97 cherokee has spark has fuel at the rail replaced cps still nothing. I noticed that if I prop the throttle open all the way it tries to start like it wants to pop off but won't, it won't start with starting fluid either, all the gauges work no check engine light good compression, giving me a headache! Help please!
You mentioned it has spark, but does it have GOOD spark. You must have a snapping, BLUE spark to start the engine. White/orange/yellow indicates a weak spark which is not likely going to start the engine.
A weak spark is usually caused by a faulty ignition coil. The coil can be tested for both primary and secondary resistances with a manual and a meter.
Good luck and keep us udpated!
99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche Without "data", all you have is an opinion!
All new cap rotor plugs wires coil pickup plate, pulled all the plugs out and cranked it around to blow out any fuel, starting fluid in the cylinders, haven't checked fuel pressure yet but I pushed the needle in on fuel rail and sprayed out really good
I am sure someone will correct me if I am wrong but when you hold the pedal to the floor you are cutting off the fuel pump. On the old carb vehicles you used to have to do this when they flooded.
Pull the plugs and let it air out overnight. It's probably so wet in there that's why it won't start. I have never sprayed starting fluid in the cylinders directly, you should only need to spray it in the air inlet.
Im giving you the easy free things to check.still do it. Another free thing to try it this.
Get in jeep. Turn key to accesory. Don't start. Turn key off. Turn to accesory again. Let the fuel pump prime three times. After that then start. If jeep starts you may have a bad check valve. These are the free things to check. Im still leaning towards TPS so test that
01' Limited I6, C8.25, D30, NP231, 3" Zone AAL Lift, Extended Shackles and relocators, Hella H4 E-code headlights w/ HD Wiring Harness, Fully Swayless, Front JKS Disco'd when needed, 60mm Bored TB, IRO LCA, Rear Disc Conversion