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23:56:00 - 12/19/2024
V6 Dakotas
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syphon86
Dodge Dakota
JOIN HERE
3/04/2005
21:54:15
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 Subject: 92, 3.9 prob
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Message:
I have a 92 3.9, 4wd 5sp with 148kmiles. Its been a great truck, but I have a few questions about it. I bought it 2 years ago with 108kmiles. I have changes the oil every 3kmiles and the oil has been perfect for a long while. Now all of a sudden its full of dirt and crap. If you pull of the oil cap on the driver's side the oil is clean and smooth along within the inside of the valve cover, but on the passenger side its full of buildup and crap. If you stick your finger in the valve cover you can pull out dirt and grime.
Its been like this for the past few months. oil doesnt seem to be leaking from that valve cover either. One thing I have noticed though is my throttle body gets dirty often and I have to clean it with carb cleaner while its idling to keep it runnning somtimes. When it gets real dirty it wont idle. I have a replacment k&n air filter and a while back I took off that cover in the grill that goes infront of the air boot. Now I think i have lost the cover and it seems like there is alot more buildup of dirt in my air boot than usual. Its ran like this for like a year or so.
Also, when its real cold out, like around 10 or 15 degrees, when I start it in the monrning it will sputter and miss for like a half hour, then it will run perfect. This only happens when its real cold.
I have gone through like 4 exhaust set ups with this truck: no cat - muffler, no cat - glass pack - no tail pipe, high flow cat - glass pack - tail pipe, high flow cat - turbo muffler - tail pipe, now my tail pipe was ripped off and its a high flow cat with a leaky turbo muffler. I dont know which rout to go now. If i should sink my money into duals or what. I'd like to re do the whole system from the y-pipe back but dont know if its worth it. BTW I commute with this truck about 400 miles a week to school, 16mpg sucks.
AND the truck of course makes wierd pinging noises when it idles, def not a valve tap, almost sounds like a deisel, but not really. Always ran well, just that weired noise, could be timing chain? PLUS, the trans has been making a whiniing noise in every gear for like forver. I just changed the fluid last week, no diff in noise. But there was some metal shavings in the old gear oil.
One more thing, I had the rear main seal changed a while back along with the clutch. When this was done my mechanic also put in an oil pan gasket, BUT IT LEAKED, he said it may have been faulty gasket, but he never replaced it, just used some sealing spray on stuff instead, which kinda worked, BUT I drove it for a while with it leaking and oil got all over the trans and such, now my new clutch chatters,whats up with that?
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Dan M
Dodge Dakota
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3/05/2005
08:10:29
|  RE: 92, 3.9 prob
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Message:
The 3.9 is notorious for timing chain rattle. Do you know if it was ever changed? Supposed to be changed at 100k miles. Mine sounded a little bit like the cat was going bad. There is a how to on this website for changing it.
My 95 CC 3.9 4x4 auto still idles a little rough. It's gotten better since I flushed the engine (had a lot of crud in the oil). It also improved my gas milage (back to ~17 combined city/highway from <14). It has also improved a little since i replaced my breather, pcv and gaskets for both, I think I had a little leak around both. The gaskets were very hard and a pain to get off. After I fix my heat/ac control problem, I'm going to pull the bed off and fix my fuel gauage (2nd time it quit working, first time was sending unit). While I've got the bed off, I'm going to check the fuel system. I had a bad problem on thursday when the truck would miss while driving (started on highway on way into work) and continued running rough and almost died a few times until I filled up the tank. I'm thinking there's some dirt in my gas tank. At times on thursday mine sounded like a diesel too. It's odd that simply filling up the tank fixed that.
- Dan M
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