Smog Abort Problems???
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Freshman User
Joined: Oct 2003
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From: Southern California
Smog Abort Problems???
Hey everyone, It's been a while for me here.
I've sold my Explorer but I need to smog it before the title can be transfered, anyway....
I smogged it back in March with a new IAC, no problems, now I've taken it twice this week and it keeps aborting the test. When they try to run it at 15mph/25mph the rpms bounce up and down from like 3000rpms to 2500rpms, continuously. But I found out tonight after installing new plugs, wire, and pcv that if I turn the truck off for a few seconds then start it up and run it at 3000rpms, no problems, for like 20 seconds then it does then start the samething again.
Any suggestions??? I am now starting to think that it might be a O2 Sensor, but not too sure....would really appreciate the the help!!!
I've sold my Explorer but I need to smog it before the title can be transfered, anyway....
I smogged it back in March with a new IAC, no problems, now I've taken it twice this week and it keeps aborting the test. When they try to run it at 15mph/25mph the rpms bounce up and down from like 3000rpms to 2500rpms, continuously. But I found out tonight after installing new plugs, wire, and pcv that if I turn the truck off for a few seconds then start it up and run it at 3000rpms, no problems, for like 20 seconds then it does then start the samething again.
Any suggestions??? I am now starting to think that it might be a O2 Sensor, but not too sure....would really appreciate the the help!!!
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Freshman User
Joined: Oct 2003
Posts: 27
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From: Southern California
I haven't had any codes pulled because the Check Engine light hasn't come on yet...could computer be generating code without presenting a Check Engine indication??? Otherwise I'll go to Autozone or Kragens tonight and have them scan it.
Postmaster
Joined: Oct 2003
Posts: 4,516
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From: SoCal
Not sure, but they might be able to pick up pending codes.
If you have a vacuum gauge hook it up to manifold vacuum & see if that gives you any clues.
If you're anywhere close to Placentia & need a very good shop to take this to if need be let me know.
If you have a vacuum gauge hook it up to manifold vacuum & see if that gives you any clues.
If you're anywhere close to Placentia & need a very good shop to take this to if need be let me know.
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Freshman User
Joined: Oct 2003
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From: Southern California
Well I did the check engine flash codes by grounding out the Self-test In terminal...picked up code 542, (Fuel pump circuit failure)... earlier today I disconnected the battery to try and reset the computer due to replacement IAC. So this code was detected with only 30 minuets of engine run time and about 10 miles distance on it. Suggestion on how to test fuel pump or circuitry???
Thanks, XLT, not sure where Placentia is but I live in Valencia...
Thanks, XLT, not sure where Placentia is but I live in Valencia...
Postmaster
Joined: Oct 2003
Posts: 4,516
Likes: 1
From: SoCal
542 is open fuel pump circuit between EcA/computer and engine ground.
Take a look at your wiring diagram, if yours is wired the same as my 87 the computer & battery are grounded together at the engine block.
Make sure that connection is clean & tight.
Good luck with it.
FYI Placentia is near Anaheim.
Take a look at your wiring diagram, if yours is wired the same as my 87 the computer & battery are grounded together at the engine block.
Make sure that connection is clean & tight.
Good luck with it.
FYI Placentia is near Anaheim.
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