Idles good then dies...

[tta1401]

Been trying to figure out a problem for a while. Long story short, changed wires, coil pack/module with known good ones, ecm, maf, checked grounds and power cables, etc... Noticed this when the car started breaking up real bad now when cruising, car will just flat out die. Fuel pressure is good. New O2 sensors. Only thing I haven changed was the crank sensor and chip. Anyone else ever have this problem? Your solutions? I'm out of ideas...

 

[trixdout]

What maf and what chip do you have?


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[tta1401]

3.5", TT WB v6.1... I went out and swapped to the stand-by fuel pump (RT dual in-tank) and same symptom. I logged the idle and about 7 seconds in I got a ton of trouble codes. I've been talking to Eric and he noticed the WB was reading high and suggested I change out the O2. It reads as it should now but still have this problem. Attached is the log (WB disconnected at the moment).

All those trouble codes has me worried. As mentioned earlier, ECM was changed out. I don't think a corrupted PL would cause this as it reads correctly.

BTW, only upgrades are alky, PLX WB, and new chip.

 

[tta1401]

After doing a little more research, I'm thinking either chip or ecm power wire.

 

[tta1401]

bump...

 

[TurboBob]

make sure the chip socket fingers are tight.

make sure there is no pressure (mechanical) on the PL board.

Bob

 

[tta1401]

I'll give'er a shot, thanks Bob!

 

[tta1401]

Posted results in another thread..http://www.turbobuick.com/forums/threads/bad-ecm.353040/page-3#post-3247168