stfree
New Member
- Joined
- Jan 19, 2013
- Messages
- 6
- Reaction score
- 0
- Points
- 1
- Location
- Costa Rica
- Vehicle Year
- 1990
- Make / Model
- Ford
- Engine Size
- 4.0
- Transmission
- Automatic
I am in trouble here. Last week my troubled A4LD finally bit the dust in my 1990 Ranger 4.0. Big time. Fluid all over the road. Lurched as if locked up, then free wheeled. But that was expected really. I've been wanting to convert it to a manual and I've just now managed to find a donor tranny so good, right? Not really. In the course of destroying itself, the A4LD seems to have involved the engine too. It cranks.. fast, but no start. Fuel is present at the injectors, there is spark, there is valve train continuity (micro camera inspection inside the valve covers), the plugs all look good and the pistons all go up and down (by micro camera verification) as advertised. But zero compression on ALL SIX. In fact, it blows OUT the throttle body rather than sucks now. The only thing I can figure is that it has jumped time when the tranny momentarily locked up in such a fashion that no cylinder can build compression. I'm told that this is a non-interference engine so I'm not thinking a bunch of trashed valves. Anyone want to speculate with me about the timing being the problem? I've got a timing chain kit coming and I'll get into it in a day or so. Thanks.