86-B-II 2.9 efi

[MONTANA]

I own an 86 B-II 2.9 efi, cool it runs well, but after it warms it acts like it is running out of fuel...eventually it dies and re-starts after awhile.

I re-routed the fuel line away from the manifold (vaporlock) and did seem to get some relief, now it runs fine under throttle, but at idle it acts like it is running out of fuel...smoothes out with a little throttle.....Fuel pump? HELP!

[vabronconut]

I own an 86 B-II 2.9 efi, cool it runs well, but after it warms it acts like it is running out of fuel...eventually it dies and re-starts after awhile.

I re-routed the fuel line away from the manifold (vaporlock) and did seem to get some relief, now it runs fine under throttle, but at idle it acts like it is running out of fuel...smoothes out with a little throttle.....Fuel pump? HELP!

two quick things, is the tank low pressure pump working? and have you tried a fuel filter?

[CBlue]

I had this happen random for over a year and a half. 86 BII.

Always check the fuel pressure at rail. If your pressure is around 40 psi, your good for fuel.

Here was my fix. Took alot of time and money before I found the easy fix.

The TFI module on back of distributor is failing due to heat conduction from distributor.

I changed out multiple modules, yet still died at random times.

Here is the fix.
1. Pull off the module from back of distributor.
2. Go to radio shack and get two small heat sinks.. Cost about 50 cents each.
3. Mount the module to the fire wall using the heat sinks as spacers between. Apply the gel to get best conduction to the heat sinks. Air will pass around the module and heat sinks to reject the heat causing the module to fail.
4. The wiring... Make up extension wires with spade (male and female) ends to connect back to engine. I used larger spade connectors (female) and ground down the male ends to match size. You may find the correct ones available.

I never had a problem again, yet when ever I do have questions about TFI failures, It only takes a second to swap in the spare I keep in the tool bag.

Several mechanics had mentioned that the Taurus had a recall back in the 80's, which was corrected with this method. No kits were available, but this is easy to make as described.

Good Luck.

[campcreekkennel]

yes there is a recall on the 2.9 for the module and how was your B2 actin up before the heat sinks?

[CBlue]

Before relocating module to firewall...

The truck ran great, then would just die. Sometimes it would run for hours before failure, other times within 15 minutes of driving. No difference in the winter (cold season) or Summer (very hot). Sometimes the truck would start within an hour.. other times a day.

I would take it to mechanics and they would all say the same thing. "Can't get it to fail" to identify the problem.

I previously changed all pumps, relays, coil, distributor....

The module on the back of the distributor was a lousy design. This is an easy & cheap mod to fix. Alot of people post similar simptons, Again, moving it also makes it easy to change modules if they fail on there own. I keep a spare, just to swap out. A fleet mechanic for a large series of Ford trucks first told me about the common failure. It was another mechanic that told me about the Taurus recall years back that relocated the module away from the distributor.

If needed I can create some photos to show how to.

[campcreekkennel]

Thank you for that. Im yet to try it on my 88 but i am going to in a few days. I can figure it out from your descrition, whitch i very well. thank you once again.

[MrD]

I like pics