'93 Explorer rough idle {possible dead cylinder?} Help!
Chad79
08-12-2007, 07:17 PM
'93 Explorer 2WD Auto
Hello everyone. Hoping to find some answers here. Bought the truck and found that I was having to top off the transmission fluid about every 2 weeks. I don't know where the fluid is going. I don't see any major leaks, ect. I accepted this as part of an older vehicle and went on about it.
A few weeks ago, the engine started missing out and idling very rough. Thought perhaps the plugs were shot and took it in for a tune-up. Mechanic informed me that my #2 cylinder had a burned out exhaust valve, and was getting 0 compression. With the mileage on the vehicle, and the cost associated w/ the repair, he recommending not repairing it considering this is my "secondary" vehicle.
As for how the transmission plays into this......I was thinking that I remember hearing about modulator valves in transmissions going bad and it sends transmission fluid up into the engine {via a vacuum line} sometimes fouling out spark plugs. Does anyone have any experience of this nature?
As far as troubleshooting goes, there's a nipple with several vacuum lines going into the intake. Of these vacuum lines one appears to go to the cruise control, another to the master cylinder, one I can't see where it goes, a smaller line that appears to go to the transmission. And finally there is a small rubber line (approx 2.5 inches long) that isn't going to anything. When the engine is running, a loud vacuum sound is coming from the short 2.5 inch line. I pulled the smaller line {that appeared to be from the transmission} and revved the engine a few times and found some small amounts of transmission fluid coming off the hose.
Hopefully this is enough informationi to get some ideas flowing. Any help will be greatly appreciated!!
Hello everyone. Hoping to find some answers here. Bought the truck and found that I was having to top off the transmission fluid about every 2 weeks. I don't know where the fluid is going. I don't see any major leaks, ect. I accepted this as part of an older vehicle and went on about it.
A few weeks ago, the engine started missing out and idling very rough. Thought perhaps the plugs were shot and took it in for a tune-up. Mechanic informed me that my #2 cylinder had a burned out exhaust valve, and was getting 0 compression. With the mileage on the vehicle, and the cost associated w/ the repair, he recommending not repairing it considering this is my "secondary" vehicle.
As for how the transmission plays into this......I was thinking that I remember hearing about modulator valves in transmissions going bad and it sends transmission fluid up into the engine {via a vacuum line} sometimes fouling out spark plugs. Does anyone have any experience of this nature?
As far as troubleshooting goes, there's a nipple with several vacuum lines going into the intake. Of these vacuum lines one appears to go to the cruise control, another to the master cylinder, one I can't see where it goes, a smaller line that appears to go to the transmission. And finally there is a small rubber line (approx 2.5 inches long) that isn't going to anything. When the engine is running, a loud vacuum sound is coming from the short 2.5 inch line. I pulled the smaller line {that appeared to be from the transmission} and revved the engine a few times and found some small amounts of transmission fluid coming off the hose.
Hopefully this is enough informationi to get some ideas flowing. Any help will be greatly appreciated!!
Chad79
08-19-2007, 07:36 PM
Thanks for the eager responses. Fixed it.
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