Cedar
Member
- Joined
- November 2, 2010
- Messages
- 29
- Reaction score
- 0
- City, State
- Portland, OR
- Year, Model & Trim Level
- '94 XLT
I got busy and let the truck sit for a week with the battery disconnected after trying to track down an intermittent wire or relay. When I went to start it the first time this week the engine started awfully rough and sounded terrible. Only thing I did different was I forgot the crankcase breather tube. l got that reconnected and now what used to be a subtle tapping sound I thought I'd heard intermittently while driving sounds like an awful loud knock or rapping. I'm posting a video mainly for the audio.
I'm really hoping someone's going to say check vacuum lines or some sensor or to let the PCM relearn, but I've never heard this sound before after working on the truck. Sounds kinda like a 25hp diesel tractor. Weird thing I thought I heard a fainter sound like this more since I got my truck back from the last oil change. No idea why but the shop used 10w30 instead of 5w30.
I've got a suspect wire to the ignition coil, being the 12 v power. Seems unrelated at this stage.
Any fixable causes for sounds like this or do I just need to get a professional diagnosis on the motor?
Oil pressure test maybe?
1994 Explorer 4x4 XLT OHV, 184,000 miles
Oil is 3/4 up the hash marks cold
First part of video is holding the phone above the valve covers, at ~1:00 I go under the engine.
I'm really hoping someone's going to say check vacuum lines or some sensor or to let the PCM relearn, but I've never heard this sound before after working on the truck. Sounds kinda like a 25hp diesel tractor. Weird thing I thought I heard a fainter sound like this more since I got my truck back from the last oil change. No idea why but the shop used 10w30 instead of 5w30.
I've got a suspect wire to the ignition coil, being the 12 v power. Seems unrelated at this stage.
Any fixable causes for sounds like this or do I just need to get a professional diagnosis on the motor?
Oil pressure test maybe?
1994 Explorer 4x4 XLT OHV, 184,000 miles
Oil is 3/4 up the hash marks cold
First part of video is holding the phone above the valve covers, at ~1:00 I go under the engine.