NEED HELP PLEASE with code 33
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Senior User
Joined: Apr 2007
Posts: 107
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From: Greenville, KY
NEED HELP PLEASE with code 33
Can someone please help me.
I've replaced egr valve & evp sensor, & still get code 33.
Vacuum lines are ok, coffee can has no holes, what else can it be?
I've replaced egr valve & evp sensor, & still get code 33.
Vacuum lines are ok, coffee can has no holes, what else can it be?
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
Did you put a hand vac directly on the EGR valve and verify it does open?
I hear or rather read here you can suck on the line with your mouth as a test of sorts. Haven't tried that one but sounds like it would work in a pinch, a quick test at least show it does move?
It should hold vacuum, not leak down. Drawing some odd 8 to 12hg of vac on it should drop the idle a couple hundred rpm's or a little more as the motor stumbles, more should tend to or stall it right out.
I hear or rather read here you can suck on the line with your mouth as a test of sorts. Haven't tried that one but sounds like it would work in a pinch, a quick test at least show it does move?
It should hold vacuum, not leak down. Drawing some odd 8 to 12hg of vac on it should drop the idle a couple hundred rpm's or a little more as the motor stumbles, more should tend to or stall it right out.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
If you can read the codes you can clear the codes, it's better to do that than wipe out the whole computer memory by disconnecting the battery. This is because it may take several drive cycles for the computer to relearn the necessary fuel and timing adjustments and get back to the condition where the code was set, and when it does if you didn't properly fix the problem the code will come back. So this just wastes time, if the codes were just cleared you would know almost immediately if the problem is correctly fixed.
Code 33 says EGR valve movement wasn't detected. So that indicates it didn't move when commanded(bad EVR), the position sensor is faulty(EVP), or the vacuum line between the EVR and EGR valve is broken.
Code 33 says EGR valve movement wasn't detected. So that indicates it didn't move when commanded(bad EVR), the position sensor is faulty(EVP), or the vacuum line between the EVR and EGR valve is broken.
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
Oh chit, I see now I misread your first post.
I've replaced egr valve & evp sensor, I read that as evr, as in the two most likely, and certainly the cheapest, parts of that system to fail where replaced first......
Of course a new EGR valve would open with vac applied to it!
I've replaced egr valve & evp sensor, I read that as evr, as in the two most likely, and certainly the cheapest, parts of that system to fail where replaced first......
Of course a new EGR valve would open with vac applied to it!
Thread Starter
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Senior User
Joined: Apr 2007
Posts: 107
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From: Greenville, KY
Found my problem guys, the solenoid has 2 nipples for the 2 vacuum lines. When I slid the vacuum lines on I missed one of the nipples.
I have found out that I have a bad FPR. I hope when I get this replaced it will take care of my running rich.
Thanks for all your help
I have found out that I have a bad FPR. I hope when I get this replaced it will take care of my running rich.
Thanks for all your help
