DO NOT trigger the CEL (on a UK car), but will store a fault in the fault register. These sensors include MAF, Air intake temperature, throttle potentiometer, and many others. Start by getting a diagnostic check done, to see if there are any faults recorded.

POST 6Original post

I also have a standard car with tubi, and seeing 0.6-0.7 is no problem (and quite normal ), so don't know why you're only getting 0.5. Only problem I have now is that after picking it up from a service yesterday, I saw as much as 1.4! So it went straight back for a check. An S should be seeing 0.8-0.9 max.

POST 7Original post

Mine may well reach 0.7 but I seldom have obc in "boost" function. I will have to try it out in second gear so that I have more time to study it. That said, for me even stepping from a 944Turbo I find it scarily fast, but now you mention it when I used the boost function it was before I changed the throttle body, and since the change the car does seem quicker smoother and more economical. I got 24.5 mpg on a round trip to Wales with mixed driving, when we had R19 weekend of the year. I will give it another go now. Well not right now but next time I drive it.

POST 8Original post

Well we did the boost test today, just got a flash of 0.8 before hooking 3rd and definitely makes at least 0.7 bar in fourth before stamping on the brakes because the horizon is about to dissapear out of the back window, with revs left

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