Thanks for Your help, and been there read that.
I also like to test the parts before changing them, but have spares for almost everything.
It would be easier if I knew what settings and range my...

That makes sense. My usb to ALDL cable has a 10k jumper pin.

I never did get my laptop to see the usb ALDL cable? My scanner adds aprox. 250 rpms while checking codes and viewing the data stream, is that normal?
My scanner requires a serial cable to hook up...

Thanks, I will get more info posted today. I didn't know what where to check at this point.
I was going to try to datalog today but cant get my laptop/WinALDL to see the WinALDL to usb cable? Do I...

Am I in the right range for TPS .63, IAC 45, MAP.67-.75? What are the bin settings and or ranges? I can't get the IAC count lower than 45 and are always 145 stopped in gear.

I got the surging to go away by unplugging the air pump and plugging its vacuum.
It still falls on its face 75% throttle to full throttle.

I got the surging to go away by unplugging the air pump and plugging its vacuum.
It still falls on its face 75% throttle to full throttle.

1227747 AMUR TBI Map surges

88 K5/V10 Blazer 5.7 tbi 1227747 AMUR
Idle and Map sensor voltage both surging.


I can and did try adjusting TPS varying from .54 to .75, the best running was...

Thanks for letting me know about picking the color, I thought it was my screen, I didn't know the default was unreadable. That explains the view reply ratio. What are the bin settings?

88 K5/V10 Blazer 5.7 tbi 1227747 AMUR
Idle and Map sensor voltage both surging.


I can and did try adjusting TPS varying from .54 to .75, the best running was around .63 however it would dive,...

I am trying to find the stock factory settings for 1227747 AMUR. I looked at the bin on tuner pro but could not figure out the operating range of each sensor. I'm troubleshooting and via my scanner...

New Fuel pump and it runs good so far. The check engine light was working yesterday when I checked the fuel pressure so I think that was a fluke think? Thanks, Chris

Help! 90 Chevy Blazer starts runs dies? Has gas to throttle body and leaving the return line on the throttle body but the injectors slowly stop spraying after going from the start position to the run...