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Code 51 and code 42

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Old Mar 4, 2001 | 02:27 PM
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Code 51 and code 42

I've been getting code 42 (electronic spark timing) and code 51 (prom error). I had a friend of mine modify my aftermarket chip. Could this be the cause? The car is running very poorly and dies on me.

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91 Formula
305 TPI 5speed
1LE/G92/WS6

Paxton SN92 polished kit, SLP airfoil, ported/polished plenum, March pulleys, Crane AFPR(43psi),Crane Gold 1.6rrs,MSD coil,MSD6AL (5275rpm limit),Holley 9mm wires,Ac delco R43ts plugs,fastchip,Ford SVO 24# injectors,Bosch O2sensor,SLP 1 5/8" headers,SLP catback,shortened shifter,3:73s w/Auburn posi,170* t-stat,JET 195* fan switch, Macewen white face gauges, Autometer gauges, Zoom hi-performance clutch.
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