i have a stock ls motor, i just added ctr pistons and arp rod bolts. now it doesnt run. it will start and run like **** for a little while, and if i give it gas, it dies. i got a cyk code out of it once, but other than that no codes. when it is running if you unplug the map sensor it doesnt stall, i know that it would normaly. i borrowed some spare parts from a friend, figured i would try replacing the electronics and see if that helped, it didnt. i tried a new ecu, coil/ignighter, map sensor. i have spark and fuel and the timing is all lined up, compression test is 210 accross the board. i have been told that i might need to adjust the timing to compensate for the ctr's. is this correct? if so can i do if by adjusting the teeth or will i need adjustable cam gears? any help would be greatly appriciated. i now have to borrow a car to get around. thanx

 

sound to me like your timing is off?

 

well, that was my first thaught but i have checked and rechecked it, and its dead on. but do i need to adjust it differently because of the new pistons? someone told me that i may have to. can someone confirm this? or should the stock timing be ok for this setup? if the stock timing is ok what else should i check?

 

bump

 

maybe you switched the tps and map plugs by accident???

 

thaught of that too....switched and no differance.

 

now the timimg is dead on right your not 180 off are you

 

^^word. take off your distributor and turn it 180 degrees.