2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Can you use a NA AFM in a TII?

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Old Jul 20, 2002 | 07:16 PM
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chris_stampe's Avatar
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Question Can you use a NA AFM in a TII?

Can you use an NA's Air Flow meter in a Turbo II? Will it have any ill effects? Thanks,
Chris
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Old Jul 20, 2002 | 11:47 PM
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They're externally identical, but have different part numbers. This almost definitely means they're calibrated differently (different spring rate) to suit the Turbo's higher airflow, so they're not interchangable.
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Old Jul 21, 2002 | 01:07 AM
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really, wow I was going to swap my 88 TII, with my 89 gtu, that useful.........
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Old Jul 21, 2002 | 01:49 AM
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The 86-88 style and 89-91 style are WAY different...it is possible to make the swap, but there's a lot of guesswork and wiring changes to make it work for minimal gain.

There are basically at least 3, if not 4, airflow meters for 2gens...86-88 NA, 87-88 t2, 89-91 NA, 89-91 t2(dunno if those 89-91s are truly different or not). I have used a NA afm on a t2 with no ill efffects. IM not saying theyre the same, IM not saying theyre different, Im just reporting my results of use.
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Old Jul 21, 2002 | 09:05 AM
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If you look at the AFM testing procedures in the Fuel and Emissions Control section of the appropriate Factory Service Manuals, you will see that the NA and TII AFMs are not the same, and the S4 and S5 are not the same.
http://fc3s.org/
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Old Jul 21, 2002 | 10:15 AM
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Anyone have an s4 TII afm for sale?
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Old Jul 22, 2002 | 08:39 AM
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i have an 88 t2 afm
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Old Aug 11, 2002 | 05:47 AM
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why bother? are you also upgrading your fuel sytem?
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