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740 Regina codes and oddness? LONG post 700

uid 34776's pic
posted by  Ryan_R on  Tue Jan 19 05:16 CST 2010
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last visit: Tue Sep 24 13:46 CST 2013
[RELATED]


Definitely replace the crank sensor.

It also sounds like it's running very rich. I'd check the fuel pressure regulator, MAP sensor, and coolant temp sensor. That the problem occurs at start up and a idle, but not on the highway, makes me think that the O2 sensor is OK.

Fuel Pressure Reg: check for fuel in the vac hose. A non-turbo LH 2.4 Regulator works just fine with Regina. Dirt Cheap, too.

Coolant sensor can be tested with an Ohmmeter.

The MAP sensor is a dirt cheap GM part and used on early-90's V6 cars. Check the FAQ for the Delco number.

-Ryan


--

Athens, Ohio
1987 245 DL 324k, Dog-mobile, E-codes
1990 245 DL 137k M47, E-codes, GT Sway Bars, GT Braces, Dracos
1990 744GLE 189K 16-valve project
1991 745 GL 304k, Regina, 23/21mm Turbo Sway Bars






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