Anyone with a 99.5+ Max? Help!
06-26-2003, 05:21 AM
#1
Anyone with a 99.5+ Max? Help!
Here is what I can tell you for certain:
Ram-air intake has been installed for 1 1/2 weeks.
Gas Mileage, which was already not too good (300 miles/tank for 80%city 20% highway driving, occasional racing red light to red light )
is now a bit worse (280 miles/tank, same conditions) I would have figured the ECU would have adjusted to the increased air flow by now. However, I am on my second tank with the intake and mileage is looking to be about the same horrible 280 miles/tank. I DO get hesitation.
Among my recent codes:
right front heated O2 sensor which I cleared (has not appeared again)
Cylinder 6 misfire (cleared, has not appeared again)
14 06 (Undefined)
Knock sensor
All the above codes have been cleared.
Betond that, there is definetly something in my engine bay not shown in any of the Haynes manuals, (or in any of your own pics of your own engine bays, for that matter, including the motorvate.ca write-up) Again, it is a small, tennis ball-sized object connected to a mechanism which moves a lot like the trottle opener under the hood. It's definitely there, and I haven't seen it on any of you guys' photos. It blocks my view of the knock sensor, and all physical access (Unless you have a pipe cleaner and are satisfied with touching something you can't see). I'm loooking for someone with a 99.5+ Max- they may know what I'm talking about.
Ram-air intake has been installed for 1 1/2 weeks.
Gas Mileage, which was already not too good (300 miles/tank for 80%city 20% highway driving, occasional racing red light to red light )
is now a bit worse (280 miles/tank, same conditions) I would have figured the ECU would have adjusted to the increased air flow by now. However, I am on my second tank with the intake and mileage is looking to be about the same horrible 280 miles/tank. I DO get hesitation.
Among my recent codes:
right front heated O2 sensor which I cleared (has not appeared again)
Cylinder 6 misfire (cleared, has not appeared again)
14 06 (Undefined)
Knock sensor
All the above codes have been cleared.
Betond that, there is definetly something in my engine bay not shown in any of the Haynes manuals, (or in any of your own pics of your own engine bays, for that matter, including the motorvate.ca write-up) Again, it is a small, tennis ball-sized object connected to a mechanism which moves a lot like the trottle opener under the hood. It's definitely there, and I haven't seen it on any of you guys' photos. It blocks my view of the knock sensor, and all physical access (Unless you have a pipe cleaner and are satisfied with touching something you can't see). I'm loooking for someone with a 99.5+ Max- they may know what I'm talking about.
06-26-2003, 06:03 AM
#2
Member who somehow became The President of The SE-L Club
iTrader: (19)
Join Date: Jun 2001
Posts: 16,033
That object your looking at is part of the Swich Valves in your intake manifold. The vacuum actuator and linkage sits beside the intake. No other 4th gen has this setup. They operate when the car is cold by closing slightly to create more turbulance inside the intake manifold which is to help stir up and mix the richer air/fuel intake for better burn. We also have more o2 sensors and a different ECU then other 99 models.
It does completely block the KS even from view. I'm sure it's going to be a nightmare getting that sucker changed when and if it ever fails.
It does completely block the KS even from view. I'm sure it's going to be a nightmare getting that sucker changed when and if it ever fails.
06-26-2003, 07:16 AM
#3
Supporting Maxima.org Member
Join Date: Jun 2002
Location: Maryland
Posts: 1,207
Originally posted by njmaxseltd
That object your looking at is part of the Swich Valves in your intake manifold. The vacuum actuator and linkage sits beside the intake. No other 4th gen has this setup. They operate when the car is cold by closing slightly to create more turbulance inside the intake manifold which is to help stir up and mix the richer air/fuel intake for better burn. We also have more o2 sensors and a different ECU then other 99 models.
It does completely block the KS even from view. I'm sure it's going to be a nightmare getting that sucker changed when and if it ever fails.
That object your looking at is part of the Swich Valves in your intake manifold. The vacuum actuator and linkage sits beside the intake. No other 4th gen has this setup. They operate when the car is cold by closing slightly to create more turbulance inside the intake manifold which is to help stir up and mix the richer air/fuel intake for better burn. We also have more o2 sensors and a different ECU then other 99 models.
It does completely block the KS even from view. I'm sure it's going to be a nightmare getting that sucker changed when and if it ever fails.
Thread
Thread Starter
Forum
Replies
Last Post
litch
4th Generation Maxima (1995-1999)
123
01-04-2024 07:01 PM
BPuff57
Advanced Suspension, Chassis, and Braking
33
04-16-2020 05:15 AM
magiconthetire
Audio and Electronics
2
10-26-2015 09:03 PM
maxima297
4th Generation Maxima (1995-1999)
4
09-30-2015 03:32 PM