I know that the computer controls the timing on this engine and i haveheard before that turning the distributor will not have any effect on thetiming.I have installed the dist at tdc all plugs are correct and thejeep runs very well just curious as to why when I turn the dist. Theengine will die or bog out. I thought that the comp controlled this.Does the position of the dist matter?
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Your timing is locked. (distributor is installed with no adjustment feature... on 02's you may not even have a distributor as it's replaced by the cam sensor) All timing and fuel mixture is controlled by the engine computer. Main inputs to the computer that influence changes are the throttle position sensor and MAP sensor but all sensor inputs are evaluated.
1. Set parking brake. Shift automatic transmission to Park or manual transmission to Neutral. With A/C off, start engine and attain normal operating temperature.
2. With ignition OFF, connect an ignition timing light and a calibrated, expanded-scale tachometer.
3. Disconnect 4 " and 10 " Hg (CEC System) vacuum switch assembly wire connector (located at top of valve cover). Disconnect and plug distributor vacuum advance hose.
4. Start engine, increase engine speed to 1600 RPM and check ignition timing. Adjust timing to specification listed on Emission Control Information label (if necessary). Tighten distributor hold-down clamp and recheck ignition timing.
5. Turn engine off and remove timing light and tachometer. Connect No. 1 spark plug lead, if disconnected. Unplug and connect distributor vacuum advance hose. Connect vacuum switch assembly wire connector.
NOTE: If timing light has an adjustable advance control feature, turn control to OFF position.
straight six engine ,153624 firing order i know no2 and no4 leads have a sort of loop on the jeep engine and i should imagine this is the same on this model ,if you dont know where no one is then remove the rocker cover and turn engine over till the valves on no1 are closed and remove the plug to make sure piston is at top ,then you have the position on the distributor cap where no1 is ,lift cap and see where the rotor arm points too ,then this is no1 .then clockwise rotation the next hole is no5 and so on
To avoid confusion, tag and remove the spark plug wires one at a time, for replacement. If a distributor is not keyed for installation with only one
orientation, it could have been removed previously and rewired. The
resultant wiring would hold the correct firing order, but could change
the relative placement of the plug towers in relation to the engine.
For this reason it is imperative that you label all wires before
disconnecting any of them. Also, before removal, compare the current
wiring with the accompanying illustrations. If the current wiring does
not match, make notes to reflect how your engine is wired.
Fig. 1: The firing order can usually be found cast onto the intake manifold
Replace each wire individually from plug to distributor one at a time and they will be in the right order. Or make yourself a diagram before you start, very carefully marking the first one you take off the distributor and where it came from and where it goes. Hope this helps..
2.5L Engine 1987-90 VEHICLES See Figures 1, 2, 3 and 4
Fig. 1: Exploded view of the distributor-1987-90 2.5L engine
Fig. 2: Positioning the oil pump shaft for distributor installation-1987-90 2.5L engine
Fig. 3: Positioning the distributor rotor and shaft for installation-1987-90 2.5L engine
Fig. 4: Rotor position with the distributor properly installed-1987-90 2.5L engine
Disconnect the negative battery cable.
Remove the primary lead from the terminal post at the side of the distributor.
The wire connector will contain a special conductive grease. Do not
remove it. The same grease will also be found on the metal parts of the
Disconnect the vacuum line if there is one.
Remove the two distributor cap retaining hooks or screws and remove the distributor cap.
Note the position of the rotor in relation to the base. Scribe a
mark on the base of the distributor and on the engine block to
facilitate reinstallation. Align the marks with the direction the metal
tip of the rotor is pointing.
Remove the bolt that holds the distributor to the engine.
Lift the distributor assembly from the engine.
To install, if engine was not disturbed:
Insert the distributor shaft and assembly into the engine. Line
up the mark on the distributor and the one on the engine with the metal
tip of the rotor. Make sure that the vacuum advance diaphragm is
pointed in the same direction as it was pointed originally. This will
be done automatically if the marks on the engine and the distributor
are line up with the rotor.
Install the distributor hold-down bolt and clamp. Leave the screw
loose enough so that you can move the distributor with heavy hand
Connect the primary wire to the distributor side of the coil.
Install the distributor cap on the distributor housing. Secure the
distributor cap with the spring clips or the screw type retainers,
whichever is used.
Install the spark plug wires. Make sure that the wires are
pressed all of the way into the top of the distributor cap and firmly
onto the spark plugs.
If the engine was turned while the distributor was removed, or
if the marks were not drawn, it will be necessary to initially time the
engine. Follow the procedure below. To install, if engine was disturbed:
Rotate the engine until the No.1 piston is at TDC compression.
Using a flat bladed screwdriver, in the distributor hole, rotate
the oil pump gear so that the slot in the oil pump shaft is slightly
past the 3:00 o'clock position, relative to the length of the engine
With the distributor cap removed, install the distributor with
the rotor at the 5:00 o'clock position, relative to the oil pump gear
shaft slot. When the distributor is completely in place, the rotor
should be at the 6:00 o'clock position. If not, remove the distributor
and perform the entire procedure again.
Tighten the lockbolt.
Remember rated this post; I hope help you with this.
if you overhauled the engine and replaced the timing chain & gears, as long as you installed them properly and have installed the ign wires in the right places, the distributor is "locked in place" and is non adjustable (unless you are me, but that's another story) Computer makes all timing changes.