is it safe to unplug the EGR valve to test to see if it's bad? - Insight Central: Honda Insight Forum
 
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Old 05-14-2012, 09:02 PM   #1 (permalink)
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Default is it safe to unplug the EGR valve to test to see if it's bad?

I just bought a 2001 honda insight manual with 170k. i drove the car over 200 miles fine then all of a sudden i got the engine hesitation when accelerating up a hill one day. I'm wanting to know if it's safe to unplug the EGR valve to test to see if that's the problem? I'm gonna drive it a mile to see if it'll still doing the same thing. Could this damage the engine or ECU or anything else in anyway? I'm just trying to test to see if the EGR valve is the problem
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Old 05-14-2012, 09:05 PM   #2 (permalink)
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It is safe and it is suppose to work, but, when I tried this, it was so bucking, that it was scary. The best way to test it, is to try another one.
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Old 05-14-2012, 09:07 PM   #3 (permalink)
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it was bucking worse after you unplugged it and the EGR valve was still the culprit?
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Old 05-14-2012, 09:52 PM   #4 (permalink)
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Quote:
Originally Posted by george855 View Post
it was bucking worse after you unplugged it and the EGR valve was still the culprit?
I endup replacing o2 sensor.
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Old 05-14-2012, 09:58 PM   #5 (permalink)
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Go ahead and unplug it. It won't hurt anything, I promise, except give you a check engine light which you can reset later.
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Old 05-14-2012, 11:47 PM   #6 (permalink)
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If you drive the car long enough to reach full operating temp - THEN pull over unplug the EGR it will not give you a code until the next time you start the car. This is a good way to test the EGR because the with and without comparison is immediate.
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Old 05-15-2012, 10:00 PM   #7 (permalink)
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i cleaned the egr valve, drove the car, and still the rpms were bouncing up and down when i was driving around. I only drive it for a couple of minutes, then i unplugged the EGR valve, drove it, and it didn't make a difference either. does that mean it's not the EGR valve? If not any ideas? It never gave me a code when i unplugged the egr valve either.
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Old 05-15-2012, 10:15 PM   #8 (permalink)
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Idle control valve or a vacuum leak.
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Old 05-17-2012, 06:35 PM   #9 (permalink)
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i took it to a honda mechanic today and they said something is wrong with the fuel system. they said something like the psi on the fuel pump is supposed to be 40 psi and i'm only putting out 10 or 20 psi. all i can do now is pray they don't rape my wallet too hard.
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Old 05-17-2012, 06:59 PM   #10 (permalink)
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It could also be a vacuum leak or a bad regulator. (The regulators are rare to be defective.) The "sock" filter on the fuel pump could also be clogged.
(What ever parts they replace you are entitled to get back the old parts.)
I would vote for a vacuum leak.
Easiest to check.
HTH
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