'90 5.0 Engine slows to a stop

Check your fuel pressure .... it should be somewhere between 30-40

If the needle dropped to the peg but the engine was still turning at reasonable rpm... remove the TFI (Ignition Module), bet you find the grease on the back hard and caky... should be GREASY.

Alternative is the ign power from the switch, notorious in those years for failing.

ALL YOU GUYS OUT THERE WITH THE TFI SYSTEM ... IF YOU NEVER LOOKED AT IT, DO SO... RELUBE IT before it fails! That means take off the old, put on new.

Okay, where is the TFI? I've got the grease and the time...

Thx

Brad

On Thu, 30 Jun 2005 02:45:37 +0000, Brad and Mia rearranged some electrons to form:

Mounted on the distributor. The grease is thermal compound that allows heat to conduct from the module to the distributor body. It's not dielectric grease.

David M wrote in news:pan.2005.06.30.09.33.54.33181@sled351:

Dielectric grease works just fine.... as does plumbers silicone grease from Lowes, it's the temp rating that counts.

And the white grease for heat sinks always WAS called "dielectric grease" in the electronics industry.

On the 95 5.0 it is below the air intake on the passenger side firewall ...I think ... can someone confirm this ?

On Thu, 30 Jun 2005 12:04:41 +0000, Backyard Mechanic rearranged some electrons to form:

Not in the electronics industry that I work in. There is a distinct difference between thermal compound and dielectric grease. It's not the "temp rating" that matters, it's the thermal efficiency that matters. Thermal (heat sink) compound has a thermal conductivity higher than dielectric grease, usually greater than 1 watt/meter-K. The thermal conductivity of dielectric grease is normally not specified.

Check it for yourself:

We use them both in the equipment that we design, and they are most definitly not the same thing.

So, your idea here is that if I keep the heat sink compound fresh, my TFI modual won't go out like they are prone to do? I didn't think they were *that* sensative to heat, but that would account for all the sudden failures.

Not since I've been active in Electronics. It was always called heat sink compound or thermal conductive grease. Dielectric grease may be non-electrically conductive and still not conduct heat very well.

Which are, by the way; very hard to get to. You need a slim nut driver or slim deep socket. I bought a nice little tool made especially for that task from Late model restoration supply.

Just as a follow up for this thread that I started. I spent this morning replacing my fuel pump and filter and hopefully this solves the problem. I was able to isolate the problem by getting the car to stall when in a very hard corner with 1/4 tank full of gas and the car seemed to stop consistantly. So we'll see if the fuel pump/filter solves the problem. Of course, if not, I can always replace the TFI on the dstributer.

Thanks all!

-James