What could it be? Flashing check engine w/o dtc
 

Well my truck recently started to get a Check engine Flashing light... ive been told its a misfire thing.. but the wierd thing is that the guy at the shop doesnt get no codes... he checked sparkplugs and wires ect.. he says their good.. i would think it could be a clogged injector... the truck sounds like it has a baby cam but it doesnt LOL any advice what could it be... ive been told it could be the crank sensor...The truck runs fine too.. but havent tried WOT.. i think my best bet is to take it to my tuner and check for DTC running it.. with HP tuners.. ??

Mine did the exact same thing your talking about. Turned out the bolts in the head had loosened up after the header install. All that extra air going out through the exhaust fooled the pcm into thinking it was lean. So it added more fuel and was pig rich! It idled ok, but choppy, and bogged like hell when ya out your foot into it. It was also throwing random misfire codes.

Yep, should be a p0300 multiple random misfire. Stock cam and stock torque converter? A scan with HPT should tell you everything you need to know.

well i have no headers i still have stock manifolds.. but maybe they are leaking or something.. mine still has the EGR may that affect something?

yhea well this started today after i got my built tranny i had a TB stall but now i have a TBSS stall its smaller but the guy said they are better in topend bla bla hes going to keep it for tonight and check it tomorrow to see if all cables are good down there ect... hopefully its something minimal... and if it dont stop hes taking it with my tunner and puttin it on HPT and running it to see what comes out.. he thinks it could be my crank position sensor... and yhea the truck idles a little choppy..

:bs:

Give him one more chance at figuring this problem out. After that you need to find a better mechanic... I'm already hearing things that sound like red flags, IMHO.

LOL well sht i guess he makes really good trannys but i dont know if that engine check light flashing has something to do with it... well hopefullly its all fixed by tomorrow i hope its nothing serious.. :(

Tabueno Alex, ya duermete. Manana a la escuela :)

Habla Ingles, por favor? Don't make me bust out the ban hammer. :judge:

I'd check crank sensor as well. When we did my trans we pulled the starter and ripped a wire out on ky crank sensor. But mine would even start. Maybe yours got bumped