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Author
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Topic: $%#^%^ smog....need help with codes / ideas
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Blind
2.3L
CAFords OG
Member # 3052
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posted
 
 
Ok since most people will skim the post then say "buy this" I will list first off what is brand new and has already been replaced:
O2 wiring harness
both O2 sensors
ECT (replaced, but from another 5.0, so it is not brand new). - heater line coolant sensor
ACT sensor - intake manifold coolant sensor
Thermostat (195* prestone)
Other pertanent info:
100% stock engine from filter box to oil pan.
Stock headers
Stock 4-cat H pipe, known to have passed smog on my brothers car about a year ago
EGR is off his car as well
Just did a MAF swap this weekend because smog ref said I had to have MAF on my `89 to pass visual. - A9L computer and stock MAF.
smog #'s:
15mph / 1483rpm
%CO2 - 13.9 / %O2 - 1.3 / HC (PPM) 174 (121 max) / CO% - 0.18 (0.76max) / NO (PPM) - 1592 (807max)
25mph / 1636rpm
%CO2 - 14.2 / %O2 - 0.5 / HC (PPM) - 150 (96max) / CO% - 0.47 (0.65max) / NO (PPM) - 856 (746max)
He also failed me on the visual because my check engine light didn't work, side effect of the MAF swap, I geuss I need to add a LED on the dash from the EEC's check engine light output and label is "check engine" for the smog nazi's.
Upon scanning for codes I got the following but dont know what they are:
(engine running) 66 98
(engine off) 95 66 29
Smog ref said one of them was for fuel pump voltage, but I know that would be there as I didn't run a new wire for that when I did the MAF swap, he said that code is fine as long as it doesn't trip the engine light when I get one hooked up.
any ideas? I'm so close ![[Frown]](frown.gif) Last smog test the numbers for HC were in the 1000's so all the stuff I replaced helped a lot, but still need to make it run better
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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JoeT
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Member # 298
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posted
high HC sounds like still slightly too rich. was it nice and HOT, aka 195 degrees? ever shut the car off before it was tested?
a little methanol in the tank should do the trick at this point...
since your NOx #'s are (relatively) low, you can trade some NOx for HC I believe by messing with the timing (not sure), aka advancing it a hair...
did he test EGR function? it worked?
also, smog pump work ok?
[ November 29, 2004, 03:48 PM: Message edited by: JoeT ]
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1984 Ford Tempo AOD--- RIP
Posts: 6785 | From: San Jose | Registered: Jun 2001
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Blu50Stang
CAFords OG
Member # 489
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posted
quote:
Originally posted by blind:
Upon scanning for codes I got the following but dont know what they are:
(engine running) 66 98
(engine off) 95 66 29
29-VSS signal voltage is too low -> VSS is bad
66-MAF sensor out of range (signal voltage too low)-> MAF sensor is bad or not calibrated correctly.
95-FPM signal indicates circuit failure -> FPM senses fuel pump voltage is out of range.
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Ross
'88 GT - 5.0&SF 4/04 | MM&FF 8/09 | MM&FF 79-93 Mustang Performance Cover 12/12
'17 GT350R
Posts: 1916 | From: Not CA | Registered: Oct 2001
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Blind
2.3L
CAFords OG
Member # 3052
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posted
drove it from HMB to fremont via the 101 -> 237 route, took an hour.
The engine was turned off to do the visual check, then tested, it was still plenty hot because the fan was tripping on / off and it only trips when the coolent temp is 205 degree's.
Thanks for the codes! ![[patriot]](graemlins/patriot.gif)
VSS = not hooked up at all
FPM = did not add this line when I did the MAF swap
MAF bad...shit
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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JoeT
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Member # 298
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posted
I believe that 'bad maf' could be a stored code, aka no longer a KOER code...
can verify with a voltmeter during operation
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1984 Ford Tempo AOD--- RIP
Posts: 6785 | From: San Jose | Registered: Jun 2001
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Blind
2.3L
CAFords OG
Member # 3052
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posted
I highly doubt the MAF is a stored code, considering the MAF swap was done 3 days ago and the MAF has not been unplugged during that time.
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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Blind
2.3L
CAFords OG
Member # 3052
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posted
66 Vane Air Flow (VAF) or Mass Air Flow (MAF) signal low - VAF MAF
96 (O) Fuel pump monitor circuit shows no power - Power / Fuel Pump Circuits
(R) AIR Bypass (AIRB) not working - Air Injection
(M) (Service 87 code first if present) Fuel pump relay or battery power feed was open - Power / Fuel Pump Circuits
95 (O) Fuel pump: open, bad ground or always on - Power / Fuel Pump Circuits
(R) AIR not Diverting (AIRD) - Air Injection
(M) Possible bad fuel pump ground or open between fuel pump and pin 8 at PCM (Fuel Pump Monitor signal) - Power / Fuel Pump Circuits
98 (R) Did not pass KOEO yet (Get 11 in KOEO first)
98 looks like its nothing...
I may have the running / KOEO list of the codes reversed, in that case the AIRD valves arent opening? I geuss I get to check on that vacuume routing again, joy.
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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