Cranks but won't fire, Neutral safety switch?

[UNCC_99XJ]

just wanted to post about the electric fan coming on w/ ignition, I have a sticker on the top of my fan on my 99 that says "warning, fan my come on at anytime when ignition is on"

Just thought i'd pass that along....

 

[LynchMob]

CHECK THE CPS WIRING HARNESS and CONNECTION BEHIND FIREWALL.

I had the same problem. Previous owner replaced the CPS twice. It would work for a little while then act up again. The problem was not the CPS but the WIRING HARNESS and also a hidden CONNECTION just a little further along behind the firewall.

It would somethimes start fine; other times it would just crank and crank. I first hardwired the main wiring harness to the CPS (driver's side near valve cover - the one you disconnect the wire end of the CPS from) which I thought fixed it. It helped but would still occasionally decide not to start...so I'd pull and tug and move crap around and that would sometimes fix it. I then followed the wires to the firewall, pulled the grommet and low and behold another connection...looked like some mickey mouse job...clear connectors that had all corroded over. Hardwired this and I haven't had a single no start since (over 6 months ago).

Good Luck