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tlee
Dodge Dakota
JOIN HERE
9/09/2006
14:22:53
|
 Subject: pinging
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Message:
I have a 99 3.9 liter dakota. If I run regular unleaded gas pings really bad under load or accelerating. Runs really good and lots of power when cold. As soon as the temperature hits normal operating range, starts to ping or rattle on the valves? If I run supreme gas or put in octane booster, runs o.k. I had this same problem when I first bought it and the dealer reprogrammed the PCM...not sure if that has anything to do with it or not. As far as for what I've tried to fix the problem: changed cap, rotor, plugs, wires; Ran a bottle of injector cleaner; and had the diagnostics checked even though the check engine light is not on and came up clean. Any suggestions would be a great help and hopefully save me some $$$$.
thanks
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prple-gaseatr
Dodge Dakota
JOIN HERE
9/09/2006
17:13:18
|  RE: pinging
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Message:
could b the plenum gasket, look down your throttlebody and look to see if there is oil in the bottom of the manifold
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Joe M.
Dodge Dakota
JOIN HERE
9/10/2006
21:44:49
|  RE: pinging
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Message:
1 range colder on the spark plugs will help a bit
and sounds allmost like you also might have IAT sensor probs.
& as stated above in the first reply check that plenum gasket
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J and J Auto
GenII
9/11/2006
21:51:18
| RE: pinging
IP: Logged
Message:
colder plug
if you live in a warmer area 180 thermostat
check both IAT and engine temp sensor
o2 bad running lean
vac leak
low fuel pressure
any of these will cause it to ping
Larry
J&J Auto
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tlee
Dodge Dakota
JOIN HERE
9/15/2006
01:38:05
| RE: pinging
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Message:
this may sound stupid but what is the iat sensor?
thanks for all the tips and info. If I get the problem resolved, I'll pass on the solution.
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xmr2
Dodge Dakota
JOIN HERE
9/15/2006
09:52:50
| RE: pinging
IP: Logged
Message:
iat = Incoming Air Temp, sensor. located on the manifold on the passenger side just behind the thermostat housing. Should be a two wire gray plug.
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zzark
*GenII*
9/16/2006
11:57:07
| RE: pinging
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Message:
Replacing the EGR is what finally worked for me.
zzark
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daddio
Dodge Dakota
JOIN HERE
9/16/2006
16:38:10
| RE: pinging
IP: Logged
Message:
zz, '99's don't have EGR.
tlee, follow Larry's advice.
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zzark
*GenII*
9/16/2006
18:50:35
| RE: pinging
IP: Logged
Message:
daddio,
Well then, I think he should add one.
:)
zzark
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