riddle

Thank's Mr.P The machinest Only wanted my piston, I never gave him the rings?? As for the plug it looked fuel fouled, ( wet, carboned up ) the rest were white-ish. I only wanted to do the piston in the truck cause: I have a 24ft garage and a 20ft truck, lol. last time I pulled the engine I did it outside, 70 degrees. Now the temps are 0 degrees! from the pricing I am finding, to set my truck up right, w/new intake, injectors, intercooler, and IAT mod It is gonna set me back another 4 thousand! Guess I have to do it though, lol

UPDATE: Hey, everyone thanks for the help and insight as to what is going on with my truck,specially in the programming department. Status at this point is the rings in #7 are not sealing. the piston (70%) that I could see looked good. I added oil to the cylinder and compression would be right with the rest of them. treid to free rings up, the cylinder would fire occasionally, my code switched fro p0300 to p0307. Gonna try to pull the piston with it still in the Engine still in the truck. Any Ideas on what could ruin those rings??? That is the same cylineder I had a sleeve put in, but they set the cylinder wall clearence to those pistons.?? heat maybe??

Looking at my Log, ( INJ. Duty cylce is @ 98% , TPS 100%, 5854 peak RPM. )

UPDATE: Just checked on the cylinder w/ bore scope, I could only see bout 70% of the piston and it looked good,(Hell I was excited to see it was still there) So I added 5w40 inot the cylinder and the comp. rised from about 5psi dry, to 108 psi wet. Telling me that my rings are shot? Still wondering what that erratic rattle might be? Ring chunks? not sure? all the other cylinders are 150psi dry. anybody change that piston while it was still in the truck? Maybe I will have to yard the head off tommorow. SUCKS, (also spark plug wasn't beat up like last time I blew up.

I have 42lbs injectors, thanks for the help, who can test them? also I have an extra set of 8 brand new injectors 42lbs, maybe I should check those too? Thank You, Dan

I only have the standered version of HPT,so I dont know how to get afr, w/o wide band, is it possible?

Chase, Thanks for the insight, thought it was weired to do this twice? I like the intake, especially haveing the MAF/IAT on the boosted side, who makes it? I have never seen one? where do I get one? Thank's I have the stock blower S-Trim I beleive? w/ the 3.3 pully I lost alot of boost w/408 went from 8psi to 4psi, I have installed a 2.8 inch pully and got the 408 boosted too 9-10 psi Cam spec is 550 lift intake and exhaust, and 204/218 duration int/exh. ( stock 02 Z06 cam ) also running Z06 CNC gm performance heads, kinda did the build based of the SA Designs book how to Hot Rod gen 3 chevy.

Here is a LOG from HPTUNERS about 75mi ago. Is there somthing I am missing to cause this? Any help would be greatly appreciated. sorry guess I cant upload it..

To Keep it short, I had a stock LQ9, with a vortech blower: completely destoyed #7 piston, chiped cylineder wall, bent rod. I went through past post and seen many of you had pictures that looked like mine. Has any body else destroyed this cylinder? So I built a 408ci stroker as a replacement while I had it out. I have 1000mi on my stroker and it threw a p0300 code yesterday and started running rough, and had an intermettint rattle kinda like valve train. I had it towed home, diaged it and found 5psi compression in cylinder 7, and 150 psi in the remaining cylinders I have JE forged dished pistons, I have valve covers off, dont appear to be valve train, Waiting on a borescope to see what is really happening. ( will update on condition ) WTF, I did the motor myself and I Spent $6000 in parts! AKA: All the extra money I have aquired since last january.

Boost Is a measure of restriction, so yes. the more You make your engine flow u will lose boost psi.(remember you will still be making more power cause you are just using more of that un-used air.

Just a thought, I would pull the lens off, and pull the tach needle off it's pin and reset the tach needle to zero, and try that first. I intsalled white face guages on another vehicle and ran into that type of problem i didn't press the needle on far enough.(those clusters often go on the fritz too, a dealer can run a guage sweep w/factory scan tool and give you a better idea.) ~Dan

Looks Rad! who made the drop spindle's? Thanks.

Screamin Deal! Looks sharp. dig the color! LOL

Good point, I Have First extended and they have never covered a repair. It's either abuse or not imparative to repair.(after I wasn't worried about voiding warrenty "cause i basically didn't have one" I did a full build) "Major Gurad" is GM's Warrenty. make sure it says that, or it is not authentic. best extended warrenty for your truck. In my Opinion as a GM Technician ~Dan