engine cut out

Most problems are either spark or fuel. So what is the specific symptom? Does the car just die like the power was shut off, or does it cough, sputter and poop out? I'd bet it's a fuel filter issue since that is the majority of causes of high rpm cut off. Or it might be a dying fuel pump.

Have you looked into the fuel system recently?

On the spark side, all I can suggest is the possibility of a short or loose connection that severs current somehow at high demand.

 

Check the battery cables. My '92 ts did exactly that, when one of the battery cables was loose.

CMJ

 

+1

Possibly worn engine/gearbox mounts causing the motor/gearbox to move under load?

Seen this on alot of other cars thats all

 

Maybe even be a notorious 'bad earth' issue that 348's can also be reknowned for. Check earth points and would even pay to add another earth from battery to engine cradle.

 

Check the condition of the connections to the Mass Air Flow Sensor, O2 sensors, coil packs, crank sensors, and cam sensor. Make sure that they are clean and connected properly. Check to make sure that there are not broken wires.

Then you will want to check the condition of your spark plug wires/plugs.

Finally did you get any check engine lights? If you did you should pull the codes to see what triggered the light. Maybe even pull the codes anyway.

 

Check the condition of the connection for the MAFS, and the crank sensors.

 

Fuel, fuel, fuel.

 

Possible failure of a fuel pressure regulator?
Where are you? Recommend you subscribe. There's probably a brother near you. Sometimes it's easy to diagnose by swapping parts off another car til it goes away. This problem is likely a simple fuel supply problem, but very hard to diagnose without being there.

 

I remind you of Occam's razor which is often paraphrased as "All things being equal, the simplest solution tends to be the best one."

Therefore, I would start with a fuel filter, move to fuel pressure regulator and fuel pump before looking for more complex causes. Not that they are any less valid suggestions, but start with "Oc".

 

GUESS??!!

Cummon man, join up. You don't know what your missin. The 348 Brotherhood watches out for each other. Since you own a 348 your already in the Brotherhood. But be for warned, this doggon sight Rob created IS VERY addicting.

 

I too am an SJ local. I used to work for Los Gatos Ferrari back in 1999. Shoot me an e-mail and lets check it out. Definately sounds like spark, or fuel. I just bought a 348 that needs a rebuild after a T-belt break if you want to see the nitty gritty.

Mark
[email protected]

 

You bought TMobilguy's car, didn't you? Did he give you my head bolt tool with the car? I sent it to him to use and haven't gotten it back.....

 

How many miles were on it when the Belt let loose. Im currious what the cause of the belt breaking was.

 

Hard accel. causes a couple of things to happen. 1) As the load increases spark has to overcome a larger resistance that is the result of higher cylinder pressures, increased fuel charge, hotter temps (2500F +), and a shorter amount of time for the secondary ign. coil satturation. 2) Fuel pressure must be par for the regulators to dump fuel when, and if they see the lack of vac. signal. 3) Chasis grounds must be in good shape to handle the increase in system current. 4) Critical sensors must be able to respond with higher accuracy. Does the car chug-a-lug like a rev limit or does it bog down? 5) Exhaust system must be free from pressure drops. Are any lights illuminted on the cluster? I love this stuff, and used to make a living at it before moving into the semiconductor industry. Did you replace the plug extenders they are suspect?

 

Yeah I bought tmobileguys 348. I am awaiting delivery, so I dont have the head bolt tool, and don't expect to recieve it. I will ask him about it. As far as I understand it a tensioner bearring let go.

 

Now see, that just isn't right. You lend out a tool to a fellow brother in need and he doesn't give it back. Cummon TMobile send Plugs his tool back.

 

It is electrical and hard to find. After you physically check everything twice if you give up just have FNA put an SD2 on it for 75 bucks and get the diagnosis. It will not be totally right but it will get you in the reight circuit branch. I bet you feel the problem at 5000rpm but it is coming in beofre that most likely and the SD will find it. Or you could plug a digitch generic tool in there or sometime just a sun smog machine will isolate problem areas.

 

Good point! A quick scan generally points you in the right direction. I have built my own scan tools for other cars and look forward to tinkering with the 348 electronics!

 

Catalytic converter

 

Do you know of a generic tool that will hook up with the early motronic system? I don't think it can be done with an OBDII reader.

I have a Snap-On MT-2500 scanner and have been trying to find an adapter and cartridge but no luck so far.

 

No I have not been going to any events. Who, what, where when?