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Fuel injector question - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHFuel injector question - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Use 3.4l rail

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
For the fuel rail I used a 3.4L rail because it bolts up directly and is a return type.
Original post Read captured discussion
Fuel injector question - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Frequently discussed work

Replace 2.5l

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 have a 2.7L 5 chain engine out of a 01 Boxster going in a 1999 replacing a 2.5L.
Original post Read captured discussion
Fuel injector question - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Read full discussion summary

Leading evidence: 'Use 3.4l rail' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace 2.5l' (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.

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1 matching discussions · 3 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Replace 2.5l

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 · Original poster
I have a 2.7L 5 chain engine out of a 01 Boxster going in a 1999 replacing a 2.5L.
Original post Read captured discussion
Fuel injector question - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Run 2.7l as they go

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 · Original poster
I don’t think I can run the 2.7l as they go on a returnless system.
Original post Read captured discussion
Fuel injector question - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Run stick 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 · Original poster
Still running the stick computer with no tune (yet).
Original post Read captured discussion
Fuel injector question - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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.

Replace 2.5l

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 have a 2.7L 5 chain engine out of a 01 Boxster going in a 1999 replacing a 2.5L.
Original post Read captured discussion
Fuel injector question - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Run 2.7l as they go

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 don’t think I can run the 2.7l as they go on a returnless system.
Original post Read captured discussion
Fuel injector question - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Run stick 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 · Original poster
Still running the stick computer with no tune (yet).
Original post Read captured discussion
Fuel injector question - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Use 3.4l rail

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
For the fuel rail I used a 3.4L rail because it bolts up directly and is a return type.
Original post Read captured discussion
Fuel injector question - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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.

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

986Forum: 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: 20261027T042512Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I’ve read through most of the posts on this subject and thought I would get the group’s opinion. I have a 2.7L 5 chain engine out of a 01 Boxster going in a 1999 replacing a 2.5L. I have kept the original intake crossover and used it as the front so that I could retain the cable driven throttle body. The intake is from the 2.7. Rear crossover without butterfly valve is retained in the rear position. For the fuel rail I used a 3.4L rail because it bolts up directly and is a return type. What fuel injector do you recommend? Still running the stick computer with no tune (yet). I don’t think I can run the 2.7l as they go on a returnless system. That leaves me with the 2.5 (no specs found) or the 3.4 injectors? What is your opinion?

POST 2Original post

Can you post pics of the different injectors you are looking at installing? Or even post the Bosch part numbers in question. Maybe someone other than me will reply if you post more details.

POST 3 / ORIGINAL POSTEROriginal post

Sorry double posted. It's what happens when us old guys get around a keyboard. Go here: https://986forum.com/forums/boxster-general-discussions/87510-fuel-injector-help-needed.html

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