need quick help....chipping P72.....odd? *IT WORKS!!*
 

so im chipping this 95 P72 GSR ECU for this kid...its not like any of the others i have chipped... its got the outlined spot, but there is no place for me to add a resistor? the location just isnt there/marked on the baord??? you install it and you get a soild cell :-\ someone help me out here... thanks :-*

Re:need quick help....chipping P72.....odd?
 

Memeory serves me right the p72 doesnt require the 10k resistor

Re:need quick help....chipping P72.....odd?
 

1k ;) and no, p72 and p75's don't have r54, just j1, c51, and c52, they're fine without it.

Re:need quick help....chipping P72.....odd?
 

Yeah that screwed me up the first time I did a P75.

Re:need quick help....chipping P72.....odd?
 

soild CEL is fine? ::) this thing is starting to piss me off...tonight this ECU became mine, so it needs fixed...

Re:need quick help....chipping P72.....odd?
 

no, solid cel isn't fine, but it's not because there's on r54 present, i've done plenty of p72's and p75's, and none of them have r54, there's a problem somewhere else. remove the chip and cut j1, if the cel goes away, then there's a problem with the soldering, or you could have fried the 74hc. hell, i had a solid cel with an ecu and couldn't figure it out, desoldered and replaced the 74hc, still there, turns out i had missed a leg on the zif :P

Re:need quick help....chipping P72.....odd?
 

----....was hoping i wouldnt have to do that...the ECU worked before so the problem must lie in the chipping somewhere... guess i will start with the 74hc...

Re:need quick help....chipping P72.....odd? *STILL NO WORKY*
 

***UPDATE***

k, so i cut jumper...still soild CEL...

anyone help me out? this ---- sucks...

Re:need quick help....chipping P72.....odd? *STILL NO WORKY*
 

did you take the chip out also?

Re:need quick help....chipping P72.....odd? *STILL NO WORKY*
 

Take good close up pics of the back of the PCB, my guess is that you have somewhere joined a leg or 2 with solder.