car not starting

[Heavy D]

maby you guys can help me out on this, well i just finish doing my head gasket, no i did not get a BHG but the factory headgasket was still fine, i just wanted to do just to be safe and what not, well i got a OEM HG, ARP bolts tq to 80lbs, stock 7mgte, the turbo was also rebuilt, all new gaskets, and i double checked the harness for grounds, i made sure the efi relay was on, i made sure the ecu was connected, i checked two of my grounds that it had, when i started the motor i noticed that my CEL was not one when i try to start the car, i also hear a click in the rear when i let go of the key when cranking, idk if thats the fuel pump or may be TEMS, then i hear couple clicking noise in the front that always does since i had the car, like if something is getting ready, may be you guys might know what it is and could help.

thanks

also this is a 88 targa 7mgte 5spd with around 160k miles

 

[jetjock]

Is the MIL on before you try starting it? Timing? Spark? Fuel pressure? You write a lot but don't say much...

 

[Heavy D]

yea it got dark before i could even check them out, but i can get back to you tomorrow, i was busy testing the ecu and relays, and checking the fuses, but my question is why is my CEL off instead of on, at the ON position?

 

[jetjock]

If the MIL is off when the key is on it means 1) the bulb is bad 2) the ECU isn't powered 3) Vc is shorted. The last two mean no start...

 

[Heavy D]

i believe the ecu is getting power, i checked the fuse block relay, and it is getting power, then i checked one of the harness that goes to the ecu and it showed 12V on the DMM, and the VC, not sure what that is, but i will check for sparks and gas in a few. i would like to try to get this running today since i started to work, and need the car to get to work, and do a few mods to it.

 

[Heavy D]

well there is no fuel or spark, i made couple grounds to the motor and nothing, but i did remember one day that i touched the positive from the ALT to the chassis, but the main engine harness was not connected at the time, also i dont know if every one has one connector from the fuse block hanging and i dont know if it could be that, i checked around and i didnt find any free connectors hanging loose, i also checked the ecu again to see if it has power, i have 4 connectors on the ecu and the one that dangles a bit shows power, when the key is off it shows 12V but when i turn the key on it shows 0.50V, and i dont think thats right, but maby one of you guys can help me out on that.

also if you need pics i can take some

thanks

 

[Victor Charlie]

Need pics and wire colors in the loose connector to help with that. It could easily explain the problem. It doesn't sound like a swap, but that would matter. The most methodical way to troubleshoot electrical, since you are reconnecting all the wiring. would be to follow the TCCS voltmeter tests in the TSRM and report the results back if you still have a question. It takes about an hour if you are slow. There isn't enough information in your post to answer your question.

 

[Heavy D]

well besides info, tell me what kind of info you need? all the grounds are connected, vsv, injectors, CPS, all of the connectors has been connected, but not sure if something could have tripped or something. if i could get some suggestions i could go and check it.

also does the 88 supra 7mgte has a fusible link by the battery area? i am checking the TSRM but i wanna double check with you guys too, to make sure

 

[Heavy D]

bump, any one?

 

[Heavy D]

ok i just checked voltage on the ecu, i am getting power on the harness with the ecu connected still, i checked Eo1, E02, E1, VF, E2, M-REL, BATT, +B, +B1, and they all show voltage, i just checked the basic stuff, then i checked all my grounds with a digital multimeter, at the very part of the grounds on the engine and shows good source of power, i still get no fuel or spark, and the check engine light is still off, the engine does crank over, but does not start, do i have a bad ECU? the car was running right before i did the headgasket, and every thing is in place, also i will take a pic of the only one connector that is not connected.

 

[koreyd]

i am having this same problem. no power to the black red wire at the fuse box under the hood. some reason the door controls and the supra won't start. baffling me too

 

[Heavy D]

just noticed that you live near by, about 1 hour away from me^^, well i have power, but the ecu doesnt have a check engine light, last night i put the FP on the diagnostic box directly to the positive of the battery and the fuel pump turned on, cranks and every thing works, but when i turn the key to the ON, i get no fuel or spark, i double checked my fuses, relay, and they all show power

 

[kotu100]

didya check to see if the CEL bulb is burned out, maybe those 2 problems are unrelated.
i have an extra ECU if u wanna give that a try.

 

[Heavy D]

well i found out that +B in the diagnostic box is not getting any power dont know why, but i put a wire from the +B to a fuse and then to the positive and the check engine light turned on. but the battery is dead to see if it will start, and then i gotta see if i am getting gas, if not i will make a switch for that too, pretty weird that im not getting power, and then last night i put the FP to the positive and starting putting fuel, i heard it and seen fuel coming out of the bolt, the bolt was loose so i can see fuel

 

[koreyd]

i know that the bulb is good just replaced all the bulbs in the cluster. i have no power doors locks. i have the taillamp failur light. no cel.
my clutch start switch has been run directly to the starter i have removed the factory alarm and grounded the blue orange wire.
all my lights come on but the mil. also no power to the b+ at the check connector and nopower to the c1 black red wire either.

i think it might actually be the 2.0l fusible link between the batttery and the fuse box. not sure what i am looking for there thou. can't seem to find a picture of where the fuseible link is. oh it is an 87 eletrical system. replaced everyfuse i could find with mulitmeter proven good stuff.
heavy d- oi tried jumping the b+ scheck connector to the baTTERY but still no mil(cel).

when i turn the key nothing. if i jump the fp terminal at the check connector i have fuel pressure. i haven't gotten to see if i am getting spark or not cant find the noid light. but i am guessing that i am not getting any spark.

---------- Post added at 02:13 PM ---------- Previous post was at 02:11 PM ----------

kotu100 - yeah i would like to check out that ecu. if i could. i dont think that is the problem but would be glad to rule it out.

 

[Heavy D]

^^^ i had that problem before on my 87N/A came to find out that it was the positive wire that goes to the fuse block wasnt connected properly, also there are relays and even more fuses under the dash by the drivers foot area.

 

[koreyd]

i have replaced every fuse and relay in the car. So i am thinking that it has something to do with the wiring between the battery and the fuse block. i am going to check it out the next weekday that it isn't rainy.
i am fairly certain that an inline fuse in the culpruit here.

 

[Heavy D]

damn its raining? its sunny over here, but yea i would check the wire, make sure its getting good power? also do you have digital multimeter? its good to have one to see if you are getting the full voltage, if i had gas money i would go over and give a hand, i just started to work so if i have left over money from paying bills that ill swing by, and ill pm you or you can PM me when ever your free

 

[koreyd]

nah it wasn't raining when i posted but my supra is at a buddy's shop. i think i fried the ecu a long time ago i had forgotten that my cousin was helping to start my parts car and hooked the battery backwards. and with no fusible link . the 100a fuse was cooked and i thought that the ecu is still good but without testing my ecu in another car and testing another ecu in my supra. i have no idea. . kotu100 can i use your spare ecu.

 

[Nick M]

ok i just checked voltage on the ecu, i am getting power on the harness with the ecu connected still, i checked Eo1, E02, E1, VF, E2, M-REL, BATT, +B, +B1, and they all show voltage, i just checked the basic stuff, then i checked all my grounds with a digital multimeter, at the very part of the grounds on the engine and shows good source of power, i still get no fuel or spark, and the check engine light is still off, the engine does crank over, but does not start, do i have a bad ECU? the car was running right before i did the headgasket, and every thing is in place, also i will take a pic of the only one connector that is not connected.

Did you notice what those pins are for?