What do I replace when a code 11 is sensed on my 91 B250 318

ever get a tune up.?
ever scan it?
the above code makes no sense.

For code 31 you probably will need to replace the EGR valve and PFE sensor. (PFE sensor screws onto the EGR valve)
Code 41 and 91 is for the drivers side hego sensor (oxygen sensor in the exhaust) Replacing it will probably fix both those codes.

This trouble code sets when the Powertrain Control Module (PCM) tries to regulate the generator field with no result during monitoring.
The PCM tries to maintain a system voltage between 12.9 volts and 15.0 volts. The voltage determined by the PCM as the final goal for the charging system is called "control" voltage. This control voltage is determined from the battery temperature sensor for ambient sensor and the sensed voltage system voltage at PCM pin #11.
The control voltage is compared to the sensed voltage continuously during running. If the sensed voltage is less than the control voltage, the PCM will supply more ground to the field circuit. If the sensed voltage is more than the control voltage, the PCM will supply less ground to the field circuit.
There are three possible causes for this, the field driver circuit open or shorted, there is an alternator internal open or short os a PCM failure

Check the help link related to Acura car models:---



How to Clear OBD error Codes on Acura Car Models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-clear-obd-error-codes-on-acura.html

Diagnosis and Testing Car Components?

http://vwrepairhelp.blogspot.com/2011/11/diagnosis-and-testing-car-components.html
Diagnostic Trouble Codes list for Acura Car Models?

Part 1.

http://repairhelpcenter.blogspot.com/2011/11/diagnostic-trouble-codes-list-for-acura_18.html

Diagnostic Trouble Codes list for Acura Car Models?

Part 2.
http://repairhelpcenter.blogspot.com/2011/11/diagnostic-trouble-codes-list-for-acura.html


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Underhood components http://www.howtorepairguide.com/2012/11/lincoln-underhood-components.html

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How to replace Power Rack and Pinion Steering Gear on Acura Car Models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-power-rack-and-pinion.html

How to replace Power Steering Pump on Acura Car Models?

Also bleeding:

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-power-steering-pump-on.html

How to replace Steering Linkage on Acura Car Models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-steering-linkage-on.html

How to replace Steering Wheel on Acura Car Models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-steering-wheel-on-acura.html
How to replace Power Steering Pump on 1999 Acura TL? http://howtobyme.blogspot.com/2011/11/how-to-replace-power-steering-pump-on.html

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How to Test and Replace Fuel Injectors on Acura Car Models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-test-and-replace-fuel-injectors.html

How to replace Fuel Tank Assembly?

http://vwrepairhelp.blogspot.com/2011/11/how-to-replace-fuel-tank-assembly.html

FUEL LINES AND FITTINGS on Acura Car Models?

http://repairhelpcenter.blogspot.com/2011/11/fuel-lines-and-fittings-on-acura-car.html

Replacing Fuel Charging Assembly on Car?

http://vwrepairhelp.blogspot.com/2011/11/replacing-fuel-charging-assembly-on-car.html

Intermittent Charging Problem with Engine warning Light?

http://whoisbyme.blogspot.in/2012/07/intermittent-charging-problem-with.html
How to replace Fuel Pressure Regulator on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-fuel-pressure-regulator.html

How to test Fuel Pressure and replace Fuel Pump on Acura Car models? http://repairhelpcenter.blogspot.com/2011/11/how-to-test-fuel-pressure-and-replace.html

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These will help.
Thanks.

You use premium gas in a TDI? Run that by me again? A TDI is a diesel engine car. What don't I understand here? I'm not being a smart __s but this just does not make sense. If you have put gasoline in a TDI, DO NOT DRIVE IT. Tow it to a dealer.

• 11 No ignition reference signal detected during cranking (bad Hall effect) OR timing belt skipped one or more teeth; OR loss of either camshaft or crankshaft position sensor. Can cause the engine to stop working entirely with no limp-home mode.

When you replaced the pump, did you replace the hose between the pump and the sending unit? Check the fuel pressure. It should be 11-13 psi.

I don't know what you got there, but, the marks are just dots, or little arrows, they have to line up or else. I don't think the cam can go in but one way, all 4 valves opening at once doesn't make sense to me but I'll check it out.

you need to loosen the alternator bolts then turn the bolt under the alternator to relieve tension on the belt