Why do my valves rattle when i floor it? - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
 
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#1 Old 11-26-2005, 12:20 PM
camaro 22
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Why do my valves rattle when i floor it?

Just as my title says. My valves ratter when I floor it at times, and when going up steep hills? Is something wrong? I use the cheap gas. Think it's 87. But if I recall, I think I read in the manual a while back that it says not to use anything higher than 87. Could something else be the problem?

1999 Durango SLT 4x4 5.2

1997 Camaro Z28 Vert Modded

2003 Yamaha R1 Silver

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#2 Old 11-26-2005, 12:27 PM
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You sure it's not knocking from the gas? I'm sure the manual said not to get lower than 87 and that you may not need more than 87.

Paul
02 Durango (build 11/01) SLT┼ AB/BLACK INT 4.7L NGC 45RFE PT3.55 LSD 4X4 - Superchips 3715 Performance - Sensatracs - Chrome Nose - Carriage Works Billet Grilles - APC Clear Corners - Infinity 6022i's w/stock tweeters - - Hidden Hitch - Silverstar 9007ST's - K&N high-flow 33-2175 air filter- TFP Chrome Handles - 33K Miles - (MB Gunner Chrome Wheels + General Grabbers wintering in basement) Hammered blue factory rims
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#3 Old 11-26-2005, 02:39 PM
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That's pinging for sure. You need to run higher octane gas, which is ALWAYS better for your motor. The higher the octane, the more efficient the fuel burns and you'll get better gas mileage to boot.

If higher octane doesn't do the trick, switch to a colder spark plug such as Autolite 3923's or Denso IQ22's.

Hope this helps!

John
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#4 Old 11-26-2005, 02:44 PM
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I owned the truck for 2 years now, and never tuned it up or anything. Do you think I should just change the plugs anyway? They're prob original being i bought the truck with 50K miles on it.

1999 Durango SLT 4x4 5.2

1997 Camaro Z28 Vert Modded

2003 Yamaha R1 Silver

Mods so far. Flowmaster 40 series D/O muffler
Ram air cowl hood
Full body kit
20in chrome wheels
White faced gauges
CAI
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#5 Old 11-26-2005, 03:06 PM
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Ummmmmmm Hell Yes! You should change plugs every 15-20k or so, IMHO. Then after you change plugs, get it serviced.... oil change, get a K&N drop in filter, etc etc., get better plug wires. I think even after just changing the plugs and going to higher octane you'll see the pinging go away, but the other stuff is also needed.

John
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#6 Old 11-26-2005, 04:24 PM
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sounds like marbles in a can right? JW's hit it on the head


rock
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#7 Old 11-28-2005, 11:16 AM
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I had the same problem. I kept my plugs and wires stock (not that those aren't good mods) and gave it a treatment with SeaFoam engine cleaner in the intake. It fogged up the neighborhood with thick white smoke for a few minutes, but I haven't heard any pinging since. (I told the neighbors I was testing the smoke-screen.) I've also started adding an injection/valve cleaner to the fuel tank with every oil change just to keep things clean. I still run 87 too-- no need to pay more for gas if you use SeaFoam to get the carbon out of your engine. (There are other engine cleaning products-- that just happens to be the one I used.)

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#8 Old 11-28-2005, 06:32 PM
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I quit using high octane due to poor gas mileage and increased cost. If the engine is tuned for regular it shouldn't ping. May have been tuned with premium at some time in the past.

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#9 Old 11-28-2005, 07:29 PM
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Yes the stock durango engine is tuned for 87 octane. There are factor that may cause a need for higher octane such as a need for tune up (plugs, wires, cap rotor) leaking plenum gasket (common failure) and in general worn engine. The only way to "tune" the engine for premium is to change the PCM or increase the compression ratio.

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#10 Old 11-28-2005, 09:09 PM
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Mopar sells 'top engine cleaner' which I was recommended to buy for my old Caddy. It did wonders (besides the black smoke which turned white). Ran much better but still neded prem.

Paul
02 Durango (build 11/01) SLT┼ AB/BLACK INT 4.7L NGC 45RFE PT3.55 LSD 4X4 - Superchips 3715 Performance - Sensatracs - Chrome Nose - Carriage Works Billet Grilles - APC Clear Corners - Infinity 6022i's w/stock tweeters - - Hidden Hitch - Silverstar 9007ST's - K&N high-flow 33-2175 air filter- TFP Chrome Handles - 33K Miles - (MB Gunner Chrome Wheels + General Grabbers wintering in basement) Hammered blue factory rims
Wife's Ride : 2006 Grand Caravan SXT INFERNO RED
Work Ride : 2009 Ford Edge SEL
Daughter's Ride : 2011 Jeep Compass Latitude
Son 1's Ride : 2012 Nissan Altima S Coupe
Son 2's Ride : 2006 STi Stage 2 Grandma Gray (kinda mine, too)
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