Vibrates at Idle, Help Please!!!

Question:

Good luck Rick.  Glad to help a fellow Washingtonian!

– Hide quoted text — Show quoted text -> Thanks for the input. I’m going to take a quick look at the EGR, It’s easy > enough. But I believe Rob may be right. The pressure should be in spec. I > haven’t gone after that yet because the regulator is part of the pump in > the tank. But get this, I notice a definite difference from when tank is > full to tank low. It’s lookin more and more like the pump.

Response:

 > I’ve been battling this for over a year. Any suggestions???  >  > This is a 2000 Ford Explorer. 4.0 SOHC with 88K mi. –  > Originally a Canadian  > car, now in Washington state.  > It runs great but idles crummy, much more in gear, then in  > park. It sort of  > vibrates, and shudders a little. Just enough to make things  > rattle. Never  > dies though.  >  > ALLDATA indicates idle speed spec. is:  Hot Idle 670-750  > Scan tool shows avg. idle is 645 in gear.  > ALLDATA indicates – low idle, look at fuel, and or ignition?  > ALLDATA indicates  - vehicle has foul resistant injectors,  > should not  > require cleaning.  >  > ALLDATA indicates – Fuel spec. 30 – 65 lbs.  > Tested = Idle in gear 65 – 69 / Idle in park 66 – 68  (never  > drops to 30)  > Leak down test – Fuel system dropped 15lbs. immediatly, then  > held for  > several minutes.  > This vehicle uses a mechanically regulated non – return type  > fuel pump  >  > 88k Miles  > 20k ago changed, plug wires, fuel filter.  > Last 6 months changed, spark plugs, IAC, air filter, cleaned  > the MAF sensor,  > two applications of injector cleaner, and cleaned the throttle  > body.  >  > I think something is causing it to idle too slow. Do you think  > a slightly  > high fuel pressure will do that?  >  Also fuel pressure spec indicates 30 to 65. This car doesn’t  > drop to 30.  > but I don’t see how it could, because the system uses a spring  > loaded bypass  > at the pump for regulation.  >  > Thanks again, Rick hi  im having the same problem with my 95 explorer. when i come to a light it seems like it wants to stall but it do

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