Failed Emissions - Not even close
02-22-2005, 10:01 AM
#1
Registered User
Thread Starter
Join Date: Feb 2005
Location: Albuquerque, NM USA
Posts: 57
Failed Emissions - Not even close
Hello, this is my first post to this forum, as my '83 280ZX NA has never given me any grief, til now. Here's the numbers at 2529 RPMs:
HC Reading = 2357, Limit = 220
CO Reading = 9.57, Limit = 1.20
Background of my car:
I'm the 2nd owner, and it has 123,000 miles, about 6000 miles per year. I just did the following about a week ago - Mobil 1 oil, Oil Filter, NGK Plugs, Fuel Filter, EGR Valve, Cleaned the K&N Air Filter, new Turbo Muffler. About 4 months ago, I had the dizzy rebuilt by Kim at Idaho Z. And over the last couple of years, I've replaced the Plug Wires, Dizzy Cap & Rotor.
My mileage has definitly dropped, now at about 16.5 MPG, seems like it was around 20 MPG when I bought the car about 5 years ago. The car's running pretty good.
TIA...Robert
HC Reading = 2357, Limit = 220
CO Reading = 9.57, Limit = 1.20
Background of my car:
I'm the 2nd owner, and it has 123,000 miles, about 6000 miles per year. I just did the following about a week ago - Mobil 1 oil, Oil Filter, NGK Plugs, Fuel Filter, EGR Valve, Cleaned the K&N Air Filter, new Turbo Muffler. About 4 months ago, I had the dizzy rebuilt by Kim at Idaho Z. And over the last couple of years, I've replaced the Plug Wires, Dizzy Cap & Rotor.
My mileage has definitly dropped, now at about 16.5 MPG, seems like it was around 20 MPG when I bought the car about 5 years ago. The car's running pretty good.
TIA...Robert
02-22-2005, 10:34 AM
#2
The Evil Twin
Join Date: Mar 2001
Location: Seattle, WA
Posts: 9,294
Replace the fuel pressure regulator! Your fuel pressure is probably sky high.
That's what mine was like. If you idle your car for a while (30 secs) and then give it a quick rev, do you see black smoke shoot out?
My stupid car failed emissions for the second time now... it got worse barely. I'm going for a new oxygen sensor next. Oh, replace your oxygen sensor too along with the pressure regulator.
That's what mine was like. If you idle your car for a while (30 secs) and then give it a quick rev, do you see black smoke shoot out?
My stupid car failed emissions for the second time now... it got worse barely. I'm going for a new oxygen sensor next. Oh, replace your oxygen sensor too along with the pressure regulator.
02-22-2005, 12:36 PM
#4
The Evil Twin
Join Date: Mar 2001
Location: Seattle, WA
Posts: 9,294
Yes, Napa should have both. Or, if they don't you can order them online from Importedcarparts.com
Page 2 and 3 of my Zdriver gallery has some Fairlady Z pictures.
https://www.zdriver.com/gallery/show...500&ppuser=464
Page 2 and 3 of my Zdriver gallery has some Fairlady Z pictures.
https://www.zdriver.com/gallery/show...500&ppuser=464
02-22-2005, 02:29 PM
#5
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Thread Starter
Join Date: Feb 2005
Location: Albuquerque, NM USA
Posts: 57
I'm looking at my FSM. When you say Oxygen Sensor, is that the same as the Air Regulator?
Where did you get that '70 Fairlady Z? I've seen a Fairlady ZX here in ABQ, but the guy had swapped drive trains.
Where did you get that '70 Fairlady Z? I've seen a Fairlady ZX here in ABQ, but the guy had swapped drive trains.
02-22-2005, 02:55 PM
#6
The Evil Twin
Join Date: Mar 2001
Location: Seattle, WA
Posts: 9,294
The oxygen sensor is on the exhaust manifold. The air regulator is the Air Flow Meter on the intake pipe.
I got the Fairlady Z in Washington. Its one in a million chance to find one. Especially the early ones with original drivetrain.
I got the Fairlady Z in Washington. Its one in a million chance to find one. Especially the early ones with original drivetrain.
04-25-2005, 08:07 AM
#7
Registered User
Thread Starter
Join Date: Feb 2005
Location: Albuquerque, NM USA
Posts: 57
Passed Emissions
In case anyone cares, here's what I did to get thru emissions
1) Replaced the fuel pressure regulator
2) Replaced the O2 sensor
3) Replaced all vacuum lines
4) Fixed a leaking injector
Thanks for your suggestions BleachZee...Robert
1) Replaced the fuel pressure regulator
2) Replaced the O2 sensor
3) Replaced all vacuum lines
4) Fixed a leaking injector
Thanks for your suggestions BleachZee...Robert
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