ranger wont start

[tomblakeney]

My 1992 Ranger 3.0 l automatic will not start after a rain. There is no tach signal, I have replaced and relocated the PCM with no result. Coil and tune up are within 500 km old. When there is no tach signal there is constant power to both sides of the coil... No switching power..If i swap out my PCM for one from an Aerostar it will start but runs terrible (diff firing??). Can anyone help????

 

[cbgaloot]

I am having a very similar problem.

At first it would not fire on cold wet mornings. Cranked just fine but no fire. Ran fine most other days.

Now it either won't start, or if it does it runs for maybe 5 seconds then dies.

I've cleaned every connection I can find. Had battery and alternator checked. Tried different coil. Plugs and Wires are relatively new.

Just at a loss for ideas.

 

[Tbars4]

...have you tried reading the codes??? checked the maf???

 

[tomblakeney]

No codes, airflow is clean and passes tap test...

 

[gt40]

probable coil pack.
the tend to crack underneath, and any moisture will preevent them from firing properly.

 

[robs05xlt]

Hi There:
A no tach signal usually means a distributor change (bad Pick-up coil inside distributor is not receiving the signal )Before you do that,if you can get the engine started try this: Take a windex bottle filled with water & lightly spray around all the ignition wires, coil, distributor, battery connections & the electrical connectors & relays.You have found the bad item when your engine starts to run roughor gets worse.When you find it cover the componet with duck tape as that stuff is water proof. Then see what happens next rain session. If you had this on the scanner tool & the code says that no tach signal is being received by the distributor pick up coil. Then you need to change the pick up coil.I remember pulling the distributor out of my 86 ranger 2.9 & replacing the pick up coil. Did not have to change the entire distributor.The engine would not start.Cost me about 15 dollars for the p/coil & about 1hr. of work.The month before I changed a bad ignition control module.(A pain to get at.)The truck was about 4yrs.old. But I also remember some trucks you had to change the whole distributor. I think those were toyota's
I hope this helps.
rob05xlt