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Neil
Dodge Dakota
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1/09/2003
22:10:06
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 Subject: Timing?
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my 93 rc is making a noise that sounds like a spark knock. When i first got the truck it did the same thing. I changed the wires and it fixed it. I tried changing the wires this time and it still does it. So i also went ahead and changed the plugs, cap, and rotor. Still does it. I have no idea what is making it do this. It only does it when the rpms are low and i step on it. It does it really bad when it is cold. Any ideas? Maybe timing chain? Aren't they popular for going out?
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Neil
Dodge Dakota
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1/10/2003
17:04:54
| RE: Timing?
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anyone?
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Mopar1
Dodge Dakota
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1/11/2003
14:15:44
| RE: Timing?
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maybe it is the belly pan gasket
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Neil
Dodge Dakota
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1/12/2003
22:56:53
| RE: Timing?
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umm, thanks for all the responses. Anybody else?
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fubar1
Dodge Dakota
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1/12/2003
23:08:17
| RE: Timing?
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What Mods do you have!
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Neil
Dodge Dakota
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1/12/2003
23:24:12
| RE: Timing?
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i have 40 series flowmaster, k&n open element air filter, iat relocated, tps mod, ported v8 tb, ported intake, autolites, and 3.91(not installed yet though) oh yea its a 93 dakota
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Chip B.
Dodge Dakota
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1/12/2003
23:42:43
| RE: Timing?
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What you're describing is called spark knock or pre-detenation. This occurs when the intake charge ignites prematurely. several things can cause it and each has a differant cure. diagnostic work to locate your problem is in your near future......One side note....octane number is a measurement of a fuels ability to resist predetenation. The higher the number, the less likely-hood it will predetenate under compression, which is why high octane is required for high commpression engines.
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Neil
Dodge Dakota
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1/13/2003
15:50:28
| RE: Timing?
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hmm, thanks alot i will try out the higher octane. do u know of anything else that can be leading to my problem? coil?
your help is greatly appreciated
Neil
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Chip B.
Dodge Dakota
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1/13/2003
17:48:15
| RE: Timing?
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Worn bushings inside the distributor shaft. Bad or poorly connected spark plug wires,(new doesn't allways mean good). Timing chain worn out enough to effect timing. yes, the coil not providing proper juice. Spark plugs in very bad shape. If the porcilan has even a hair line crack....I'll bet the computer could cause it also.
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Neil
Dodge Dakota
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1/14/2003
15:17:18
| RE: Timing?
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well i just filled my tank with with 93 octane, and it still does it. The spark plugs are brand new (autolites). It did it with the old plugs too. It has new wires and it did it, so i thought i had a bad wire, so i took them back and got new ones and it still does it so i know that it is not a wire. I dont know about the coil or bushings or timing chain. Is there a way i can check to see if they are bad?
thanx again u have been a great help
Neil
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Neil
Dodge Dakota
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1/14/2003
15:38:48
| RE: Timing?
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another thing, i have my iat sensor relocated. Do u think that it is to cold out and now i am running rich? I live in Michigan and it is pretty cold
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Neil
Dodge Dakota
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1/14/2003
18:10:50
| RE: Timing?
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ok, nevermind the iat senosor, i moved it back to the stock location and it still does it. I never really realized how much of a difference the relocation made until i put it back. WOW!
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bludakman
Dodge Dakota
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1/14/2003
21:00:32
| RE: Timing?
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Neil...Mopar1 has a very good place for you to look - the "belly pan gasket" It seals the bottom of the intake manifold and when it blows out, oil gets sucked into the intake and will get burned in the combustion chambers along with fuel mixture. It will have negative effects on octane, regardless of what type you are using. You should also check the timing chain for wear, the OEM ones are junk to begin with (in terms of slack). If replaced with an OEM type, be sure to get the tensioner that is made for it.
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Neil
Dodge Dakota
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1/14/2003
21:52:13
| RE: Timing?
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IS there any way to check that without pulling the cover?
thank you,
Neil
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Neil
Dodge Dakota
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1/14/2003
21:54:10
| RE: Timing?
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...and is there any way to check the belly pan?
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Deep Purple
Gen III
1/15/2003
08:00:05
| RE: Timing?
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Two ways for you to check for leaking belly pan. Look down the throttle body with a flash light. With the butterflies open, if you see a lot of oil, it's leaking. A little oil is normal. Next, remove the pcv valve from the valve cover, remove the hose from the air hat going to the valve cover. Put your thumbs on the valve coverand the hose. If you feel a vacuum when you remove one of your thumbs, it's leaking. A small leak is harder to detect. It does sound like the belly pan. Many post about it here. Be sure to check them out before you start. Chrysler has a new repair kit for this too. Good luck.
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