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post #1 of 11 (permalink) Old 11-28-2006, 12:56 AM Thread Starter
 
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Running rough on cold startups

Lately I have been noticing that the Intrepid has been idling rough on cold start ups. I have also noticed a strange ticking sound coming from the back end of the car at the same time. The Keydance reveals no codes. Could this ticking noise be the fuel pump?? It does it for a few minutes and gradually goes away, the mis firing at low RPMs stays until the car warms up. Any ideas? No noticiable misfires at highway speeds either.
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post #2 of 11 (permalink) Old 11-29-2006, 07:11 AM
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How cold are you talking? What kind of oil are you running? If in really cool weather you should be running a thinner oil.. The rattle in the back is probably the flange on the exaust..

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post #3 of 11 (permalink) Old 12-02-2006, 11:35 PM Thread Starter
 
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Quote:
Originally Posted by VegasTrep02
How cold are you talking? What kind of oil are you running? If in really cool weather you should be running a thinner oil.. The rattle in the back is probably the flange on the exaust..
The rough idle has been happening for a couple months now. It is in the mid 20's-30's now but even when it was mid 40's in the A.M. it was idling a little rough. The ticking noise from the rear doesn't sound like a rattle. Just a tick, tick. tick that goes away after a few minute warm up. I am currently running full synthetic valvoline 5W30.
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post #4 of 11 (permalink) Old 12-04-2006, 12:38 PM
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First thing to check is the spark plug. Did you need to change them? and if you change the spark plug only use champiom OEM spark plug.
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post #5 of 11 (permalink) Old 12-04-2006, 02:56 PM
 
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***"Engine Treatment - ***Sea Foam"*** time pal!, ;), I just did that on my lunch break today!, So Much smooother than Baby's silk now!, ;) Gotta try it! Gurranteed to help with the ticking noise, put some through your intake vacuum source line, (I unplugged my cruise control vacuum tube near the intake, and had teh engine running, and let it suck about 1/4 of the 1-pt can, and shut off engine, wait 5 minutes, re-start her up, let her suck alittle more in, turn her off, wait 5 minutes again, and then restart her up, plug the cruise control vacuum line back up, let her idle for about 10-15 minutes, and then pour the rest of the Sea Foam in your tank(have atleast a half a tank already in there to mix pretty good with this stuff,), and then enjoy the smoke show for a bit, and off you are, and let us know how it turns out pal!, ;)(the can is about $7.00USD @autozone)
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post #6 of 11 (permalink) Old 12-05-2006, 01:07 AM Thread Starter
 
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Quote:
Originally Posted by ACR
First thing to check is the spark plug. Did you need to change them? and if you change the spark plug only use champiom OEM spark plug.

The plugs were replaced less than 10k ago
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post #7 of 11 (permalink) Old 12-06-2006, 12:35 AM Thread Starter
 
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Quote:
Originally Posted by luisa
***"Engine Treatment - ***Sea Foam"*** time pal!, ;), I just did that on my lunch break today!, So Much smooother than Baby's silk now!, ;) Gotta try it! Gurranteed to help with the ticking noise, put some through your intake vacuum source line, (I unplugged my cruise control vacuum tube near the intake, and had teh engine running, and let it suck about 1/4 of the 1-pt can, and shut off engine, wait 5 minutes, re-start her up, let her suck alittle more in, turn her off, wait 5 minutes again, and then restart her up, plug the cruise control vacuum line back up, let her idle for about 10-15 minutes, and then pour the rest of the Sea Foam in your tank(have atleast a half a tank already in there to mix pretty good with this stuff,), and then enjoy the smoke show for a bit, and off you are, and let us know how it turns out pal!, ;)(the can is about $7.00USD @autozone)
Did the seafoam today. The idle is a little bit smoother, no doubt. We'll see how a tank full of gas with the seafoam in it improves things further. The ticking however is still there. It isn't a lifter tick or anything like that. Its from the rear of the car when you first start it up.
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post #8 of 11 (permalink) Old 12-06-2006, 10:43 AM
 
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where exactly in the rear of the car?, Can you get a good close listen to where you think its coming from?, Exaust pipes?, only on morning intial startups?, ect....
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post #9 of 11 (permalink) Old 12-06-2006, 12:51 PM Thread Starter
 
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Quote:
Originally Posted by luisa
where exactly in the rear of the car?, Can you get a good close listen to where you think its coming from?, Exaust pipes?, only on morning intial startups?, ect....
only on morning initial startups and when I leave work 8-9 hours later. strangely enough I didn't hear it this morning. . . Doesn't sound like exhaust rattle.
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post #10 of 11 (permalink) Old 12-06-2006, 01:42 PM
 
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Its probably the fuel pump making the tick tick sound. Some mornings I can hear mine and other mornings I don't. Almost sounds like its coming from the rear seats, probably because the fuel tank is under/behind them.
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post #11 of 11 (permalink) Old 12-06-2006, 02:52 PM
 
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Smile

Quote:
Originally Posted by froggy81500
Its probably the fuel pump making the tick tick sound. Some mornings I can hear mine and other mornings I don't. Almost sounds like its coming from the rear seats, probably because the fuel tank is under/behind them.
that is correct!
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