|
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
|
