No injector pulse

gunslinger

Member
Car was running fine. I stopped to get some breakfast, and it wouldn't start again
Have spark, no injector pulse.
Have cam signal at ECM, have crank signal at ECM, no injector output.
Does the injector driver signal go through the powerlogger?
I'm heading home now to pick up a spare ECM, but I'm going to have to swap the PL back into it.
Could the PL be bad? I can monitor data through my laptop, and there is no RPM data when cranking.
 

aminga

Chicks Dig the powerbulge
No start - no spark, has injector pulse - Check the ignition module (also check the CCCI and ECM-IGN fuses)
No start - has spark, no injector pulse - Cam Sensor or ECM
No start - no spark or injector pulse - Crank sensor or module
 

gunslinger

Member
I just swapped my TT5.6 chip back into the ecm, and the car runs. Now I have to convert it back to MAF to get the car home.

Did the SD2 chip fail, or did the PL fail?

Eric?? Bob??
 

DavzGN

Well-Known Member
Do you have a map reading on PL? That is a key value to calculate fuel on the Sd2

Posted from the TurboBuick.Com mobile app
 

TurboDave

RIP DAVE
Staff member
TurboBuick.Com Supporter!
Like what has been said in both your threads, CHECK your MAP signal. KOEO, what's you map reading?
 

Pronto

Believe nothing you hear and half of what you see.
Another thread had similar issues and it was a bad ground to the MAP...
 

gunslinger

Member
KOEO MAP is 99kpa. At startup at high idle it drops to 44. Map seems to be working.

Posted from the TurboBuick.Com mobile app
 
Last edited:

Pronto

Believe nothing you hear and half of what you see.
Maybe try the PL on the spare ECM with the old chip?
 

gunslinger

Member
Maybe try the PL on the spare ECM with the old chip?

That's what it's running on right now.
If I put my SD2 chip back in, it doesn't run.
Powerlogger seems to be working fine. I suspect it's an issue with the chip. Or a setting in the chip.
 

Pronto

Believe nothing you hear and half of what you see.
At least it's running! That must have sucked yesterday.:oops:
 
Top