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thanks o2 sensors were replace at 100k intake gaskets too, fuel pump as well fuel filter change 2 times in 120k, doesn't have the elbow seems to run fine at full speed??? any other thoughts???? coil? thanks in advance

need help 2001 rough idle P0133 code 120,000 miles new MAF thoughts?

did the sensors fix it? I took mine to a shop had the same codes and slight hiccup during idle still have the 170 and 174 codes

had to take the truck in for smog did the "smoke leak test" replaced the EGR passed smog with flying colors but engine light came back on mechanic says it might be the MAF but has no way to check it? help!!!!:(

just changed the dpfe went another 200 miles CEL with P171 174 idles slighty rough any other ideas??

doesnt have the famous elbow changed both upper and lower gaskets went 200 miles got about 10% better mpg andthen the engine just quit at a stop sign next day engine light came on with P 171 and 174 again also notice a slight rough idle EGR checks OK Pcv...

changed both upper and lower gaskets went 200 miles got about 10% better mpg and engine just quit at a stop sign next day engine light cam on with P 171 and 174 again also notice a slight rough idle EGR checks OK Pcv changed all hoes look good any other...

thanks It does'nt look too difficult to replace the gasket I have about 92k on it

My sport trac doesnt have that elbow

I have read most the posts on this I have 2001 Job 1 so no cracked vaccum elbow Light comes on after about 15 minutes Did all the cleaning projects and changed the PCV anything else? what am I missing thanks in advance!!!!!!!!