OBD-1 Code help...
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Senior User
Joined: Feb 2010
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From: Bear, DE
OBD-1 Code help...
Well the truck failed emissions today. I seem to not be able to decode the CEL with the blinks. So I took a video, I was hoping someone would be able to help me figure out the codes. So I can get the truck though inspection.
Here's a link to the video:
1992 F150 4x4 :: f6df42d8.mp4 video by payupsuka - Photobucket
Any help is appreciated!
-Mike
Here's a link to the video:
1992 F150 4x4 :: f6df42d8.mp4 video by payupsuka - Photobucket
Any help is appreciated!
-Mike
More Turbo
Joined: Jun 1999
Posts: 532
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From: Las Vegas
From what I can decipher, the firsts two codes are 11; 11. The second two are 33; 33. If memory serves me right, the single blink is a separator code. The 11 code is "System Pass". The other two is for (I believe) an EGR malfunction code. I'll have to run and verify this, so I'll get right back to you. But someone may post before I get back with a correction.
Lead Driver
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Posts: 9,555
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From: Concord, NC
There is a 11 (repeated) meaning all clear, then a separator blink, then 33 (repeated). 33 indicates that EGR valve opening was not detected. It could be an intermittent problem since it was stored in memory. What part of the emissions test are you failing?
EEC-IV self test info and code definitions: EEC IV Self Test hookup
EEC-IV self test info and code definitions: EEC IV Self Test hookup
More Turbo
Joined: Jun 1999
Posts: 532
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From: Las Vegas
EPNCSU2006, thanks for confirming that, I was just about to post what you just said. Mike, you may also want to run an Engine Running self test too. It could show other faults then too. When my truck failed emissions, the ER self test showed a code for the TAB and TAD system. I ended replacing the solenoids for both the TAB and TAD valves. Also replaced the O2 sensor for good measure. It passed then, and it passed again a year latter. Not saying that this will be your problem, just throwing it out there for info purposes.
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From: Bear, DE
There is a 11 (repeated) meaning all clear, then a separator blink, then 33 (repeated). 33 indicates that EGR valve opening was not detected. It could be an intermittent problem since it was stored in memory. What part of the emissions test are you failing?
EEC-IV self test info and code definitions: EEC IV Self Test hookup
EEC-IV self test info and code definitions: EEC IV Self Test hookup
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From: Bear, DE
Ok, here's the KOER test video:
1992 F150 4x4 :: a0ecb3bf.mp4 video by payupsuka - Photobucket
I'm gonna watch it a few times myself and see if I can figure it out some.
1992 F150 4x4 :: a0ecb3bf.mp4 video by payupsuka - Photobucket
I'm gonna watch it a few times myself and see if I can figure it out some.
Lead Driver
Joined: Nov 2002
Posts: 9,555
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From: Concord, NC
21, 41, 52, and 77. The one I would focus on is 41: O2 sensor indicates lean, no switching. When is the last time the spark plugs and ignition components were replaced? What about the O2 sensor? High HC indicates excess fuel or an incomplete burn. If there is an ignition misfire, the O2 sensor will report lean and the computer will enrich the mixture, possibly making the high HC problem worse. I would fix the misfire first, then if the O2 sensor code is still there and it's been a while since it was replaced, replace the O2 sensor.
21 is probably because the engine isn't fully warmed up, 52 and 77 were set because the computer didn't receive the input it needed during the test. The very first flash after the engine speed settles into idle is your cue to give the throttle a quick stab, turn the wheel 1/4-1/2 of a turn (and touch the brake pedal and push the o/d cancel switch if an electronic automatic). If you run it again, I bet those three go away.
21 is probably because the engine isn't fully warmed up, 52 and 77 were set because the computer didn't receive the input it needed during the test. The very first flash after the engine speed settles into idle is your cue to give the throttle a quick stab, turn the wheel 1/4-1/2 of a turn (and touch the brake pedal and push the o/d cancel switch if an electronic automatic). If you run it again, I bet those three go away.
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From: Bear, DE
21, 41, 52, and 77. The one I would focus on is 41: O2 sensor indicates lean, no switching. When is the last time the spark plugs and ignition components were replaced? What about the O2 sensor? High HC indicates excess fuel or an incomplete burn. If there is an ignition misfire, the O2 sensor will report lean and the computer will enrich the mixture, possibly making the high HC problem worse. I would fix the misfire first, then if the O2 sensor code is still there and it's been a while since it was replaced, replace the O2 sensor.
21 is probably because the engine isn't fully warmed up, 52 and 77 were set because the computer didn't receive the input it needed during the test. The very first flash after the engine speed settles into idle is your cue to give the throttle a quick stab, turn the wheel 1/4-1/2 of a turn (and touch the brake pedal and push the o/d cancel switch if an electronic automatic). If you run it again, I bet those three go away.
21 is probably because the engine isn't fully warmed up, 52 and 77 were set because the computer didn't receive the input it needed during the test. The very first flash after the engine speed settles into idle is your cue to give the throttle a quick stab, turn the wheel 1/4-1/2 of a turn (and touch the brake pedal and push the o/d cancel switch if an electronic automatic). If you run it again, I bet those three go away.
I'm gonna try just the plug's first then go from there. The PO said the MAP sensor was bad, but it's not throwing a code so I guess it's ok? I got a few idea's as this is the same engine as in my race car.. So I'm gonna try them out and report back.
I appreciate the help Eric!
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From: Bear, DE
So did basicily the "6liter" tuneup today. Replaced the plugs with autolight 25's gapped @ .54, new wires and a new MSD coil. The cap and rotor where in good shape.
Fired the truck up and still had a slight miss.
Tomorrow I'm gonna check the base timing, the fuel pressure and replace the O2 sensor.
Fired the truck up and still had a slight miss.
Tomorrow I'm gonna check the base timing, the fuel pressure and replace the O2 sensor.
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From: orange ma
a 92? id tell em take their emissions and ram it up their ****in *** 10 yrs is limit here then its exempt thats bs. how the hell u get your light to flash my 96 f2 460 is ob1 so cant test it easy lol its been so long i forgot how to do it
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From: Bear, DE
I have a cracked manifold so I'm gonna fix that first before I change the o2 sensor.
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Joined: Apr 2011
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From: orange ma
Haha my truck isn't exempt, my old diesel was though. Um to get the codes to flash just use a paper clip between the little single connector and the 2nd slot on the top of the bigger connector.
I have a cracked manifold so I'm gonna fix that first before I change the o2 sensor.
I have a cracked manifold so I'm gonna fix that first before I change the o2 sensor.
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