1992 F150 stalls and code help
#1
1992 F150 stalls and code help
1992 F 150 5.0 e40d Original Owner 204000 miles.
Yesterday the truck started stalling when I came to a stop. It has never happened before. It starts up, idles and runs fine. The hotter it got the worse it got until it was stalling when I slowed to make a turn.
I cleaned throttle body, IAC, checked for vacuum leaks and attempted to read codes.
Codes are all Knock sensor low input circuit 1 and 2, crankshaft position sensor,ignition engine speed input intermittent.
I am clueless on these codes or what to do next.
I appreciate any help as this is my daily drive.
Yesterday the truck started stalling when I came to a stop. It has never happened before. It starts up, idles and runs fine. The hotter it got the worse it got until it was stalling when I slowed to make a turn.
I cleaned throttle body, IAC, checked for vacuum leaks and attempted to read codes.
Codes are all Knock sensor low input circuit 1 and 2, crankshaft position sensor,ignition engine speed input intermittent.
I am clueless on these codes or what to do next.
I appreciate any help as this is my daily drive.
#3
#4
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I don't have my manuals for the older stuff handy ATM, but that's probably a DPFE issue, off the top of my head.
A bad DPFE or EVP sensor (I forget which your truck has) is one of the possible causes for your initial symptoms, along with a number of other things.
A bad DPFE or EVP sensor (I forget which your truck has) is one of the possible causes for your initial symptoms, along with a number of other things.
Last edited by projectSHO89; 08-28-2015 at 11:56 PM.
#6
I have a bunch of manuals for my truck that I bought along with the new truck but I don't have one with codes but what I found internet searching:
"327 Electronic pressure transducer differential pressure feedback exhaust DPFE sensor/Electronic Vacuum Regulator EVR.
Yesterday I warmed the truck in the driveway for thirty minutes and then drove it around the neighborhood and down the road for thirty minutes and it did not act up but I had driven harder and longer when it did mess up so I am not sure.
I did find one thing and don't know if it is a possibility. The plastic lock on the EGR valve electrical connector is broken and allows the plug to wiggle, it was fairly loose but wouldn't have ever come out.
I secured it with tyraps until I get a new connector but could that be part of the problem?
Also from my searching for DPFE Sensor it says get a Motorcraft one or I will have problems again.
I appreciate all the help.
"327 Electronic pressure transducer differential pressure feedback exhaust DPFE sensor/Electronic Vacuum Regulator EVR.
Yesterday I warmed the truck in the driveway for thirty minutes and then drove it around the neighborhood and down the road for thirty minutes and it did not act up but I had driven harder and longer when it did mess up so I am not sure.
I did find one thing and don't know if it is a possibility. The plastic lock on the EGR valve electrical connector is broken and allows the plug to wiggle, it was fairly loose but wouldn't have ever come out.
I secured it with tyraps until I get a new connector but could that be part of the problem?
Also from my searching for DPFE Sensor it says get a Motorcraft one or I will have problems again.
I appreciate all the help.
#7
Oh, A little light bulb is starting to come on. I did not realize the DPFE sensor is on top of the EGR valve. A picture I looked at showed it under the plastic cover for the throttle linkages.
That is the one that had the loose connector. Also I changed it years ago to fix a CEL and it worked for about a year and the light came back on. The light has flicked on and off randomly ever since but it has always passed state Emissions Inspection so I just ignored it.
I did use a sensor from the parts store too.
I will get one from Ford this time.
That is the one that had the loose connector. Also I changed it years ago to fix a CEL and it worked for about a year and the light came back on. The light has flicked on and off randomly ever since but it has always passed state Emissions Inspection so I just ignored it.
I did use a sensor from the parts store too.
I will get one from Ford this time.