I have been using a predator for a while, and have multiple upgrades done to my truck:

2001 Chevy Silverado 1500
5.3 V8

Pacesetter long tubes and off road Y (no cats or rear o2's)
Dyno max muffler
MSD 8.8 wires
NGK plugs
Powerbond 25% balancer
K&N filter (no cold air intake crap)
and of course the ...

Mike, anyway to diagnose the valve springs with out tearing it down? It's the stock valves springs in it.

mikel wrote:weak valve springs will cause random misfires as well....

I thought you might say that.

I cleaned it about a week or so ago. I didnt' use CRC, but I used automotive electronic cleaner. Been getting that P1133 code since I took the crap custom tune out of my truck. I'm pretty sure that is the cause of that particular code considering the long tubes. RPMonline did a crap tune from the go ...

Yeah, well I swapped the plugs, and though the motor seems to be running a bit smoother, the misfires are still there. Just doesn't make any sense. Once the motor warms up and gets down the road, seems like the misfires are slim to none.

I'm going to swap the TR55 plugs for factory Iridium plugs probably today, and see what happens.

You're not the first to tell me that about the MSD's. Disappointing if you ask me. Problem is, the main reason I got MDS wires is because this particular model allows me to bend the boot away from the headers. With Long tubes, I can't install heat sheilds on the boot, and I am scared that the stock ...

The cylinders are still misfiring, not sure what to do from here.

The wires are well away from the headers though. Both sides run directly from the installation point to the back side of the frame. I checked the wiring for burns and crimps, but didn't find anything. If I had a picture i'd show you, sorry about that. But, the upstream O2 mount at an angle (very ...

The bank 2 O2 sensor is a week old. And agreed, long tubes have a tendacy to fry cheap O2 sensors. Funny thing, I have the bosch (cheapo) sensors installed. I got home this afternoon, checked my codes, and guess what is there? A p1133 code. BUT!!! I'm also still getting random misfires on bank two ...

That's not entirely accurate. Though, I understand your support for your product, The more popular and reputable websites like silveradosierra.com or performancetrucks.net have documented instances where the tune did infact cause similar/identical symptoms. Of course, not just with a predator, but ...

Just what is in the title. I have a predator for my 2001 silverado with a 5.3 V8 (Pacesetter long tubes, ORY, Powerbond 25% underdrive, MSD 8.5's, TR55 plugs, K&N Filter w/ stock airbox). For starters, I pasted a link to a website where I have been tracking my repair efforts and requests for ...

I don't have a 93 or 91 tune, just the diablo tune. The canned tune for my truck was better than after I ran a log through Redux and adjusted my injector slope. What a joke. I reset the defaults and my truck is running hard again.

I went ahead and returned the tune back to default and reinstalled it. Now, my truck is a rocketship again. After I had changed my slope to -9, my truck was boggy and the fuel mileage was absolutely terrible, as I noted above. I have a feeling because of my K&N filter (stock air box) and strait pipe ...

2001 silverado, U7198 Tool....



WTF???!!!!!!!!!!!!!!!! After a quarter tank of fuel, and note, my truck is getting horrible mileage, like, i'm getting almost half the mileage I did before I changed my fuel slope to -9 per redux's recommendation.


First of all, I begin recording once i'm at the ...