GM Service Manual Online
For 1990-2009 cars only

NEW DIAGNOSTIC FUEL PRESSURE GAGE PART NUMBER

Model and Year: 1990 W CAR WITH 2.5L (VIN CODE R) ENGINE

When diagnosing fuel pressure on the 1990 2.5L (VIN R) "W" engine application, use TBI pressure gage modification kit Kent-Moore J 29658-100. The kit includes a 414 kPa (60 psi) gage head and instructions to connect it to the TBI fuel pressure gage J 29658-B. Normal operating fuel pressure for this engine is 179 to 220 kPa (26 to 32 psi).

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