crank crank crank no start helppp!

whats up. so it drove well forever, an lately(for a week) its been taking a while to start. an now it just wont start.
i replaced fuel filter an nothing an it has proper fuel presure.
replaced valve cover since the oil well were full of oil. could that of hurt something?
what sld i do next?
please help!

When you turn the key what sound(s) do you hear?

Fuel pump?

Engine turning over?

Starter engaging?

Starter clicking repeatedly?

Starter just clicking once?

No sound at all?

the engine will turn over buhb wont start. an yeah the fuel pumps coming on i replaced the relay just to be shure

First off, check your battery terminals for corrosion and tightness.

Then I'd test your battery, fuel pressure (you can by a fuel pressure gauge from Harbor Freight for ~$20), then we'll get into testing for spark.

ive tryed two different batterys (stole the battery frm my jeep)an cleaned terminals, allready tested fuel pressure an replaced fuel filter :/

Crank or cam position sensor. It's not firing the plugs or the injectors or both.

Do u think it could be the mass air sensor?

Unplug it and find out.

unplugged it anstill didnt wanna start just turning over an not firing how do i read the check engine light ?

Originally Posted by motorthrill

unplugged it anstill didnt wanna start just turning over an not firing how do i read the check engine light ?

OBD1 cars, get a PEAK Sensor for OBD1 cars

OBD2 cars, go to Advanced Auto and rent the scanner. Bring it home, plug it in, turn key into the on (don't start) position, scan.

Sounds like a Crank Position Sensor or Crankshaft Position Sensor. But I am just a keyboard mechanic.

i have an obd1 reader that ived used in my jeep an mustang, buh i cant figure out where to plug it in at. i saw a round plug in spot under the hood is that it? where can i get the adapter



an again thanks for all ur help guys!

Originally Posted by motorthrill

i have an obd1 reader that ived used in my jeep an mustang, buh i cant figure out where to plug it in at. i saw a round plug in spot under the hood is that it? where can i get the adapter



an again thanks for all ur help guys!

I don't know if all OBD1 scanners are universal.

where is the crank or crankshaft sensor located how do i replace it?

Well, might wanna check the camshaft position sensor as well. Here are vids:

Camshaft position Sensor


Crankshaft Position Sensor (If you have a lift, it will make life easier).

so i replaced the crankshaft sensor an now it runs!! yay!!! buh it will idle normal then it will start to die then rev up an start to die an rev up
what could cause that

Vacuum leaks. Dirty MAF, Dirty ICV.

How do i clean those? Like will carb cleaner work

Absolutely NOT for the MAF!!!!!

Use an electrical contact cleaner for the MAF, (Or specific MAF cleaner). aYnd you can use Carb cleaner on the ICV.