EGR tube vacuum leak?

[ehnco]

I have a '96 XLT (pushrod V-6). With both codes for system lean P0171 & P0174 both banks. Runs excellent. I cleaned the MAF, replaced the driver's side 02 sensor (it was cracked around the top where the wiring harness is attached). Started to run a little better with the new O2. Light came back on in 3 drive cycles. Both codes are still present. Last summer the EGR tube had a vacuum leak where the tube enters the intake manifold. I suspect this is still the problem area. I heard (a rumor from a mechanic friend) that Ford had redesigned the gasket for this (actually a large rubber o-ring). Anyone else hear this or have a part number? Other than a very occasional roughness/stumble at idle, it runs excellent. (107,000 miles). I plan to do a vacuum leak test this week.....

 

[BauerExplorer]

if you have the sohc, check to see if your truck has had the 00M12 kit installed

 

[ehnco]

Is the pushrod V-6 and SOHC the same ? How do I check if it was done?

 

[BauerExplorer]

im not sure, check the eighth letter in your vin, if it is an e you have an sohc if it is an x, you have the ohv

 

[BauerExplorer]

the only way to know if it was done is if ford did it, they would have it on record

 

[ehnco]

I have the OHV, eighth digit is an X....

 

[BauerExplorer]

do you know when the last time your plugs were changed?