The onboard computer constently moniters engine systems such as EFI, (electric fuel injection) from input of all of the sensors on the engine, ie; O2 sensor and automatically makes changes to the fuel & ignition system. Some vehicles have an adjustable fuel pressure regulator however the fuel pressure must be checked to see if it is within manufacturers specs. To answer your question there are no adjustments. If you are having a driveability problem then the vehicle needs to be diagnosed with a scan tool. This will show where the problem is. In most cases a malfunctioning sensor is the culprit.
Behind the grill
tRe dleplace IAC Valve
When making any changes to a car, it is important to have a diagram for a guide. A diagram for a 1987 GMC Jimmy vacuum hose system can be found in its manual.
what is it that you need to know about it?, I have a 1989 GMC Jimmy 4.3L, if the system is the same then I can help a bit, doing some work on it at the moment, replacing the pump.
The 1997 GMC Jimmy tension bar has adjustment nuts on both ends of the tension bar. Turn the adjustment nuts to lengthen or shorten the tension bar distance.
You must remove the entire interior dashboard..
no timing belt on a GMC Jimmy
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I don't have a 99 GMC Jimmy
where is the oil pump on a 1998 gmc jimmy in the oil pan.
should be a small lever (very easy to see) on the left side of the column behind the indicator, pull it towards you and adjust the tilt.
YES, They are the same engines. There's NO difference what so ever.
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spark plug gap for 1994 gmc jimmy
should be..... a jimmy is a blazer with a GMC label on it
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I need to know how to replace a heater core in a 1992 GMC Jimmy?
If you are putting EFI/or efi engine in a GMC pick up that came with a carburetor you will need to run a KOEO relayed power supply line to the new fuel pump.