Insufficient egr flow detected
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Joined: Oct 2003
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Insufficient egr flow detected
I have a 1996 E.B. 5.0L .Check engine light has been on for a while , I finally got codes read. Insufficient egr flow detected came up, the guy at advanced auto assured me it was the egr valve, $60 dollars later installed new egr valve and reset computer, 30 miles later light is back on with same code. How could i diagnose the problem? thanks.
Fleet Mechanic
Joined: Aug 2001
Posts: 1,526
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From: Round Rock, TX
You've got that DPFE setup. Did you happen to change the sensor, or just the valve? Could be a faulty sensor.
The test procedure is far too long to post here. If you would enable email in your profile, I could send it to you.
The test procedure is far too long to post here. If you would enable email in your profile, I could send it to you.
Posting Guru
Joined: Jan 2001
Posts: 2,358
Likes: 3
From: Nebraska
Check for vacuum leaks first. Those plastic hoses crack easily and it can cause "insufficient flow" if vacuum can't get to the EGR valve.
Does '96 still use a sensor on top of the valve? If so that could be your problem. It can be tested with a voltmeter and vacuum pump.
If those check out fine, it's probably the EGR vaccum regulator (EVR). It's on top of the engine near the coil. It's a fairly cheap part from Ford (no parts store I asked could get one).
Does '96 still use a sensor on top of the valve? If so that could be your problem. It can be tested with a voltmeter and vacuum pump.
If those check out fine, it's probably the EGR vaccum regulator (EVR). It's on top of the engine near the coil. It's a fairly cheap part from Ford (no parts store I asked could get one).
Senior User
Joined: Dec 2002
Posts: 173
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From: Akron
I am not sure about the 90's models but the 80's had a tube the ran from the back side of each hea and if it became clogged it would send the EGR as being bad .......by the time i figured it out , mine all ready had a 4BBL and headers
Fleet Mechanic
Joined: Aug 2001
Posts: 1,526
Likes: 0
From: Round Rock, TX
'96 uses a DPFE setup. There's a sensor box mounted on the box and it measures pressure from several places. It's more complicated than what you find on the '86-95 setups.
I've emailed the test procedure; check your email. If anybody else is interested, enable your email and let me know.
I've emailed the test procedure; check your email. If anybody else is interested, enable your email and let me know.
Last edited by bigric; Mar 5, 2004 at 11:14 PM.
