I’m running Windows 7 on an lenova IBM Thinkpad.

PS. My Win ALDL only registers 5 rows of info, no “dashboard “ , so my computer set up seems a little suspect
Any suggestions for future...

Closing the loop here.....
I’m happy to report that my truck is successfully back on the road and idling well.
The pickup coil was apparently the root cause, I threw in a new ICM while I was in...

Ya sbnova.....I’m thinking the pickup coil is the root cause
My replacement is coming in the mail
I tried downloading Tunerpro with a bypass of my antivirus, it still has bad dll files and won’t...

TBI throttle shaft felt good to me, no rebushing done
14 psi spring is in use
Delco CR43TS plugs look fresh & clean, .035 gap
Idle speed set properly, base timing set, new TPS adjusted
I still...

Ya, I replaced the original ICM in May 2020 with Standard Motor Products ICM. Apparently, and coincidentally, this replacement failed when I plugged in my ALDL cable (with 10k resistor).

Now I...

Problem: stalls out at idle consistently. Worse when hot, I can barely keep it going in neutral at a stoplight with the two foot driving method. Lately it’s gotten progressively worse, it feels...

Of course you guys are correct as usual, my cable does have the 10k resistor. So I remove it and can see a few rows of data in WinALDL.
Where should I focus on the data to cure my original stall...

PS. My IT guy (son) says we tried to download Tuner Pro off the internet, but our antivirus did not like it.

It also showed “missing DLL” errors.

Ya, the pick up coil to ICM was loose on the swapped in ICM
No continuity between A & B terminals on the data cable.
Is Tuner Pro the best software for my application?
It seems like my truck is...

OK now, my no start is solved thanks to the Forum telling me where to focus! Woo Hoo!

I went back to check the Pickup coil and found the red connector to the ignition module loose (which I...

Dielectric grease in place, I have not checked the pick up coil (yet).
I do not hear the fuel pump with the key on.
Check gauges & check engine lights stay on.
Fuses are checked good
Ran the...

No spark
No fuel
Good Ignition module

The only thing I changed in an attempt to tune my rig was connect a cable & computer and the result was quick and obvious (to me).....no start.

Could an EBay cable & software take out my...

Thanks for the prompt reply Dave,

I just swapped out the ignition module (I had installed a new one in May 2020).......sadly still no start.

Bob W

Thanks in advance for any help.....did I fry my ECM?

88 GMC

I have a 1988 GMC Sierra 1500 truck with a stock 1227747 ECM that now won’t start.


Here’s the problem, I was trying to solve a progressively worse idle/ stall situation:




Tried to...

I’m an old guy with an old truck seeking help to solve a new problem.

Bob W