Where is my vacuum pump on jeep

One thought. Diesel engines do not produce vacuum. Since the heat and AC controls are vacuum actuated, and you have no heat, the main flap over the heater core is not being opened to allow the heat to come into the cab. Meaning it's getting no vacuum. Check that all vacuum lines are connected from the vacuum pump, then check that the vacuum pump is working. If the vacuum pump is not pulling vacuum, there's your problem. Makes sense, huh?

2001 ,? 2.7L USA jeep???????
my guess it cranks ok.
fuses ok
immobilizer not active, SKIS/SKIM.?
so compression is at spec.
and if it is ,test fuel diesel works?????
Glow plugs work? (we measure current)
then filters
then pump
scan pcm for errors, not all errors glow the silly CEL lamp.
page 1269 in jeep manual, usa, 2000

no year, state
or which diesel this is... the 2.5L?
direct injected or the old mech, pump diesel.
is this the one in Europe? (this is USA forum so....)

1995-1999 2.5 L TURBO DIESEL VM Motori/Detroit Diesel

for what? WJ sure.

3.1 liter turbo diesel.
2000.
our books (USA) don't cover diesel , we dont have it. try EU, forum for help.
we have GAS.
the wiki tells me this.
I'd not touch it with out your real FSM on this. from JEEP (your country)
my guess a supplement booklet on this TD? at Jeep.

quote:
The 3.1 litre turbo-diesel on the 1999 Grand Cherokee was developed in conjunction with Detroit Diesel/VM Motori. It has an electronic injection pump, electronically-controlled, vacuum-actuated exhaust gas recirculation, and a special catalyst to control oxides of nitrogen (NOx). Manufactured in Cento, Italy, at 13,000 units per year. It was available in European models and meets the European stage III emissions.

• Displacement: 3,124 cc (191 cu in)
• Power: 104 kW (141 PS; 139 bhp)
• Torque: 367 N·m (271 lb·ft)
• Transmission: Four speed electronically controlled automatic

The vacuum pump in the Dodge W150-350 Cummins Diesel is integral with the power steering pump on the driver's side of the engine. remove it as one unit from the accessory drive unit. Then you have to press the gear off the shaft to separate the power steering pump from the vacuum pump

The diesel injection pump is responsible to deliver the diesel to the engine and to control the speed of the engine by matching the fuel output requirement of the engine. You can get Diesel Injection pump for all models especially for your Jeep Cherokee at http://www.dieselpartspros.com/diesel-injector-pump.asp

Hi Because your jeep is a diesel there is a vacuum pump driven by the engine which supplies
Vacuum to the brake servo unit ( Thats the big circular thing that the brake master cylinder is attached to )
The problem could be the pump, the servo,or simply a vacuum leak ( between the pump and servo )
you would normally be able to hear a vac leak.
If you are able to pull the hose off the servo hold your thumb over the end of it and you should feel strong suction
If you apear to have good suction then the problem is the servo itself (leaking vac internally )
I hope your problem turns out to be a simple one good luck
John( South Wales UK )

diesels do not have conventional vacuum operated brake boosters. i am not sure what chrysler calls there system, but i believe it is similar to the gm hydroboost system, in which case pressure is created by a pump integral to the power steering pump gives you your assist, and fed to an accumulator on the fluid booster near the master. be very careful when tinkering when these systems, as they can have very high pressures in them even when the car is not running. are you experiencing any steering issues at the same time? check your fluid levels (PS fluid will effect operation) and all the associated hoses and lines, go from there. good luck!

I had a problem with vacuum in my F250 diesel. It had a new vacuum pump but would kick out of cruise control every time the vacuum pressure dropped. It turned out to be the vacuum reserve cannister had holes in it.

Seems you reach a tipping point and then all the vacuum systems mess up. You might want to check the reserve cannister and any vacuum servo your 4x4 might have. You can check most of the vacuum stuff with the engine OFF using a vacuum pump. You could have a leaking vacuum pot operating the ductwork. Check your diesel vacuum pump for output and loose belts.

turn ignition to on and see if it you can hear the fuel pump.
if yes check for blocked line/filter or leak somewhere
if no hard wire fuel pump and see if car starts.
if yes then your not getting power to your fuel pump, probably due to immobiliser but possibly due to faulty wiring.
if no then replace fuel pump.