2005 cavalier turns over wont start plugs were no good put new plugs in used dielectric grade on plugs still won't start could I have put to much dielectric grease on plug wires


Trying to start the vehicle is there spark ? Your vehicle has plugs under center of valve cover .Pull the coil pack out , get plug wire cable set and use a spark tester . Check for spark . If plugs were no good you probably fried the ICM - ignition control module . Do you know what and where ICM is ? How to Test the Ignition Coils GM 2 4L Quad 4 The amount of dielectric grease has nothing to do with it .

If you have no spark try the ignition module, it controls the spark and if you don't have any and the coil is new its the only other option short of wiring or ecu!!

Maybe the antitheft system. Read thru this link

http://vatspasslockpasskeysecurityhelp.yolasite.com/

pull a wire and ground it via useing a screw driver at the end of the spark plug boot to check for spark / if their is no spark / ignition control module / there is also a crank shaft position sensor / located on the back side of the motor under the coil packs / pain to get to / also the nuetral safty switch / to check the neutral safty switch diconnect the big harnest at the neutral safty switch put a fuse tester to the yellow wire / have someone turn the key / with the tester grounded the light should come on / now we know the ignition switch has power going through it. if there is a no power at the yellow wire / bad ignition switch / does the car have a relay located at the top of the radiator core support (up by the radiator looking down drivers side)if it does not gm will install one for free / if there is / look for the purple wire coming out of the relay and Follow it down to the starter / reconnect the neutral safty swtch / touch the small S (the smallest screw) terminal on the starter soilenoid / have someone turn the key forward check the light / this will detemine if the relay is good / CAREFULL NOT to touch the big starter wire with the little one it will jump the starter / I HAVE THE SAME CAR / Hope this helps

visually check crank sensor(common problem)
check for fuel pressure on fuel rail there is a shrader valve for that. pull a spark plug wire and confirm spark.
make sure air box isnt plugged.

if all that is good change the control module. good luck hunting


More: