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Mechanic I used said it didn’t matter if it’s on the frame, & I’ve had no issues in the year since. Before I put new ground cables, both were broken & gave me no issues for years. When I had my engine replaced the mechanic at the dealer put ground from the block to the frame, but it was a dinky wire that I had replaced with a better one.
Your mechanic doesnt understand obd1 gm tbi.
Which is no big surprise at all..
An anceint rather short lived tech that never got passed on because of the microfiche to early document scanning transition to document imaging storage
A lot of mid 90s tech and its documentation is lost.
There was this big rush to digitize everything back then.
And they did.
And it was all done in feeble rapidly deteriorating formats that are essentially unreadable now.
We have the disks and the drives.
We just dont have a way to read them.
I can barely figure out how my friggen phone works.
I have no idea what any of you young people are talking about when it comes to computers.
None.
But I am probably one of the last people left who can program a tape reader Fanuc controller in HPGL or DXF and Im sure as hell the last guy who can run Prippet for Strippets
Since I stole the last copy of it
And the only reason that that is worthy of note is because we have some old aircraft and they need parts.
And now everybody is ancient or dead.
I know this has nothing to do with anything but Im rolling so Im gonna tell a story anyway.
Back not so long ago, back in the mid 90s.
We were all masters of our craft.
Aerospace prototype mechanics.
A guild of talented professionals.
And we built some crazy ****.
MX missiles , Tank armor, Bullitt proof cockpits.
We flew airplanes into mountains just to see what happened to them.
We shot frozen turkeys into a running ge jet turbine
And all of that is gone.
All of that generational knowledge and skill is gone.
What a lucky man I am.
To be in the right place at the right time and be smart enough to shut up and soak it all in
Thats my rant
If you changed the ground from the head from firewall to frame that can cause a ground loop that ultimately will cause a Ground Plane issue and could lead to a fireo