'97 grand am 2.4L no start location of crank sensor

[deanr221]

i have a 1997 grand am 2.4L with a no start condition...changed fuel filter (original) no change....read po335 &po121 codes...car will start briefly with starter fluid...should i change the crank sensor and if so where the heck is it located...also is it possible i just have bad gas (my 16 yr old sons car...likes to run it just above E)also,i wanted to check fuel pressure but can't find tap...would have thought for sure there woul be one on amulti port engine....thanks to anyone who can steer me in the right direction.......just a followup...my son 'fessed up to mistakingly adding kerosene in gas tank...bled tank down,filled with new gas and a little sea foam additive....back in business...teenagers

[GTP Dad]

If the car will run on starter fluid then you have a fuel problem. It sounds to me like you either have a problem with the fuel injectors not firing or the fuel pump is bad. My guess would be the fuel pump is not working and will need replaced. I would try the fuel pump relay first as it is much cheaper and easier the change but if that doesn't work the fuel pump is the next step.

The codes you indicate are for a throttle position sensor and a CPS. The CPS on the car is located on the front of the engine above the oil filter.