SECONDARY AIR
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From: Calgary, Alberta CANADA
SECONDARY AIR
Hey everyone. My 95’ 993 C2 secondary air pump failed and the local Porsche dealer disabled it. They said I could drive it this way until I was ready to bring it in for service.
1) is driving it like this potentially problematic?
2) if not how long can it be run this way without it causing further issues?
TIA!
1) is driving it like this potentially problematic?
2) if not how long can it be run this way without it causing further issues?
TIA!
RL Community Team
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From: Dallas, TX
Hi Mathew,
1: Not problematic, the air pump is used to inject a little air into the exhaust manifold so any excess unburnt fuel at startup is consumed and does not contribute to emissions. It only runs literally for a few moments at start-up and then turns off. It is of no operational consequence and does not impact the ongoing performance or durability of any component in the car.
2. The only issue is in some states you will not pass the emissions test and the annoying light on your dash will remain on. The pigtail wires leading to the pump are a known issue in our cars from heat-related wire insulation failure. The wires can be easily repaired or replaced at a substantially lower cost than $1700 for a new pump. Dealers do not tend to fix components, just replace them a good reason alone to develop a relationship with an independent shop who will work with you to fix rather than replace lowering your cost. The pump in my car has over 100K miles of use involving thousands of start-ups and the pump is still good to go.
If the fuse to the pump is blown or the pump doesn't run when manually switched on using the run function in the shops OBDC Reader software, It is most likely the pump or its pigtail wires. Ask your dealer what OBDC codes it is throwing and post them here for a discussion on how others have addressed the issue. Or better yet consider getting a good reader that will read all the codes your car produces.
Here is one posting related to the subject, I believe there is a good DIY posting on how to fix the wires on this site.:
https://rennlist.com/forums/993-foru...g-harness.html
Andy
1: Not problematic, the air pump is used to inject a little air into the exhaust manifold so any excess unburnt fuel at startup is consumed and does not contribute to emissions. It only runs literally for a few moments at start-up and then turns off. It is of no operational consequence and does not impact the ongoing performance or durability of any component in the car.
2. The only issue is in some states you will not pass the emissions test and the annoying light on your dash will remain on. The pigtail wires leading to the pump are a known issue in our cars from heat-related wire insulation failure. The wires can be easily repaired or replaced at a substantially lower cost than $1700 for a new pump. Dealers do not tend to fix components, just replace them a good reason alone to develop a relationship with an independent shop who will work with you to fix rather than replace lowering your cost. The pump in my car has over 100K miles of use involving thousands of start-ups and the pump is still good to go.
If the fuse to the pump is blown or the pump doesn't run when manually switched on using the run function in the shops OBDC Reader software, It is most likely the pump or its pigtail wires. Ask your dealer what OBDC codes it is throwing and post them here for a discussion on how others have addressed the issue. Or better yet consider getting a good reader that will read all the codes your car produces.
Here is one posting related to the subject, I believe there is a good DIY posting on how to fix the wires on this site.:
https://rennlist.com/forums/993-foru...g-harness.html
Andy
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From: Ellicott City, MD
RL Community Team
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From: Dallas, TX
I feel this is not a good idea as the system doesn't influence performance and the day will come when you may want to sell the car where tampering with the system is illegal and will most likely be a problem for the buyer if they live in a state where emission inspections are required. Also over time not pushing air regularly through the system from the pump may result in carbon clogged air injectors an even bigger issue when selling the car, conceivably lowering its value a material amount because of its inability to pass the readiness state for emission testing.
Andy
Andy
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From: Baltimore, MD
What? You did answer, and it was incorrect. It's been known for years that '95 993s don't experience CELs because of clogged SAIs.
Just a thought, but maybe, just maybe, shotgunning every answer isn't the best approach to helping people, especially for the new folks here who are relying on more senior members for accurate assistance.
Just a thought, but maybe, just maybe, shotgunning every answer isn't the best approach to helping people, especially for the new folks here who are relying on more senior members for accurate assistance.
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From: Chicago
The only money worth spending on your SAI system is the $30 for the port block off plugs set. Only good comes of this, unless somehow some commie state would give you some visual inspection fail. Not sure if that is an actual risk or just paranoia. Link:
https://patrickmotorsports.com/produ...13-200-aib-pms
Edit: p.s. I'm only talking about '95s since I assume a '96+ will throw codes if you remove the SAI.
https://patrickmotorsports.com/produ...13-200-aib-pms
Edit: p.s. I'm only talking about '95s since I assume a '96+ will throw codes if you remove the SAI.
Last edited by TheOtherEric; Sep 21, 2019 at 12:06 AM.
Thread Starter
Rennlist Member
Joined: Aug 2017
Posts: 204
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From: Calgary, Alberta CANADA
The only money worth spending on your SAI system is the $30 for the port block off plugs set. Only good comes of this, unless somehow some commie state would give you some visual inspection fail. Not sure if that is an actual risk or just paranoia. Link:
https://patrickmotorsports.com/produ...13-200-aib-pms
https://patrickmotorsports.com/produ...13-200-aib-pms
Seared
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From: Ellicott City, MD
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What? You did answer, and it was incorrect. It's been known for years that '95 993s don't experience CELs because of clogged SAIs.
Just a thought, but maybe, just maybe, shotgunning every answer isn't the best approach to helping people, especially for the new folks here who are relying on more senior members for accurate assistance.
Just a thought, but maybe, just maybe, shotgunning every answer isn't the best approach to helping people, especially for the new folks here who are relying on more senior members for accurate assistance.
