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First thing's first...let's check the main connections and make sure they're nice and snug. Make sure to clean the connectors if any oil or grease residue is apparent as it can cause intermittent connectivity:

  1. 1g engine bay electrical connections
  2. 2g engine bay electrical connections

  • CAS - Camshaft angle sensor on 1g & 2g. 1g is adjustable, 2g is not.
  • CPS - Crankshaft position sensor - 2g only.
  • Spark plug wires - Check the order of the wires off of the coils to the spark plugs. The correct order is 4-1-2-3 off of the coils to the cylinders. Cylinders are numbered 1 through 4 starting from the timing belt.
  • Battery - Positive and negative cables, check for corrosion, and make sure they're tight.
  • TPS - Make sure the connection is tight. This may need to be adjusted for driveability reasons.
  • Fuel injectors - Make sure they're all snapped on to each injector.
  • All main fuses - Check all engine bay and dash fuses to ensure none are blown. If you find a blown fuse, replace it and investigate the cause of the blown fuse.
  • Coolant temperature sensor - There are two in the thermostat housing, one is for the gauge on the dash, the other is for the ECU. The ECU sensor is the two pronged one. A faulty ECU coolant temp sensor will cause intermittent start issues, or for the car not to start at all.
  • Starter - Make sure the starter relay clip is on (it's on the top, one prong) and not loose, and ensure the starter power and ground cables are tight. A good place for the starter ground is through the upper starter bolt on the bell housing of the transmission.
  • Grounds - Make sure all chassis grounds are tight, secure, and not corroded.
  • Fuses - Ensure all engine bay and under dash fuses aren't blown.
*** Now, we're going to get into the meat and potatoes ***

Check for fuel, spark, timing, and compression!!

  • If you have compression - Then you have a problem with the spark, fuel or timing.
  • If you have spark and compression - Then check for fuel and do not just listen for the fuel pump. Pull return line and check for flow. If you have flow, then spray some starting fluid or WD-40 in the intake or TB elbow (with the throttle plate open) and see if it fires.
  • If you don't have fuel out of the return line - Then check the fuel filter. If still no go, then look into replacing your fuel pump.
  • If you have fuel - Check the injectors, coolant temp sensor, and ECU.
  • If you don't have spark - Check the fuses, check the power tr module, check the CAS, and of course the ECU.
  • If you have fuel and spark - Check firing order or mechanical timing, spark plugs, coolant temp sensor (two pronged one on thermostat housing), fuses, loose connections, wires, and coils.
Firing orders can be found here:

Timing belt (mechanical timing) info here:



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