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DieselSJ · 09-25-2018, 04:34 PM

Have you done any data logging at all?

Here are a couple great videos that can help with diagnostics. While these are based on later systems, the basics still apply with the STFT and LTFT and using them to determine where your issues are.

https://youtu.be/5WnM_NsOtd8

https://youtu.be/cARQ0jZZ4Qc

What do you hope to accomplish with the TB swap? You are throwing unknown quality used parts into a system that already has issues.

09-25-2018, 04:34 PM	#2
DieselSJ Registered User Join Date: Jun 2016 Location: Phoenix, AZ Posts: 574	Re: 1988 TBI to 1991 TBI Conversion Q's Have you done any data logging at all? Here are a couple great videos that can help with diagnostics. While these are based on later systems, the basics still apply with the STFT and LTFT and using them to determine where your issues are. https://youtu.be/5WnM_NsOtd8 https://youtu.be/cARQ0jZZ4Qc What do you hope to accomplish with the TB swap? You are throwing unknown quality used parts into a system that already has issues. __________________ 87 R30 CC Dually, TBI 454, NV4500, zero rust barn find 87 Jeep Grand Wagoneer, 6.5 turbodiesel, 700R4