Mondial T gauge cluster

Hello all, in my effort to rehabilitate this neglected horse, I am trying to get the motor running well. The car in question is a 1989 Mondial T 3.4. This set up has dual motronics, and appears to act as 2 four cylinder motors tied to a common crank. Almost everything is redundant in regards to the fuel and ignition system.

I suspect that someone at some point ( car sat for 10+ years) removed the "check engine" bulbs. I don't know for sure, but according to the manual I found on line, there is a check engine bank 1-4, a slow down 1-4, and all the same for 5-8 bank. So there should be 4 bulbs altogether showing the motronic condition.

When I turn on the key, with engine off, no check engine lights illuminate at all. This leads me to believe the bulbs have been removed. I doubt they all burned out. I realize that this is an early fuel injection system, before OBD2, but there should be some diagnostic indicator.

At any rate, this leads me to the question, How do I remove the gauge cluster assembly. I do not see any screws visible and I don't want to tug on anything without knowing what is needed. I really need a full service manual ( which I thought I purchased on flea bay, but it turned out to be some data, but not all).

If anyone can help with this, I offer many thanks. Yes, I did try to search with no luck.

Thank you and Happy Fathers Day!!!!!!

Rich

 

Thank you Alden, and thank you everyone. Even though the dash is different than my T, I think the speedo and tach bezel will pull of as described.

However, I am receiving conflicting information regarding the CEL. My copy of the user manual ( from questionable source on flea bay) clearly shows

Check Engine bank 1-4
Check Engine bank 5-8
Slow down bank 1-4
Slow down bank 5-8

That being said, people who have Motronic series 2.5 state there is no CEL

I am not certain if my Motronic is series 2.5 or 2.7..

I need to do more research. If I have 2.5, then I guess I have no CEL to worry about.

I am unable to find anything that appears to be a data link, and my service book shows the use of a "break out box" as the diagnostic tool. For those unfamiliar, a break out box is basically a complex jumper lead series, that plugs in between the motronic harness and the actual motronic box. It has a lead for each wire involved, and allows measurement of sensor input/output as it is actually occurring. Yes this is an archaic method, and OBD2 has made quick work of this, but unfortunately, this is what I have to work with.

I will post my findings as I go along.

I appreciate any and all input

Kind regards

Rich

 

After doing more research, it appears that the manual I have covers Motronic 2.5 AND 2.7

I still do not know for certain which version I have, but I do know that my car has catalytic converters, and my car also has the temp sensors that are in the cats, along with a seperate "black box" for each cat sensor....

This is making me think I may have version 2.7.. I will look directly at the Motronic boxes and write down any numbers that I can find. Perhaps this will help me find a absolute answer as to whether or not I should have a CEL

Again, thank you

Rich

 

Thank you all, So it now appears, that according to my new knowledge that I have the Motronic 2.5 as I only have one TPS.

Along with this info, I now believe that my car has no provision for a CEL, which will leave me to guess that everything is OK.

If it runs well, all is well? I see that the owners manual shows a break out box, used to diagnose the system, and in my flea bay purchased CD service manual, there is a flow chart to use to diagnose.

After a 10 year slumber, and 3 months of preparation, including new fuel pumps, timing belt, fuel filters and so on, the motor is starting to run well.

I may change the plugs and wires as a precautionary measure, although, no miss is present at idle. I have not tested it under a load or stressed. That will come.

In the end, I don't need to remove the gauges to gain access to lights ( that are not there)

I would prefer having a CEL.

As a fun note, in the Porsche world, people seem to prefer the early 993 model which has a less finicky CEL. The early 95 and earlier cars use OBD1 ( which is a step up from what I currently have) and it is useful, especially when doing modifications to the motor.


Thank you all for your help

Rich