I have already posted a message about what I think is a pre ignition condition on my new 04 Hemi. However, while looking around the forum I read about the Hemi "Tick", and wondered what it was, as well as if it could be the sound I am hearing?

What I hear is a knocking sound very similar to pre ignition under two conditions:

1. The truck is under a light load, eg going up a hill
2. The truck is operating between 1800 and 2500 rpm's.

I have always run 89 octane in it, and have just put in my first tank of 91, to no avail. It has only 1100 miles at this writing.

 

I, too, have the HEMI tick. I thought it was pre-ignition, so i ran a coupla tanks of 91 Shell, to no avail. The dealer ran the computer on it and said specs were OK. Any suggestions would be appreciated by me, too...
Homee

 

My non-Dodge truck did the same thing. I went from 87 octane to 89 to 91 to 93 (Chevron) when it finally stopped. I also bought some octane boost from www.autobarn.com that kept it from coming back. Those engineers must be trying to squeeze every fraction of a mile from each gallon of gas....[:@]

 

Come to think of it, the high octane fuel I used was Shell V-power, which is 93, I think. It still didnt work. Do you think that Chevron gasoline would make a difference?
I've heard that ALL the formulations, within each grade , are the same.
Would be nice if there was a dealer fix, tho...
Is this possibly some problem which wouldn't show on the diagnostic computer???
Homee

 

All,

The Hemi tick is best heard when the truck is idling, and has been for 5 minutes or so.

Dave

 

I didn't know that Yamaha make Dodge Ram tooj/k
If you ride , you know what I mean.

 

Can you hear the tick at speed, or only at idle?

 

I have been using 93 octane to no avail. I am going to run mine by the dealer this week.

As for the computer question. I understand, and I may be wrong here, there is no knock sensor in the Ram, no sensor=no reading. The only way the computer would indicate there is a problem is if another sensor read a problem, such as an EGR sensor or oxygen sensor. Were any of the sensor's putting out a code on your truck?

 

They may tell you that it's the valve lifters and that they were designed to work that way...that's the story I got on my Honda...it ran like a top all the time, but the sound was a different story...[:'(]

 

I assume it might be heard at any speed depending on how loud it gets. I only really hear mine if easily if the truck has been idling. If I come to stop and get out truck I have pop the hood to here it, but after a long idle, I can hear from 15 feet away.