New and need help PLEASE

[Thatguywins1]

There is a listing for traction control TPS at RA. There is also known problems with the wiring harness to the TPS. The engine swap include using the old TPS?

Yes only because the donor motor had a cable throttle body

 

[Thatguywins1]

So, if I understand correctly, you replaced your LM7 with another LM7. True? And the new engine is from what year?

Did you use your original throttle body and throttle cables, or do some kind of a modification?

The engine came out of a 2001 Chevy Silverado. Yes it was an LM seven with 160,000 miles on the engine. I did use my throttlebody because mine is drive-by pedal. No modifications were done. I can show you the difference in throttle bodies

 

[Thatguywins1]

 

[Thatguywins1]

the one that came stock on my truck is different uploading photo now

 

[Fless]

What parts from the old engine were put on the replacement?

Or, if too many, what parts on the new block were retained?

 

[Fless]

No need to show us the diff between throttle bodies. You would need to use your cabled one, we get that.

 

[Thatguywins1]

 

[Thatguywins1]

What parts from the old engine were put on the replacement?

Or, if too many, what parts on the new block were retained?

I put brand new knock sensors with harness valve covers with gaskets plugs and wires brand new only thing that came over to this engine was the throttle body

 

[Thatguywins1]

OK so as soon as the engine is started, the engine immediately goes to like 3800 RPMs and balances back-and-forth from 3800-3700-3800 for 10 to 15 seconds, and then the RPMs drop way way low to the point to where it struggles to stay running for 5 to 10 more seconds until it dies

 

[Fless]

Well, I'd recommend looking at some live data. Just a guess, but you may have a MAF that's over-reporting, or a coolant temp sensor that's dead or mis-reporting. Those aftermarket intakes can cause issues, too, with unreported air (as in a disconnected or unsealed vacuum hose).