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Off topic F150 question
I know this is off explorer topics, but any help would be appreciated,
it's about to get the best of me! Thanks for all of the help on both of my explorers , and my nephews also. 2001 SuperCrew F150 V8 4.6L 140K miles (highway) Problem: P0401 code (insufficient EGR flow) *Main problem!* Light blue smoke on startup (started 137K) probably valve seals. Uses a little oil now. About 1qt in last 3K miles. History: 100K Replaced spark plugs 125K (had P0401 code). Replaced DPFE and EGR valve (EGR valve was still good). Cleaned EGR pipe. Cleaned Throttle body which was completely clogged on the EGR ports. Reset code and it worked fine until now! 137K IAC valve went crazy and was replaced 140K P0401 code came back! Does anyone have any idea what I should try next to remove the P0401 (insufficient EGR flow) code? I checked the following things this weekend: 1. All hoses seem fine and have vacuum. 2. DPFE hoses are clean and both have air flow. 3. EGR valve will hold vacuum and the engine runs rough when it is engaged with vacuum at idle. (I think that is one of the tests) 4. The hose to the EGR has pulse vacuum at idle and the EGR solenoid valve has vacuum to it also. 5. I removed/inspected the throttle body again anyway and it appeared "clean", no ports clogged. 6. Reinstalled everything and code came back after about 75miles. What am I overlooking or have not tried? Any help would be appreciated! Thank you in advance for your help. Richard Grimes -- Cedartown Electronics ®RadioShack Dealer 22-A724 1572 North Main St Cedartown, GA 30125 (770) 749-0904 |
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#2
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Off topic F150 question
The DPFE sensor is the weakest link in the chain, but you should expect a
much longer service life than you seem to be getting. Have you been using aftermarket or OEM parts? You can test the DPFE with a vacuum pump and a DMM.... let me know if you want the procedure... "Cedartown Electronics" > wrote in message ... > I know this is off explorer topics, but any help would be appreciated, > it's about to get the best of me! Thanks for all of the help on both of > my > explorers , and my nephews also. > > 2001 SuperCrew F150 V8 4.6L > 140K miles (highway) > > Problem: P0401 code (insufficient EGR flow) *Main problem!* > Light blue smoke on startup (started 137K) probably valve > seals. > Uses a little oil now. About 1qt in last 3K miles. > > History: 100K Replaced spark plugs > 125K (had P0401 code). Replaced DPFE and EGR valve (EGR > valve was still good). Cleaned EGR pipe. Cleaned Throttle > body > which was completely clogged on the EGR ports. > Reset code and it worked fine until now! > 137K IAC valve went crazy and was replaced > 140K P0401 code came back! > > Does anyone have any idea what I should try next to remove the P0401 > (insufficient EGR flow) code? I checked the following things this > weekend: > > 1. All hoses seem fine and have vacuum. > 2. DPFE hoses are clean and both have air flow. > 3. EGR valve will hold vacuum and the engine runs rough when it is > engaged > with vacuum at idle. (I think that is one of the tests) > 4. The hose to the EGR has pulse vacuum at idle and the EGR solenoid > valve > has vacuum to it also. > 5. I removed/inspected the throttle body again anyway and it appeared > "clean", no ports clogged. > 6. Reinstalled everything and code came back after about 75miles. > > > > What am I overlooking or have not tried? Any help would be appreciated! > > Thank you in advance for your help. > > > > Richard Grimes > > > -- > Cedartown Electronics > ®RadioShack Dealer 22-A724 > 1572 North Main St > Cedartown, GA 30125 > (770) 749-0904 > > |
#3
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Off topic F150 question
Jim,
I bought a aftermarket DPFE (AutoZone, the black plastic one) about 6mo./15K miles ago. I might still have the old one in the garage, maybe. If so I will try to put it back on since it was not the problem the first time to see if the code will stay off.. The throttle body is still clean from 6mo ago. If you do not mind and have the time I would appreciate the test procedure. Thank you for the reply Richard Grimes "Jim Warman" > wrote in message news:RLNFf.263902$OU5.238212@clgrps13... > The DPFE sensor is the weakest link in the chain, but you should expect a > much longer service life than you seem to be getting. Have you been using > aftermarket or OEM parts? You can test the DPFE with a vacuum pump and a > DMM.... let me know if you want the procedure... > > > "Cedartown Electronics" > wrote in message > ... > > I know this is off explorer topics, but any help would be appreciated, > > it's about to get the best of me! Thanks for all of the help on both of > > my > > explorers , and my nephews also. > > > > 2001 SuperCrew F150 V8 4.6L > > 140K miles (highway) > > > > Problem: P0401 code (insufficient EGR flow) *Main problem!* > > Light blue smoke on startup (started 137K) probably valve > > seals. > > Uses a little oil now. About 1qt in last 3K miles. > > > > History: 100K Replaced spark plugs > > 125K (had P0401 code). Replaced DPFE and EGR valve (EGR > > valve was still good). Cleaned EGR pipe. Cleaned Throttle > > body > > which was completely clogged on the EGR ports. > > Reset code and it worked fine until now! > > 137K IAC valve went crazy and was replaced > > 140K P0401 code came back! > > > > Does anyone have any idea what I should try next to remove the P0401 > > (insufficient EGR flow) code? I checked the following things this > > weekend: > > > > 1. All hoses seem fine and have vacuum. > > 2. DPFE hoses are clean and both have air flow. > > 3. EGR valve will hold vacuum and the engine runs rough when it is > > engaged > > with vacuum at idle. (I think that is one of the tests) > > 4. The hose to the EGR has pulse vacuum at idle and the EGR solenoid > > valve > > has vacuum to it also. > > 5. I removed/inspected the throttle body again anyway and it appeared > > "clean", no ports clogged. > > 6. Reinstalled everything and code came back after about 75miles. > > > > > > > > What am I overlooking or have not tried? Any help would be appreciated! > > > > Thank you in advance for your help. > > > > > > > > Richard Grimes > > > > > > -- > > Cedartown Electronics > > ®RadioShack Dealer 22-A724 > > 1572 North Main St > > Cedartown, GA 30125 > > (770) 749-0904 > > > > > > |
#4
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Off topic F150 question
Well, after the P0401 code came back on my 4.6L F-150 and after checking
the hoses, EGR valve. vacuum, and throttle body. I replaced the Autozone DPFE with the original one. (I had saved it since it was not the problem in the first place (15K miles ago, a clogged throttle body was the problem). So 250 miles later the "replace engine soon" light is still off. If this holds true into next week I will purchase NO MORE CRITICAL parts from Autozone. Thanks to everyone for the help and maybe this will cure my problem! What a pain to replace "new parts"! NOTE: Thanks Jim for reminding me that just because it's new doesn't mean it is good or works. Richard "Jim Warman" > wrote in message news:RLNFf.263902$OU5.238212@clgrps13... > The DPFE sensor is the weakest link in the chain, but you should expect a > much longer service life than you seem to be getting. Have you been using > aftermarket or OEM parts? You can test the DPFE with a vacuum pump and a > DMM.... let me know if you want the procedure... > > > "Cedartown Electronics" > wrote in message > ... > > I know this is off explorer topics, but any help would be appreciated, > > it's about to get the best of me! Thanks for all of the help on both of > > my > > explorers , and my nephews also. > > > > 2001 SuperCrew F150 V8 4.6L > > 140K miles (highway) > > > > Problem: P0401 code (insufficient EGR flow) *Main problem!* > > Light blue smoke on startup (started 137K) probably valve > > seals. > > Uses a little oil now. About 1qt in last 3K miles. > > > > History: 100K Replaced spark plugs > > 125K (had P0401 code). Replaced DPFE and EGR valve (EGR > > valve was still good). Cleaned EGR pipe. Cleaned Throttle > > body > > which was completely clogged on the EGR ports. > > Reset code and it worked fine until now! > > 137K IAC valve went crazy and was replaced > > 140K P0401 code came back! > > > > Does anyone have any idea what I should try next to remove the P0401 > > (insufficient EGR flow) code? I checked the following things this > > weekend: > > > > 1. All hoses seem fine and have vacuum. > > 2. DPFE hoses are clean and both have air flow. > > 3. EGR valve will hold vacuum and the engine runs rough when it is > > engaged > > with vacuum at idle. (I think that is one of the tests) > > 4. The hose to the EGR has pulse vacuum at idle and the EGR solenoid > > valve > > has vacuum to it also. > > 5. I removed/inspected the throttle body again anyway and it appeared > > "clean", no ports clogged. > > 6. Reinstalled everything and code came back after about 75miles. > > > > > > > > What am I overlooking or have not tried? Any help would be appreciated! > > > > Thank you in advance for your help. > > > > > > > > Richard Grimes > > > > > > -- > > Cedartown Electronics > > ®RadioShack Dealer 22-A724 > > 1572 North Main St > > Cedartown, GA 30125 > > (770) 749-0904 > > > > > > |
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