We've got a puzzle - 1986 Bronco II --- UPDATE
This is not about our RV tow vehicle, but it actually does tow a utility trailer once in a while....
We've got a 1986 Bronco II that is missing badly and we don't know what is wrong. If anyone has any ideas, we're all ears.
It has a 2.9 liter engine with electronic fuel injection and a rudimentary computer (not like today's vehicles).
It sat most of the winter (we don't drive it in the snow and salt).
Our first use of it this spring it ran really rough - engine shaking, exhaust coming out in stinky puffs. But then it cleared up and we took it to Lowes to pick up some lumber in our trailer. All the while it was running perfectly fine.
A couple of weeks later... We started it up and it ran really rough again. This time it did not clear up and actually conked on the side of the road and then wouldn't start. I know - I shouldn't have taken it out of the driveway, but I was 90% sure it would clear up like last time. Checking the oil dipstick - we smelled gas.
We had it towed to our local garage and asked them to diagnose it. They told us the fuel pressure was good and they think that it was condensation in the distributor cap and to do a complete tune up - as the plugs were totally fouled. Oh - and then the mechanic mentioned that it might just be the ACT (Air Charge Temperature) sensor that was giving a wrong reading causing a big fuel feed (like an automatic choke).
Anyway - we did the tune up and it still ran rough. We replaced the ACT sensor and it still runs rough. At least it starts right up with the new clean plugs! But we don't want to run it long and foul up the new plugs.
So... What could be wrong - it cleared itself up once and now it won't. Any ideas?
We've got a 1986 Bronco II that is missing badly and we don't know what is wrong. If anyone has any ideas, we're all ears.
It has a 2.9 liter engine with electronic fuel injection and a rudimentary computer (not like today's vehicles).
It sat most of the winter (we don't drive it in the snow and salt).
Our first use of it this spring it ran really rough - engine shaking, exhaust coming out in stinky puffs. But then it cleared up and we took it to Lowes to pick up some lumber in our trailer. All the while it was running perfectly fine.
A couple of weeks later... We started it up and it ran really rough again. This time it did not clear up and actually conked on the side of the road and then wouldn't start. I know - I shouldn't have taken it out of the driveway, but I was 90% sure it would clear up like last time. Checking the oil dipstick - we smelled gas.
We had it towed to our local garage and asked them to diagnose it. They told us the fuel pressure was good and they think that it was condensation in the distributor cap and to do a complete tune up - as the plugs were totally fouled. Oh - and then the mechanic mentioned that it might just be the ACT (Air Charge Temperature) sensor that was giving a wrong reading causing a big fuel feed (like an automatic choke).
Anyway - we did the tune up and it still ran rough. We replaced the ACT sensor and it still runs rough. At least it starts right up with the new clean plugs! But we don't want to run it long and foul up the new plugs.
So... What could be wrong - it cleared itself up once and now it won't. Any ideas?
