How would I test the EGR sensor? Is it located INSIDE the EGR?
It is on Top of the EGR Valve as shown in this pic in an 88 5.8; Miesk5 Note EVP is light gray & attached to the top of the EGR Valve
Source: by Travis L (kemicalburns) at SuperMotors.net
Where would I place the leads? Sorry, very new to testing sensors and whatnot.
No problem; we were all at that point at least once in our lives;
EVP Connector pin-Out Diagram
by Ryan M (Fireguy50)
Testing & Operation; "...The EGR Valve Position (EVP) sensor monitors the position of the EGR valve pintle. The EVP sensor converts the mechanical movement of the pintle into an electrical voltage signal which is relayed to the PCM. The EVP sensor is a linear potentiometer in which resistance varies with the EGR valve pintle movement.Voltage is fed to the EVP by the signal return circuit. As the EGR is opened the EVP directs more voltage to the EEC and less down the voltage reference circuit. The EVP sensor provides the PCM with information on EGR flow and EGR system failures. The EVP should read between 0.24 and 0.67 volts at idle with a closed EGR valve..." read more
Source: by Ryan M (Fireguy50) at http://fordfuelinjection.com/index.php?p=35
Testing; "...Using the Haynes manual's procedures, you should be able to back-probe the EVP line and ascertain whether the EVP voltage is correct. It should be below 0.67V @ zero vacuum on the EGR, slowly increasing with applied vacuum from a hand pump. DO NOT apply more than 10 in-Hg to the valve..."
Source: by SigEpBlue (Steve) at FSB
Testing & Operation
Source: by Tomco Inc. tomco-inc.com
Is there a cheaper alternative to a vacuum pump other than using your mouth? The one I found at Autozone is about $55.00 and that seems a bit expensive.
Vacuum Pump Build Plans, DIY; built for less than $20, we call it the "Cheap Little Sucker"
Source: by Jame R and Tim C at http://www.berkut13.com/sucker.htm
Vacuum Pump Build Plans, DIY; convert a tire inflator-type air compressor into a vacuum pump
Source: by drcrash at http://www.instructables.com/id/conv...ressor-into-a/
Vacuum Pump Build Plans, DIY; make a manual vacuum pump for under $20 by converting a bicycle pump
Source: by drcrash at http://www.instructables.com/id/make-a-manual-vacuum-pump-for-under-$20-by-convert/
I think I may be over thinking this, but the vacuum line comes off of the EGR and leads down into a cluster of other vacuum lines. Is there a way to separate these easily without tearing the whole thing apart so I can test the lines?
Maybe I'm missing something obvious?