bad ecm?

[ryanharrington]

ok phoons back together fresh motor, mccoy stage 4, headers and 3 inch, aftermarket regulator set at 43, timing set to 0 with wire unhooked, prety sure everything is hooked up right, has stock injectors in it for now just to get it running, they are new, ive tried the chip that comes with the stage 4, 178a i think? and the stock chip, it wont do anything but idle super rich, and refuses to rev. ideas?

 

[ryanharrington]

Re: bad ecm?

awwww cmon guys!!!

 

[ashman]

Re: bad ecm?

that's classic symtoms of "limp home" mode

 

[gmcturbo]

Re: bad ecm?

prolly got some sensors unplugged or a ground missing

 

[ryanharrington]

Re: bad ecm?

any ideas where to start?

 

[MRKING]

Re: bad ecm?

Everywhere under the hood .check ground on pass side of block , and at battery . check to be sure every sensor plug is seated correctly and if all else fails , double check everything .

 

[ryanharrington]

Re: bad ecm?

i noticed in another post that theres 2 timing marks on the balencer think that could be my issue?

 

[ryanharrington]

Re: bad ecm?

bump

 

[jwaller]

Re: bad ecm?

is this chip 2bar or 3? and what map r u using?

 

[ryanharrington]

Re: bad ecm?

we tried the 137a and the stock chip with the samne results. stock map 0 boost

 

[SeattleSy#1255]

Re: bad ecm?

i noticed in another post that theres 2 timing marks on the balencer think that could be my issue?

use furthest to the left when looking down from the front of the truck. tan wire unplugged to time.

 

[ryanharrington]

Re: bad ecm?

i was mesinwith it today for a minute, with the wire attatched, itll start, and suge from almost no rpm to normal idle repeatdly till it stalls

 

[ashman]

Re: bad ecm?

the MAP can cause symtoms like this. make sure your getting the proper signals from the MAP sensor

 

[ryanharrington]

Re: bad ecm?

ill check that over the wekend. would be swet if someone local could come look at it