2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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s4 ?s5 fuel pump?

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Old 08-24-06, 01:49 AM
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Rotary Freak

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s4 ?s5 fuel pump?

so filters werent the problem...im lookin to replace my fuel pump, is there a difference between s4 and s5 pumps? or are they interchangable?91 na
Old 09-03-06, 07:39 PM
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i think the wiring may be diffrent but they both drop in
Old 09-03-06, 07:51 PM
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No idea, but I have a good fuel pump from a 91 NA for sale. PM for details.
Old 09-07-06, 07:13 AM
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S5 -> S4 with a little lengthening of the hose.
You cannot go backwards.

The S5 fuel pump assembly bracket uses a special rubber(?) flex fitting that fits snugly on top of the fuel pump.
The S4 fuel pump output fitting is too long to fit correctly.


-Ted
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