05-27-2010, 04:22 PM
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#1
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Registered User
Join Date: Jun 2009
Location: Los Angeles, CA
Posts: 178
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just installed the pre cat o2 sensors. To no avail. The car does not want to rev beyond 3,000 RPM, and I think it's running lean. Next part from NAPA is going to be the MAF. Any other suggestions?
http://picasaweb.google.com/jondirty/Porsche#5476108638238912290
__________________
Jonny Wonder
1999 Porsche Boxster 5 Spd
Stock, with GAHH A5 Glass top.
Previous Toys:
2005 RX-8, RIP
1989 GTA, 5 Speed, Procharger Supercharger and 2 Core Intercooler, 1 3/4" headers, 3" Flomaster Exhaust, cat-delete, digital ignition, bigger fuel injectors
Last edited by Oaktown 986; 05-27-2010 at 04:23 PM.
Reason: pic
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05-27-2010, 04:46 PM
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#2
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Registered User
Join Date: Aug 2007
Location: Virginia
Posts: 244
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Quote:
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Originally Posted by Oaktown 986
Any other suggestions?
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A few ideas...
Fuel pump? Fuel pressure regulator (if the box has one... Not sure)? Fuel filter clogged? Electrical issue resulting in loss of spark or signal to injectors of one bank?
__________________
-- John
'00 Boxster S
'86 911 Carrera Coupe (Sold)
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05-27-2010, 04:51 PM
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#3
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Registered User
Join Date: Jun 2009
Location: Los Angeles, CA
Posts: 178
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Quote:
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Originally Posted by Lucky
A few ideas...
Fuel pump? Fuel pressure regulator (if the box has one... Not sure)? Fuel filter clogged? Electrical issue resulting in loss of spark or signal to injectors of one bank?
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It runs and drives, just very poorly (considering it was running like a top a couple weeks back) and can't make it past 3k. I manually pulled the throttle cable, thinking that maybe the throttle body blade is stuck or facing resistance, but that didn't help. It's getting fuel and spark, it sounds quite normal at idle. it also has idling problems right after you gas it, but then it quickly returns to a normal idle.
New codes:
P1319 Signal implausible cyl 1-6
P1313 emission related signal implausible cyl 1-6
P1314 emission " "
P1318 " "
P0150 O2 Circuit bank 2 sensor 1
P1316 misfire, emission related signal implausible cyl 1-6
P0102 Mass or volume air flow circuit low input (I unplugged the MAF momentarily to see if there was a difference)
The car won't really get past 1500 RPM now...
__________________
Jonny Wonder
1999 Porsche Boxster 5 Spd
Stock, with GAHH A5 Glass top.
Previous Toys:
2005 RX-8, RIP
1989 GTA, 5 Speed, Procharger Supercharger and 2 Core Intercooler, 1 3/4" headers, 3" Flomaster Exhaust, cat-delete, digital ignition, bigger fuel injectors
Last edited by Oaktown 986; 05-27-2010 at 05:07 PM.
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05-27-2010, 05:04 PM
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#4
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Registered User
Join Date: Aug 2007
Location: Virginia
Posts: 244
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Quote:
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Originally Posted by Oaktown 986
It runs and drives, just very poorly (considering it was running like a top a couple weeks back) and can't make it past 3k. I manually pulled the throttle cable, thinking that maybe the throttle body blade is stuck or facing resistance, but that didn't help. It's getting fuel and spark, it sounds quite normal at idle. it also has idling problems right after you gas it, but then it quickly returns to a normal idle.
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A smooth & normal idle would rule out most electrical issues. Could still be the fuel pump/pressure.
__________________
-- John
'00 Boxster S
'86 911 Carrera Coupe (Sold)
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05-27-2010, 05:12 PM
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#5
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Registered User
Join Date: Jun 2009
Location: Los Angeles, CA
Posts: 178
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Quote:
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Originally Posted by Lucky
A smooth & normal idle would rule out most electrical issues. Could still be the fuel pump/pressure.
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when the MAF was disconnected; it ran rich (it smelled of gas and couldn't easily maintain idle). Does that help?
__________________
Jonny Wonder
1999 Porsche Boxster 5 Spd
Stock, with GAHH A5 Glass top.
Previous Toys:
2005 RX-8, RIP
1989 GTA, 5 Speed, Procharger Supercharger and 2 Core Intercooler, 1 3/4" headers, 3" Flomaster Exhaust, cat-delete, digital ignition, bigger fuel injectors
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05-27-2010, 05:34 PM
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#6
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Registered User
Join Date: Aug 2007
Location: Virginia
Posts: 244
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Quote:
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Originally Posted by Oaktown 986
when the MAF was disconnected; it ran rich (it smelled of gas and couldn't easily maintain idle). Does that help?
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When you say it won't rev beyond 3k, is this while driving or just sitting in your driveway in neutral?
__________________
-- John
'00 Boxster S
'86 911 Carrera Coupe (Sold)
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05-27-2010, 05:40 PM
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#7
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Registered User
Join Date: Jun 2009
Location: Los Angeles, CA
Posts: 178
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Quote:
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Originally Posted by Lucky
When you say it won't rev beyond 3k, is this while driving or just sitting in your driveway in neutral?
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driveway in neutral; i drove it a couple days ago, and it wasn't pleasant. now in neutral it's barely getting beyond 1500. ugh.
__________________
Jonny Wonder
1999 Porsche Boxster 5 Spd
Stock, with GAHH A5 Glass top.
Previous Toys:
2005 RX-8, RIP
1989 GTA, 5 Speed, Procharger Supercharger and 2 Core Intercooler, 1 3/4" headers, 3" Flomaster Exhaust, cat-delete, digital ignition, bigger fuel injectors
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