no spark. help me trace prob
12-18-08, 01:22 PM
#1
mattg prob nt coming back
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no spark. help me trace prob
hey everyone. i have no spark going to the coils and i have no idea why. i have a multi meter but im not sure what readings or settings im supposed to see or use. someone please walk me through it so i can see whats wrong with my car. thanks
Gabe
before i forget. its a 88t2 with no emissions stock everything else. thanks
Gabe
before i forget. its a 88t2 with no emissions stock everything else. thanks
12-18-08, 04:37 PM
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Make sure both EGI fuse are good in the engine bay.
Make sure the ENGINE fuse is good in the interior.
IF good, then pull the MAIN RELAY's small plug off, the two wire plug. Then put the key to ON. Leave it ON and now put that small plug back on the MAIN RELAY. The relay should click when you do do. (proves the Engine fuse is good)
Or install the jumper in the yellow fuel pump check connector. Then put the key to ON. You should hear fuel passing thru the fuel rails constantly or hear it splashing in the fuel tank constantly. (Proves the ENGINE fuse is good).
Or pull the black plastic cover off the LEAD coil assy to expose the two wires attached to the coil itself with two small nuts. Neg meter lead on the batt neg post...positive meter lead on either of the two nuts on the coil assy. Meter on dc volts. You should see batt voltage. (means one EGI fuse is good and the Engine fuse is good).
Now pull the any of the solenoid electrical connectors off (colored Blue/yellow/grey/orange/green. Put the meters neg lead on either the batt neg post or the case of the alternator and the positive lead touching the Black/White wire in any of those connectors. Meter on dc volts. You should see batt voltage. (proves the OTHER EGI fuse is good).
Any and all the above should give you clues as to what is wrong.
Power goes from one EGI fuse.........to the Main Relay.....on to the coil assy's to provide power to them.
Power goes from the other EGI fuse........to the Main Relay.........to the ECU to power the ECU so the ECU can trigger the coils to fire the sparkplugs.
Power goes from the Main Fuse .........to the ignition switch........to the interior fuse box.......to the ENGINE fuse..........to the Main Relays coil.......to pull the main relay in to feed power from the EGI fuses to the items mentioned above.
So that's why you look to make sure the two EGI fuse are good and the ENGINE fuse is good.
There's no order to the above. Do any or all. If something does not happen as described, then you have a clue.
Make sure the ENGINE fuse is good in the interior.
IF good, then pull the MAIN RELAY's small plug off, the two wire plug. Then put the key to ON. Leave it ON and now put that small plug back on the MAIN RELAY. The relay should click when you do do. (proves the Engine fuse is good)
Or install the jumper in the yellow fuel pump check connector. Then put the key to ON. You should hear fuel passing thru the fuel rails constantly or hear it splashing in the fuel tank constantly. (Proves the ENGINE fuse is good).
Or pull the black plastic cover off the LEAD coil assy to expose the two wires attached to the coil itself with two small nuts. Neg meter lead on the batt neg post...positive meter lead on either of the two nuts on the coil assy. Meter on dc volts. You should see batt voltage. (means one EGI fuse is good and the Engine fuse is good).
Now pull the any of the solenoid electrical connectors off (colored Blue/yellow/grey/orange/green. Put the meters neg lead on either the batt neg post or the case of the alternator and the positive lead touching the Black/White wire in any of those connectors. Meter on dc volts. You should see batt voltage. (proves the OTHER EGI fuse is good).
Any and all the above should give you clues as to what is wrong.
Power goes from one EGI fuse.........to the Main Relay.....on to the coil assy's to provide power to them.
Power goes from the other EGI fuse........to the Main Relay.........to the ECU to power the ECU so the ECU can trigger the coils to fire the sparkplugs.
Power goes from the Main Fuse .........to the ignition switch........to the interior fuse box.......to the ENGINE fuse..........to the Main Relays coil.......to pull the main relay in to feed power from the EGI fuses to the items mentioned above.
So that's why you look to make sure the two EGI fuse are good and the ENGINE fuse is good.
There's no order to the above. Do any or all. If something does not happen as described, then you have a clue.
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