348 worried about 1-4 light

Cant help ya with your problem sorry mate,but wondering,did someone fit the radar dector into the dash of the car? Does it look like a good/factory fit? Or it looks like it shouldnt be there! Did you do it or buy it like that?? Just curious LOL Cheers
Sound like a good idea thats all!

 

Cool,thanks for that! They done a good job of it!

 

Do a search on "348 warning light ECU" (and read your OM!). You'll get 12 threads that will have a lot of useful information (including photos/diagrams) on this subject from the 348 brotherhood.

The thermocouples (there's one for each bank) are mounted so that their tips (the active part) are in the exhaust streams exiting the catalytic converters.

 

Back to the original topic. The slow down lights only show that the catalytic converter temperature is high. The temp ECUs are located on the outside of the rear suspension uprights and are prone to failure and bad electrical connections. If you do a search on this site you will find many postings with dnswers to your problem. If you have removed the converters, just disconnect the ECUs. If the excessive temp is reported, your Engine ECU will shut down that bank of cylinders eventually. If an ECU is bad and shuts down a bank of cylinders, shutting off the engine and restarting will clear the problem temporally. You can test the ECUs by switching them side to side and see if the slow down light changes to 5-8.

 

The first thing that you want to do is determine if you have a real problem or a simple circuit glitch.

Your 2 exhaust ECU's are on your car to prevent cat fires. If they detect a hot cat, then they flash your Slow Down light for their respective side.

A bad spark plug, a bad spark plug wire, a bad coil, or an A/F mixture (among other things) could be putting too much raw fuel into a cat...which is a bad thing...

...that heats up a cat and triggers the warning (when the exhaust ECU is correctly working).

Of course, the system is also known for false alarms. The posters above were suggesting that you swap your two exhaust ECU's with each other.

This is a good test because if the exhaust ECU itself is faulty, then your slow down warning light will switch sides.

On the other hand, if both xECU's tell you that the same side cat is hot, then you've got to do some real trouble-shooting to find out why too much fuel is being dumped...

...which you would **really** want to know no matter whether you replace your cats with Hyper-Flows or hollow "test pipes."

More here: http://webpages.charter.net/aircover/348/1994Ferrari348Spider.html#SlowDownLights

 

You'll get 4114 if you check your ECU codes with the engine off instead of while running.

The list of 348 ECU Codes are here: http://webpages.charter.net/aircover/348/1994Ferrari348Spider.html#ECUcodes

 

Do you have any pics of the dash with the radar installed?

 

Slow Down lights are VERY VERY important to monitor.....Heated cats CAN cause a 348 to burn up...

Swap the ECU's as suggested and see if the problem is the ECU's are faulting or if you do have a cat that is getting too hot....

Another thing, if your cat is THAT hot that it is triggering the thermocoupler sensor, you can always pull over the car immediately and get under and look at it. I have heard that your cats should be 'glowing' if they are getting that hot.

Another note, if your cats are overheating, it is because you have another problem with your car...It is a reaction, typically from one of the problems that NoDoubt listed...

Test pipes will solve the problem of having your car not go up into flames, because the raw fuel that is being tossed into the cat that is making such a fiery ignition, will now just pass through your whole system...thus no fire... but it will not solve the problem of why your car is throwing excess raw fuel into your exhaust system.

If your ECU's are faulting....try some contact cleaner (stabliant 22a) and clean the electrical contacts on the ECU's...A lot of problems that you will find on these cars is due to bad connections through faulty grounds, electrical contact corrosion, or some other kind of electrical fault....Contact cleaner is an amazing fix for a lot of things... I would recommend cleaning contacts on a lot of your electrical components such as MAFs, ECUs, plug wires and it will also solve the E8 problem as well as the fan kicking on and off on the HVAC units...

I am not a mechanic, but I did stay at a Holiday Inn.

BTW, curious about your turbo...did you buy it installed or have it installed... How many horsies are you pulling...any problems....constant tune ups on it?