V8 Engine Knock When Pulling Boat

[e4products]

I bought a 2001 Exploer EB AWD truck a few months back with the V8 package. Everything has ran great, but today was the first day I actually tried pulling my bass boat with it. It pulled it just fine, but when I would go up slight hills, there was a slight engine knock. The knock would go away if I would let off the gas, or when I would get back on flat road.

Since this was a pre-owned vehicle, what could be wrong?

I never hear this noise not pulling a load, even up hills.

Your advise is appreciated.

 

[X~FACTOR]

The previous owner might have changed the chip and it is now meant to run on 92 Octane. Try switching gas with higher Octane.

And btw, since you are new, word of advise. If you see someone posting asking to sign their guess book... close your browser... FAST!

 

[smiley1]

If you see someone posting asking to sign their guess book... close your browser... FAST!

Whaaa? I must be a newb then. What was your experience? Please share to be fare, care bear.

 

[supablake]

I've got a 99 v8 and I have the same probelm without having to tow anything. I notice it happening at around 2-3k rpm and under light acceleration. The service manager at the dealership said it was just the sound the v8 makes. RIGHT. I've tried going to a higher octane and the difference is minimal. I'd be curious if you find a solution

BLake

 

[monkeydude3]

sounds like carbon buildup. As far as I know seafoaming it is the best answer.

 

[james t]

Its detonation. Try Seafoaming it as suggested. If it still does it after the seafoam treatment, either go to a higher grade fuel or install some non-platinum plugs one heat range colder. Either way, the knocking is called detonation and it is damaging to the engine..... so uh try not to let it knock.

 

[Brett F.]

Its detonation. Try Seafoaming it as suggested. If it still does it after the seafoam treatment install some non-platinum plugs one heat range colder.

Ok such a freakin newb here but what do you mean? Heat range colder?

Sea-foaming it .... can I just have it sucked through the vacume tree on the back side of the TB? That spare vacume connect with the little rubber plug on it work fine?

Thanks

 

[aldive]

>> The heat range has nothing to do with the actual voltage transferred through the spark plug. Rather, the heat range is a measure of the spark plug's ability to remove heat from the combustion chamber. The heat range is determined by the insulator nose length and its ability to absorb and transfer combustion heat, the gas volume around the insulator nose, and the materials/construction of the center electrode and porcelain insulator.
In identical spark plug types, the difference from one heat range to the next is the ability to remove 70°C to 100°C from the combustion chamber. A longer the nose on a spark plug forces the heat from the tip to travel farther before it is absorbed by the cylinder head, which retains more of the heat in the plug tip - making the plug "hotter" than a similar plug with a shorter nose. Engine temperature will affect a spark plug's operating temperature, but not the plug's heat range.<<

from http://dodgeram.info/Engine-Gas/SparkPlugs/s_plug_faq.htm