Hey all you supra lovers, my '87 N/A blew a head gasket back in july, so i just finished up putting a new headgasket in and when i went to start it up it cranked over just fine but would not start (keeping in mind the car ran just fine before i took it apart). it seemed like it BARELY wanted to but nothing. i checked for spark and it was good, i checked the fuel pump thru the diag. port and i could hear it whining, i even cracked the fuel line in 2 spots on the rail and fuel was dripping out so i dont think its a fuel issue. i also double checked my timing belt to make sure it was on, the only thing i didnt check for timing was the distributor's rotor position which i may check tonight. next i used a noid light on the injector to see if it was pulsing and it was not, i checked 3 injectors that u can easily access and nothing, so i hooked up a simple test light and check for power at the injector plugs, i found that the test light lit up when i touch both wires on the plugs, i thought that one was power and the other was ground that went to the ECU, so that threw me off a bit, any info on that would be appreciated too... from there i checked all the fuses related to the EFI system (AM1, AM2, 15A EFI, 7.5 IGN) i also check the main relay and when i hooked a jumper wire to it i could hear it click on and off.
my thoughts on this is that the injectors are not getting a signal or something within the system is not properly grounded. i checked the ground wires on the intake manifold above the starter, there were 5 wires (i believe a few were white w/ red stripes, and the other few were brown) i used a DVOM and checked resistance from the grounds to the battery and theres was very little. i also made sure no connectors were bent going to the MAF, Distributor and injectors. i check the ohm readings on the distributor plug terminals, like the haynes manual shows (between terminals G1+ and G-, G2 and G-, and Ne+ and G-) all had readings so i figured it was ok..
any ideas? is there anywhere else i can check, or double check my work? where does the injectors get its signal from? i dont believe the N/A 7m's had any CPS. where are the rest of the grounds for the ECU?
by the way all i did differently when finishing the job was rerouting the vac lines because they were all screwed up from the previous owner.. what a jackass.. i got a diagram from my work off mitchell and from the haynes manual and got them all figured out, except for the haynes had NOTHING in it about the cruise control??? which i found ridiculous as hell, so i just went with what i felt was right. and i had no "VTV" or "airfilter" hooked up off the vac line from my DP diaphragm, but i dont think that has to do with my issue, just giving all the info i got. that same jackass of a previous owner must have lost those along the way lol.
??????????????????????????????
thanks for all the help i need to get this peice back on the road
my thoughts on this is that the injectors are not getting a signal or something within the system is not properly grounded. i checked the ground wires on the intake manifold above the starter, there were 5 wires (i believe a few were white w/ red stripes, and the other few were brown) i used a DVOM and checked resistance from the grounds to the battery and theres was very little. i also made sure no connectors were bent going to the MAF, Distributor and injectors. i check the ohm readings on the distributor plug terminals, like the haynes manual shows (between terminals G1+ and G-, G2 and G-, and Ne+ and G-) all had readings so i figured it was ok..
any ideas? is there anywhere else i can check, or double check my work? where does the injectors get its signal from? i dont believe the N/A 7m's had any CPS. where are the rest of the grounds for the ECU?
by the way all i did differently when finishing the job was rerouting the vac lines because they were all screwed up from the previous owner.. what a jackass.. i got a diagram from my work off mitchell and from the haynes manual and got them all figured out, except for the haynes had NOTHING in it about the cruise control??? which i found ridiculous as hell, so i just went with what i felt was right. and i had no "VTV" or "airfilter" hooked up off the vac line from my DP diaphragm, but i dont think that has to do with my issue, just giving all the info i got. that same jackass of a previous owner must have lost those along the way lol.
??????????????????????????????
thanks for all the help i need to get this peice back on the road
