CR's popping out the exhaust....let's get it on !

[UNBROKEN]

I'm gonna stand by my and many others theory that it's from draining the rail.
I've seen one driving by me popping so bad the exhaust pipe looked like it was shooting out morse code signals.
Others contend it's a timing issue.
I've never heard timing "pop". Rattle, yes...
If pulling out some timing is stopping the "pop" in some trucks I contend that it's just due to making the motor just happy enough to live with low RP

We've all heard the popping noise.
WHAT IS IT?


For the record...I expect this one to get heated...so try to stay civil but put on your big girl panties just in case.
Now...let's figure this out....

[DIESEL_POWER]

Could be draining the rail like you suggest, or it could be a timeing pop.


Drainin the rail and popping would be from not enough fuel.
timing popping would be from too much pre ignition before TDC.

And then there are head gasket failures that allow water or psi from other cylinders in the wrong bore that cause popping too.

Then theres the whole programmer finger pointer theory....

[bbbxcursion]

Mine popped like crazy when I had a bad crank sensor. I thought I was draining the rail but it even did it on 1/2 power Smarty. Scoped the sensor and found out it was going crazy in the upper RPM band.

[jeff115]

when my rail pressure got low it would blow grey smoke and pop really bad and it only did it when the pressure droped really low.

[Scooter's Roofing]

whenever I lost rail pressure, the truck just nosed over and lost power and rolled a crapton of smoke out the exhaust

[LReiff]

Here is how I've experience popping and what I've tried, take it for what it's worth...back when Revo/TNT was first released.

Truck: '03 2500 auto 250 hp engine, stock injectors. Data logging while driving through a forced "pop" condition.

RP was any range

Fuel pressure from the LP never went below 15 psi.

Tried all RP settings, no change

Tried all the Torque settings and anything other than stock made it worse...hence my theory that torque adds timing

New fuel filter, no change

Swapped on a new CP3, no changes whatsoever, swapped back to original CP3

Capped rail, no change

New RP sensor, no change

Thought it was caused by low RP from slow reaction of the FCA when accelerating hard from a stop but I disproved that theory by accelerating easy until RP was at or above 10k before hitting it hard and it still popped.

By this time the customer was ready to call Bob and my hair was starting to go grey

This whole time I had been back and forth between timing 1, 2 and stock...switched to timing 3 and it went away if torque was kept lower than 2, tried timing 4 and it disappeared altogether.


I've since tuned numerous other 03-04s with Revo/TNT and have set power between 5&7, Torque 1-3, Timing on 3 or 4, RP wherever and have never had popping problems.

More recent
On my '04.5 TNT/Race tune, I had popping with the large (200+hp) injectors until I set Timing to 4.

[MissouriHooker]

You think it could be diffreant programmers? The triple dog I had did the popping thing real bad!, Switched to smarty and no more pop! Plus the tnt-r is way more aggressive then the crazy larry tune. Just a thought!

[rams-n-hogs]

Originally Posted by UNBROKEN

We've all heard the popping noise.
WHAT IS IT?

If we knew what it was, the problem would be solved.


All kidding aside, I've heard popping on 2 different trucks, but it was different on both of them. One was a blown head gasket, which kind of sounded like a miss. The other was caused by a pressure box, and it sounded almost like a machine gun popping out of the exhaust. Once the pressure box was removed, the popping went away. That led us to believe it was a pressure issue. I don't know if timing would pop out of the exhaust. I would think you would here it as more of a rattle.

[jeff115]

for got this in my first post but, If I turned the pressure up it helped alot with the popping

[Scooter's Roofing]

Originally Posted by MissouriHooker

You think it could be diffreant programmers? The triple dog I had did the popping thing real bad!, Switched to smarty and no more pop! Plus the tnt-r is way more aggressive then the crazy larry tune. Just a thought!

Bully Dog has **** for tunes on the 03-04 trucks

[Sandaholic]

I don't know that I've ever even heard "rail pop". Timing rattle I have for sure. Any video's on youtube or anything that I can hear rail pop? I have heard plenty of rattle from my truck running different tunes and programmers. The timing rattle never seemed to be associated with rail pressure. So I guess I don't have a theory. I just want to know what this rail pop sounds like.

And why is it more of an 03-04 thing. Does it have something to do with the 3rd injection event in some way?

[Scooter's Roofing]

it has something to do with the tuning... it sounds like the truck is popping and banging out. it's not timing rattle, WAY different

[jeff115]

sounds kinda like a ricer right before they launch when they start poping real loud

[JasonCzerak]

Originally Posted by jeff115

sounds kinda like a ricer right before they launch when they start poping real loud

Import.


Ricer is a term used to describe "idiots", doesn't matter the vehicle they drive.

[jeff115]

ok yes. import.

[Dodgentwo]

Originally Posted by jeff115

sounds kinda like a ricer right before they launch when they start poping real loud

Its called a 2-step.

And I agree, it sounds like a automatic gun going off kinda.

[7inchstack]

had it happen on my truck a few times, its only when i have the smarty on a tune that dosnt add timing. SW 2 and 6 have been the worst by far. if i put it back to SW7 its fine. also when its poping ive still got good rail pressure, so i dont think its draining the rail. im almost leaning more towards its a timing issue.

['strokeThis_'07]

Mine pops and surges with the Dr. P hooked up. Doesn't need to be turned up any, just plugged in it pops.

[jordanjames81]

going to be watching this one.

[rams-n-hogs]

Originally Posted by 'strokeThis_'07

Mine pops and surges with the Dr. P hooked up. Doesn't need to be turned up any, just plugged in it pops.

It was a Dr. P box that caused it on the truck I heard it on, and it is an 06, IIRC.