System Lean Bank 1 and 2

[Mutant Pony]

There was a Tech bulletin from Ford for the Windstar throwing a 170 and 171 at the same time. It was a loose vacuum hose going to the fuel pressure regulator. The fix was to put a plastic tie(zip tie) on it.

 

[stock95ranger]

My 95 has the same codes and you should do what everyone else has said. And as for the way the EGR tube seals in the intake is a rubber o-ring. All you have to do is remove the upper intake and replace that O-ring and it should seal back up. Be careful when you put the upper intake back on so that you don't pinch your new o-ring.

 

[Stranger ranger]

My motor is throwing the same codes. About the oil getting on the gaskets and making them swell, this sounds about right in my case, cause the truck I took the motor out of was a roll over totaled truck, in which the 4.0 was hydro locked with oil. I had to pull the plugs and pump it all out before it would even turn, but after doing so it fired instantly. The motor is fine, but i had oil everywhere and before I put it into my truck, I Gunked the shit out of it. So the gaskets being bad is not so unbelievable in my case.

 

[bigred]

Well, I figured out what was wrong. I did a DIY project and put on a Thrush Magnum Glasspack on it. well, the Glasspack doesnt shoot back enough air, throwing off the O2 sensors. So, im going to get the local guys to install a flowmaster 40 series straight pipes out the rear for 180.00

 

[Zonker]

My 95 has the same codes and you should do what everyone else has said. And as for the way the EGR tube seals in the intake is a rubber o-ring. All you have to do is remove the upper intake and replace that O-ring and it should seal back up. Be careful when you put the upper intake back on so that you don't pinch your new o-ring.

thanks for the info. I have ordered a new seal from my local Ford dealer. One more question if you would...can I install the o-ring by removing the EGR and lowering the tube instead of removing the intake? In the picture the dealer showed me, it appeared as if the tube might have a bend at the top that could preclude removal by this method. I have also toyed with the possibility of just wrapping the leaky joint with heat shrink tubing-any comments on this hairbrained idea?


TIA
Zonker

 

[Wicked_Sludge]

Well, I figured out what was wrong. I did a DIY project and put on a Thrush Magnum Glasspack on it. well, the Glasspack doesnt shoot back enough air, throwing off the O2 sensors. So, im going to get the local guys to install a flowmaster 40 series straight pipes out the rear for 180.00

what makes you think its the glasspack causing the problem?

i seriously doubt it has anything to do with your exhaust...especially if you havnt touched the cats.

 

[stock95ranger]

Zonker,
you can't get the EGR tube out of the intake because of the bend in the tube. I think it works best if both the intake plenum and the EGR tube is loose. And as for using heat shrink tubing I wouldn't reccomend it just because it would suck really bad if you sucked the piece of tubing through your intake and into the engine.

 

[BrokeRecord]

My 99 ~ 4.0 did great as long as the air temp was over 40*, but, on a morning that was 30s* or colder, it was gonna throw either left or right bank. Mostly the left. I carried my OBDII meter on the pass seat during winter and the light would come on after it warmed the water temp. I plugged in and removed the error for the day. Ford said the enricherner was a little too drippy and caused a small backfire every day on cranking cold. Also the 1st couple years of OBDII Ford V6 computers were way too picky on backfires. I just learned to live with mine. I hope my 07 is cured!!