Ok, so my 01 disco has been ideling rough, w/o any trouble codes.My mechanic tested the fuel pressure and she is running three psi lower then it should be.If so does any one know where I can get a new fuel pump on line.All I can find is the fuel pump w/ secondary air. Any sugestions would be a great help.

 

1. some D2 had fuel pressure sensor that could be read by OBDII, some did not. Did he read by sensor (code scanner) or did he go under the intake and access the schrader valve?

2. What was the PSI he read? The spec is 50psi from the RAVE. 3 pounds low on 50 seems like that might not be the idle issue.

3. see Land Rover Fuel System Parts | Fuel Pump Discovery 2 for one source. Not sure what secondary air connection is - where did you see a pump that way? There is a secondary air pump, but that is on the engine, fuel pump and regulator are inside the fuel tank.

4. Before investing in pump to cure 47 pound reading (if that is what he saw), might want to consider the more normal items; plugs, wires, clean throttle body. clean IACV (the master control of idle, just don't move the plunger by hand). Clean the bore it is removed from as well. Clean MAF with correct cleaner when cold.

5. I'm not trying to over rule your mechanic, but a $400 - $500 fuel pump job might not be what is needed at this point. There are a lot of cheap or almost free things you can do before that.

 

heres is a bosch pump. part number w0133-1652164
autopartswarehouse.com

go to the website and put in the part number.

 

It probably is not your fuel pump, I would look at the other items Savannah suggested and get back to us. If you want to replace the fuel pumo get a used one wiht a warranty, it will cost only about $100 from a wrecker.

 

First, don't buy a used one with or without a warranty, they all wear out loosing pressure as they age so all you are doing is installing an older pump that most likely can't make proper pressure.
Second, find out exactly what your fuel pressure is, do npt trust a mechanic when they give you that sort of a statement. Also with pressure only 3 pounds lower then normal, you will not have an idle issue.
When was your truck last tuned along with new 8 mm silicone plug wires, what octane gas are you burning, when did you last clean your t/body and idle solenoid?

 

thanks for the reply's, well, these are all the parts I replaced, mass air flow censor, ideal air, tps, crank censor, plugs wires.I did clean the throutle body.He took the reading off the fuel rail= 47psi.The batt. and alternater is also new.

 

Stop throwing parts at your truck, send me your number and I'll call yo this weekend.