For you gas RC truck people- my Traxxas 2.5 & 3.3 engines wont start?

ive got 2 clic 2.5 tmaxxes- mine has a 3.3 and my dads has the 2.5 engine in it. i just rebuilt both our trucks(due to servo failer etc). My problem is that neither one will start. Before we stored them bout 9 months ago they both ran great. Ive checked everything I can think of- cleaned the carbs, reset all the needles, both have good compresion, ez start turns both engines, glow plugs have good ground and will light(using new plugs), fuel is reaching the carbs, air filters are clean, using fresh 20% traxxas fuel, the engines were reembled clean and exactly the way they are sop posed to be. My dads had a decent amount of corrosion inside (I cleaned the corrosion off with fine steel wool and WD40) some how his didnt get cleaned very good after we ran them :confused: . allso recently when i took his engine apart, i found that half of the bottom of his piston is broke off(i think it was running like that).The guy that had the truck before us destroyed the top of the 2.5 that is in my dad's truck- so he put a new head and piston/sleave in it (which havent been run much after break in) My engine has had only about 10 tanks of fuel run through it. Lastly, we hooked a 6 volt battery charger up to the black ez start handheld thing so we dont have to worry about batteries. Is there anything i'm doing wrong? Any help would be greatly appreciated!