1995 Saturn SL1 Repair Question
HELP!!!!!
Asked by yontseeAnswer
http://www.2carpros.com/articles/car-cranks-but-wont-start
Next time it refuses to start don't wait for it to make up its mind-do below immediately to determine if its fuel or spark problem
Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing
I can hear the fuel pump come on, even when it's stalling.
Check everything I've suggested-Try cleaning out the idle air control valve and see what happens
Just to add to this one you said you changed the coolant temp sensor did you change the top one with one wire or the bottom one with two wires?Have you checked for trouble codes in the computer yet?That could even lead you to your problem.
It was the top sensor, but do you know what the lower sensor is for? The only code I got was a 45 (running rich). I have changed the o2 sensor off the manifold about year and half ago.
I still have not checked the pressure, don't have a tester.
You changed the wrong sensor the coolant temp sensor is the bottom sensor with two wires going to it.The top one is for the gauge try changing thr bottom one.Also inspect the connector going to it if the terminals are green or blue you will have to replace the connector also.That could be your problem a bad coolant temp sensor.