Injector rattle
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Senior User
Joined: May 2006
Posts: 410
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Injector rattle
I've heard the term used to described what to me sounds like too much timing in a gas engine. For example, in my truck, it will never do it in stock trim or using any stage of the Banks six gun.
But...when I use the SCT with any tune (from multiple vendors) that is hotter than a, say, a mild tow tune, I often get the "rattle".
The symptoms are this....it only does it with hotter tunes, under load. It spikes the EGT's, makes the rattle sound, blows additional smoke and actually seems like it is hindering performance. It also doesn't sound good for the motor. I have been told that intermittent rattle (couple seconds) is not problem, but I have done some 0-100 runs where it does it thru all the gears.
So, my main question is...what parameter is making this happen? Over advance injection Timing, overfueling, ???
At this point I am torn as what tunes are safe. I understand the pay as you play bit, that's not what this is about. I want to get the most power that won't unnecessarily grenade my motor due to the something like this.
Putting the truck back to stock is just a way too boring of a solution....
But...when I use the SCT with any tune (from multiple vendors) that is hotter than a, say, a mild tow tune, I often get the "rattle".
The symptoms are this....it only does it with hotter tunes, under load. It spikes the EGT's, makes the rattle sound, blows additional smoke and actually seems like it is hindering performance. It also doesn't sound good for the motor. I have been told that intermittent rattle (couple seconds) is not problem, but I have done some 0-100 runs where it does it thru all the gears.
So, my main question is...what parameter is making this happen? Over advance injection Timing, overfueling, ???
At this point I am torn as what tunes are safe. I understand the pay as you play bit, that's not what this is about. I want to get the most power that won't unnecessarily grenade my motor due to the something like this.
Putting the truck back to stock is just a way too boring of a solution....
Former Vendor
Joined: Mar 2004
Posts: 4,362
Likes: 3
From: Hendersonville, NC
I'm with Tim on this one, Brad. Check your fuel pressure. Normally the stock pump doesn't have much of an issue keeping up with fuel pressure on normal tunes, but anything out of the ordinary might be causing a drop. Fuel pressure loss = LOUD injection. Some of what you are hearing is the rail (injection) pressure coming up and spiking in the oil system.
If it is a fuel pressure issue, a return regulated system and/or a FASS would help significantly. I'll actually be around and available today, so give me a call
I got your message BTW.
If it is a fuel pressure issue, a return regulated system and/or a FASS would help significantly. I'll actually be around and available today, so give me a call
I got your message BTW.
