I changed the crank shaft position sensor.

 

When it was running while I was driving it the rpms would drop then shoot back up causing it to jerk quite often and when idling it would occasionally stall. I don't know if that changes anything but I'm not sure where to go from here. I really appreciate all the helpful advise so far thought thank you.

 

Don't care TEST it. New aftermarket sensors can be bad right from the get go. I would also test all of the other sensors as well to make sure they are all good. Not to mention all grounds as well.

 

No argument with checking the CPS at any time. Since it only takes three minutes I'd check it if my radio wasn't working! Also I'd do Cruisers sensor ground test found in my Signature.

You have a crisp blue spark and she won't fire? Try starting fluid. Is it even chugging or popping?

Edit: I was on the wrong page. Still check the MAP tube. After the CPS, ground test, and MAP tube, I'd check the TPS.

One reason for a no start with spark, compression and fuel is being flooded. After cranking you can pull a plug and see if it's wet. The Map, its wires and tube might be a suspect>>>

There is a brittle little tube. It comes out of a rubber plug, low on the engine side of the throttle body. It runs back to the firewall, then up to your MAP sensor sort of high up there near center on the firewall. CRUCIAL!! The MAP will tell the ECU to dump fuel with less/no vacuum. Any crack or blockage and it will be pig-rich. (black smoke, fouled black plugs). You can pull the line off the MAP and feel for vacuum with your finger. If it runs!

 

What about spark at the plug just because its going into distributor don't mean its coming out.

 

And checking fuel pressure by estimating a "squirt" is not accurate. A gauge must be used.

Try a spritz of starting fluid in the throttle body and see what happens.

 

Now I'm all for testing fuel pressure via a gauge, but my thoughts make me want to ask this.....OP try starting it with your foot on the floor....or starting fluid, either or

 

I agree totally.

 

Ok so I was looking for my map sensor and I can't find it but I tried putting a splash of gas and by splash I mean a Gatorade bottle cap full, into the air manifold ( I'm not good with all the engine parts but I think that's what it's called. It's teand it fired up for about 3 seconds. Now what should I do?

 

Find out why your fuel pump or injectors aren't working.

Got a voltmeter?

Check the input and output voltage of the fuel pump ballast resistor.

 

I'm getting a reading of between 200 and 250 dc

 

In this picture, the MAP sensor is highlighted in RED and the vacuum line that connects the MAP sensor to your throttle body is YELLOW.

 

Set your meter for 20 V DC. (DC might have a little straight line, (AC is wavy))


The input on that resistor is on the front, output is the rear.

 

Thanks. I just looked up how to test them and it seems like I need a volt metre and a vacuum pump. Is that the easiest way to test them? I'm also going to test the fuel pressure while I'm at it which will be tomorrow as I have to buy a fuel pressure tester and a vacuum pump.

 

That makes no sense. Should be 12 to 13 volts DC on one side and about 10 on the other side.