Leaderboard

I'd definitely start with a fuel pressure test. The simple presence of fuel in the line doesn't tell you anything, and due to siphoning from the tank it's expected unless you are out of gas. Pressure is what's necessary to supply the fuel to the injectors. I wouldn't spend any time or money on swapping any other parts until you are able to test for fuel pressure.

Connect a scan tool, find out what the computer is trying to tell you. "Codes" can be helpful, but the real discovery is in the data stream. Do you have an RPM signal when cranking? In ten minutes you can verify EVERY sensor except O2 which will need a running engine. In fifteen minutes. you can verify most of the computer outputs once the engine is running.. Agree on the service manual set being money well-spent. I get mine on eBay, used, at advantageous prices. Getting a fuel-pressure tester is easy. Many parts stores have a loaner-tool program. You "buy" the tool, and they refund your money when you return it. O'Reillys is good for that, but there are other stores that do the same thing. You may also want to invest in a spark tester calibrated for HEI ignitions. My favorite style is this kind. There are several brands, and it pretty much doesn't make any difference which brand you buy--IF (big IF) it's intended for HEI. Insert it into the end of the spark plug wire just like a spark plug. Ground it using the welded-on alligator clip. Crank engine. You should see the spark snap from the recessed center electrode to the edge of the shell. https://www.amazon.com/dp/B003WZXAWK/?coliid=I3S98D7T1J0RLJ&colid=2VLYZKC3HBBDO&psc=1&ref_=lv_ov_lig_dp_it

Are you a teenager? It helps to know your semi-experience. Still, you replaced the PITA GM starter. Imho, 99% of all starters SUCK to replace. So, it's good that you were able to replace the starter. A fewof things: 1) The engine will turn over if the CPS is bad. GM crank sensors are interesting. Most have 2 independent sensors. If one is bad the check engine light "should" light. In Real Life, they often become flaky and often just die, or become flaky. 2) It's unlikely that all 6 injectors clogged at once. Even with 1-2 clogged injectors, the engine should "start/catch". 3) You can go a search for: testing ignition coil "LQ1" https://www.google.com/search?q=testing+ignition+coil+"LQ1" The quotes specify that the term must appear. 4) For any sensor, buy Original GM ONLY!! Or, save yourself wasted time and money, and just send the otherwise wasted money directly to me - I take PayPal! The only reason anyone buys a non GM part is because of money! So, those companies Very Often make Cheap Junk, so that their junk parts are cheaper than the junk parts from other companies. Fwiw, back in the late 90's, for my '92 Achieva, I spent ~1 year, and replacing 4 crank sensors (CPS), before I went to my local GM dealer, and bought a sensor directly from them. That was in the late 90's. My '92 Achieva still starts and runs fine with that CPS I bought from the dealer. 5) The BEST MONEY YOU WILL EVER EVER EVER SPEND: Get the two red GM Service manuals in the picture below: Search on ebay for: 94 grand prix service manual https://www.ebay.com/sch/i.html?_from=R40&_nkw=94+Grand+Prix+service+manual&_sacat=0&LH_TitleDesc=0&_sop=15 Plus, they are dirt cheap for your car (~$25)! The Dealer Service Manuals can often go for $100+/book. 6) Neither you, nor anyone else, was born the the knowledge on how to fix a '94 GTP. That's where the service manuals, for your specific car, will really help you. There's also the forum, Google, and Youtube, Good Luck!