Boingo
New Member
- Joined
- Aug 31, 2015
- Messages
- 12
- Reaction score
- 1
- Points
- 3
- Vehicle Year
- 1986
- Make / Model
- Ford
- Transmission
- Automatic
SO, I'll give all the details. You decide what is relevant.
My guess is a bad cam lobes and/or lifters.
1986 Ford Ranger 2.9 xlt auto 2wd.
The motor was rebuilt by a very reliable guy we know. It was a family member's truck, then i got it years later. It sat in this truck for 5 years without ever being attempted to run. Lots of circumstances why that happened and not really relevant. It was completely installed and sealed with typical external components.
I had a hard time getting it to fire up. It ran off balance so I thought maybe the wires were 180 off. It took many time turning it over at first to fire.
Now, everything is new, map, injectors, distributor electronics, plugs wires & coil, egr, IAC, have tried two ECMs, grounds are good, fuel regulator, pump/float in tank, new tank...other was rusty, fuel pump on rail, new filters, ....you get the point.
Truck fires right up and runs now. Runs slightly rough like a mis, rev up still slight mis
Vacuum at 17, drops at rev then levels back up and stays solid. Figure no leaks and not a plugged cat
Compression all within a couple numbers around 175
All plugs getting spark
Fuel pressure good and level
Added oil, temp gauge both showing good
Now the rub, In the beginning I found that two push rods had bent on the 4 & 5 intake valves. Had to tap both since the valves were stuck. Not much of a tap. Guess sitting was the issue.
Replaced the push rods.
My best guess is due to the hard starting at the beginning and not getting it revved immediating to 2k+ to break in the cam and get it lubed did damage. Not to mention the bent rods
My guess is the corresponding lifters and lobes were damaged and that is my rough idle
Now i need to replace the cam & lifters and go for the correct break in procedure.
Sorry about the length. I would appreciate any thoughts or confirmation replacing the cam/lifters in most likely the next step.
This is an extra vehicle and why I'm not totally freaking out about all this, annoying as it is...lol
My guess is a bad cam lobes and/or lifters.
1986 Ford Ranger 2.9 xlt auto 2wd.
The motor was rebuilt by a very reliable guy we know. It was a family member's truck, then i got it years later. It sat in this truck for 5 years without ever being attempted to run. Lots of circumstances why that happened and not really relevant. It was completely installed and sealed with typical external components.
I had a hard time getting it to fire up. It ran off balance so I thought maybe the wires were 180 off. It took many time turning it over at first to fire.
Now, everything is new, map, injectors, distributor electronics, plugs wires & coil, egr, IAC, have tried two ECMs, grounds are good, fuel regulator, pump/float in tank, new tank...other was rusty, fuel pump on rail, new filters, ....you get the point.
Truck fires right up and runs now. Runs slightly rough like a mis, rev up still slight mis
Vacuum at 17, drops at rev then levels back up and stays solid. Figure no leaks and not a plugged cat
Compression all within a couple numbers around 175
All plugs getting spark
Fuel pressure good and level
Added oil, temp gauge both showing good
Now the rub, In the beginning I found that two push rods had bent on the 4 & 5 intake valves. Had to tap both since the valves were stuck. Not much of a tap. Guess sitting was the issue.
Replaced the push rods.
My best guess is due to the hard starting at the beginning and not getting it revved immediating to 2k+ to break in the cam and get it lubed did damage. Not to mention the bent rods
My guess is the corresponding lifters and lobes were damaged and that is my rough idle
Now i need to replace the cam & lifters and go for the correct break in procedure.
Sorry about the length. I would appreciate any thoughts or confirmation replacing the cam/lifters in most likely the next step.
This is an extra vehicle and why I'm not totally freaking out about all this, annoying as it is...lol