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Discussion Starter · #1 ·
I recentlt bought a '95 Disco with 164K Miles and I have a few questions regarding my new vehicle.

1. When I park the truck hot and go run an errand or something it usually is reluctant to start when I return and if it does it runs roughly until I'm under way where is smooths out shortly there after. A mechanic friend said it might be the temp sensor on the intake manifold is faulty or has a bad connection. Connection seems OK. Is there a test for the sensor? (My manual is in the mail as I write).

Is there a aftermarket code reader available that I could use to help diagnose my hot starting problem or is there someone in the LA area that could help me out???


Does anyoner have any other suggestions?

2. There is a noticable amount of slop in the driveline and I was woundering if there was a way to adjust this out or if I just get to wait until some part of the driveline fails from wear and tear and then replace it. The tranny also clunks when I put it into reverse and my friend said this was to be expected considering the miles and said not to worry about it. Yes??? No????

Any and all sugggestions appriciated.


Did you know that Lucas is the name of Daffy Duck in Latin America


Thanks

Eric
[email protected]

'95 Disovery
'62 Sunbeam Alpine SerII
 

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Eric,
You might want to look for the codes under the front passanger seat. If there is one stored you will see it as a number on one of the relay size boxes.
As for the problem you are having, may be the fuel pump bleeding down pressure also.
Good luck
Mike
 

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Discussion Starter · #3 ·
Code ??????

So I looked at it from the back and it either says hI or 14 depending on whether its upside down or not.

I hope this code doesn't mean: Failure Imminant.

Any Ideas???



Thanks

Eric


Any thoughts on the drive line slpo by the way??

Sorry to pick your brain so much. My shop manual is in the mails afterall.
 

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Discoveries have a digital readout for diagnostics located under the passenger seat facing backwards. It is a small black plastic box with a red LED. It may be unclipped from under the seat so you can see it.

These fault codes are given in order of priority so if more than fault exists, you will have to clear the display before the next fault code can be displayed.

NOTE: Fault code 02 means that the ECU has just been reconnected. Switch on the ignition to clear the display. Then disconnect serial link mating plug, wait 5 seconds, then reconnect. Then switch the ignition off and wait for the main relay to drop out. Next switch the ignition on again. After these steps the display should now be reset. If there are other faults, the next one will be displayed. Otherwise the display will be blank.

These are the codes in numerical order.
Code 12 - Airflow meter :: refer to test 19, continuity test procedure.

Code 14 - Coolant thermistor :: refer to test 14, continuity test procedure.

Code 17 - Throttle potentiometer :: refer to test 17, continuity test procedure.


Code 18 - Throttle potentiometer input high/airflow meter low :: refer to tests 17, 18, and 19 of the continuity test procedure.

Code 19 - Throttle potentiometer input low/airflow meter high :: refer to tests 17, 18, and 19 of the continuity test procedure.

Code 21 - fuel tune select :: Identifies that the tune select resistor is open circuit- refer to tune select resistor test.
Code 23 - Fuel supply :: check fuel system pressure, test 20 of continuity test procedure.

Code 25 - Ignition misfire This code indicates that an ignition system misfire has been detected. Codes 40 or 50 indicate on which bank the misfire has occurred.
Code 28 - Air leak

check for air leaks in the following areas:
o Hose, air flow meter to plenum
o Breather system hoses to plenum
o Brake servo hose
o Vacuum reservoir hose (fresh air solenoid)
o Distributor vacuum advance
o Hose, purge valce to plenum
o Injector seals
o Joint - bypass air valve to plenum plenum chamber to ram housing ram housing to inlet manifold inlet manifold to cylinder head bypass air valve hose

Code 29 - ECU memory check If detected all other faults are unreliable and must be ignored.
Procedure:

1. leave battery connected
2. switch ignition off
3. wait for approximately 5 seconds
4. disconnect ECU plug.
5. reconnect ECU plug
6. switch ignition on and check display unit. If fault code 29 is detected again, swap out the ECU for another one and retest.

If fault code 29 is detected again, swap out the ECU for another one and retest.

Code 34 - Injector bank A The display will indicate if the injector(s) are causing the engine to run rich or lean.

If the bank is running rich, check for - faulty injector wiring and connectors, stuck open injectors.

If the bank is running lean, check for - faulty injector wiring and connectors, blocked injectors.

Code 36 - Injector bank B As code 34, except relevant to bank A injectors.
Code 44 - Lambda sensor A - left bank
Code 45 - Lambda sensor B - right bank

If one of these fault codes is displayed check the wiring to that particular lambda sensor.

If both codes are displayed, the voltage supply to the heater coils of the sensors must be checked. Refer to test 26, continuity test procedure.

Code 40 - Misfire bank A - left bank
Code 50 - Misfire bank B - right bank

If both codes are displayed, check the following components common to both banks:
Distributor cap
Rotor arm
Coil
Electrical connectioins
Pick-up (air gap)
Amplifier
Injectors (if code 34 or 36 is displayed)
If either fault code 40 or 50 is displayed check components applicable to the particular bank that the misfire has occurred on.
Spark plugs
HT leads
Distributor cap
Injectors - if code 34 bank A or 36 bank B displayed

Code 48 - Stepper motor check base idle speed- see setting procedure. Refer to tests 15 and 16 of continuity test procedure. Check road speed sensor- refer to test 25 of continuty test procedure.
Code 58 - Group faults 23/28 This indicates that a fault has been registered that is caused by the fuel spply or an air leak but the exact fault cannot be identified. Check all items outlined under codes 23 and 28. Code 59 Fuel thermistor Refer to test 13 of the continuity test procedure.

Code 88 - Purge valve leak refer to test 9 and 10 of the continuity test procedure.

Code 68 - Road speed sensor refer to test 25 of continuity test procedure.

Code 69 - Gearswitch refer to test 24 of continuity test procedure.
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1997 Land Rover Discovery
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This shouldn't be a big problem for you.
Mike J.
 

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Discussion Starter · #6 ·
Disco Tech question

I get a 14 on the display as well as a check engine light and I wanted to make sure I hadn't triggered this when I disconnected the lead to the temp sensor on the intake manifold.

Which is the serial plug that I need to disconnect to reset everything so I can double check my problem is in fact commiong from a faulty temp sensor?

Sorry to keep picking your brain. Manual is on it's way!!


Thanks

Eric
 

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My two cents in....

62sunbeam said:
I recentlt bought a '95 Disco with 164K Miles and I have a few questions regarding my new vehicle.

1. When I park the truck hot and go run an errand or something it usually is reluctant to start when I return and if it does it runs roughly until I'm under way where is smooths out shortly there after. A mechanic friend said it might be the temp sensor on the intake manifold is faulty or has a bad connection. Connection seems OK. Is there a test for the sensor? (My manual is in the mail as I write).
Check the lambda oxygen sensors on the exhaust manifold. There are two. Either one is bad or the electrical connections are getting flakey.

I have the problem but now it is cold and they are not acting up. I am waiting until it gets warm enough to fix the problem.
 

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Discussion Starter · #8 ·
Sensors

Funny thing you bring that up.

I originally got a 14 error code and so I bought a temp sensor for the intake.

Before I could replace it I started to get a 45 error code.

I'm going to replace the temp sensor as I think it might have been making the Disco run excessively rich when hot and that it may have contaminated the O2 sensor.

If after a while that doesn't work I'll replace the right hand O2 sensor although I believe it's new.

Cross your fingers.


Thanks

Eric
 

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164,000 miles... get ready to start looking at injectors. Do some research... on this for yourself if you like... I am looking at replacing the Lucus injectors with Bosch. Another Rover owner swapped his Lucus out for Bosch/ Ford 19 lb yellow top injectors (Used in 97 and later Ford F150 4.6/5.4). He said the old girl fires up with the slightest bump of the ignition... and runs smooth! I am ordering the injectors myself... certainly I will add any addition updates once the project is finished.


As for the ODB reader... you can pick one up for a fair price at Northen Tools. I would not worry to much about having Land Rover Specific definitions since the codes are listed commonly on the net.

Your OBD connection is under the dash on the drives side. With a simple 170.00 dollar investment you can obtain a OBD reader that will read OBD II Generic codes. You will be able to clear that MIL as well. FYI
 

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texasrover said:
As for the ODB reader... you can pick one up for a fair price at Northen Tools. I would not worry to much about having Land Rover Specific definitions since the codes are listed commonly on the net.

Your OBD connection is under the dash on the drives side. With a simple 170.00 dollar investment you can obtain a OBD reader that will read OBD II Generic codes. You will be able to clear that MIL as well. FYI
Actually since it's a pre '96 it is not odbII compliant and codes are read off the unit under the passenger seat. If you want an analyzer of some sort you'll have to get the LR specific one.
take care
sam
 
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