I have an opportunity to buy a 1999 Ford Ranger with a 3.0L Flex Fuel engine which is bad. I will be looking around the junkyard for a replacement engine. Is there anything on this engine that will identify it as a Flex Fuel engine. From what I understand putting a standard Gas engine in the truck presents many other problems such as the computer and wiring harness. Is this true.

the junkyard i go to leaves engines in cars...

The differences between a 3.0L FFV and 3.0L regular gasoline engine lie in the fuel delivery system and PCM operating strategy, both of which are not part of the base engine itself. So as long as you use the original (larger) fuel injectors from the FFV engine, you should be good to go with a regular gasoline 3.0L donee engine.

You should read this. be sure to catch the part about heads
http://www.babcox.com/editorial/ar/eb90450.htm
plus all fuel rail parts need to be made of stainless

You should read this. be sure to catch the part about heads
http://www.babcox.com/editorial/ar/eb90450.htm
plus all fuel rail parts need to be made of stainless

Good link. I never knew there was so many subtle differences in this engine. A local shop put a Taurus 3.0 in a ranger. It always had heating problems. Looks like the differences in the head gaskets may be the culprit.

.
.

J