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Disconnect the MAP sensor's electrical connecter. Connect one jumper wire between the connector and the MAP sensor's terminal "A". Connect another jumper wire from the connector to terminal "C". Connect the positive lead of a digital voltmter to terminal "B" and the negative voltmeter lead to a good engine ground. Turn the ignition to on and observe the voltage. If the reading is between 4 to 5 volts (2 to 3 volts for turbo charged) then the sensor is working fine at this point. Now, make sure the vacuum line is in good shape and doesn't have any leaks. Start the engine and let idle. The vacuum of an idling engine should pull the voltage down to around 1 or 2 volts. This test lets ya know the sensor is responding to vacuum. Are you getting a 33 or 34 error code? Replace if needed. My MAP on a 92 safari costs me $51 after tax from Orielly's. This test is cheaper to do.
What else can I help you with?
How do I do an on board diagnostic test for a 1995 GMC Safari Van?
Use a code reader. You can get it scanned at most chain autoparts stores for free.
What is the firing order for a 4.3L 1995 GMC safari minivan?
1,6,5,4,3,2
Fuse box location in GMC safari 1995?
A GMC Safari is one of the vehicles that installed their fuse boxes under the hood. To open it squeeze both sides.
Where is the throttle position sensor on a gmc safari 2000 van?
The 2000 GMC throttle position sensor can be found on top of the engine. The throttle position sensor will be near the injector fuel pump.
What is the weight of a 1995 GMC Safari van?
curb weight is 4068 pounds
Where is the coolant temperature sensor on a 2003 Chevrolet Astro Van?
Where is the coolant temp sensor on the 1998 gmc safari awd
Why does your battery in your 1995 gmc safari drain in a matter of hours?
I have a 1993 gmc safari and after getting my fuel pump installed. Something is draining the battery. What could be drainin the battery?
Diagram of a 1995 GMC Safari Van Firing Order?
advanced auto parts web site has the diagrams for the firring order for GMC Safari vans. firring order is 1,6,5,4,3,2
Where is the crankshaft sensor for a 1995 gmc jimmy?
The crankshaft sensor is by the crankshaft pullie (the balancer)
Where is the knock sensor located on a 2002 GMC Safari?
behind left valve cover should be round
Where is the brake light switch located on a 1995 GMC Safari Van?
Above the brake pedal.
How do I test crankshaft position sensor on 2000 gmc safari van?
You would need to scope the signal, using a scanner tool with a scope function. With this you can look at the signal to the ECM while cranking the engine.
