HELP. trouble starting 72 1.7L |
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HELP. trouble starting 72 1.7L |
forzamotorsport9 |
Nov 17 2009, 10:30 PM
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#21
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Newbie Group: Members Posts: 44 Joined: 2-November 09 From: Bettendorf Iowa Member No.: 11,001 Region Association: Upper MidWest |
ok so i installed my tangerine racing tunnel and engine compartment lines no problem there, installed a 34R Optima Red-Top, a little big but oh well, went to turn it over, wouldnt turn over. i looked and coming off of the coil is a green wire attached to nothing, i think its a ground. where does this thing go.
any ideas on getting it started and where that ground needs to go. i would figure the engine case but i tried holding it there and pulled out a spark plug and hooked back to the wire to see if it would start and got nothing, i then grounded it to a bolt connecting the tin cover (i think?) to the head and the continuity tester said the circuit was ok so im guessing something has to be wrong with the ignition system, either the coil or distributor, which i THINK is newer and uses the magnetic thing to adjust dwell, which i loosly understand the concept of. also, could it just be the spark plug? it didnt look fouled or anything but i couldnt see a visable spark when having someone try to start the car and it wouldnt gap to the engine case either, so idk whats up im only 18 and a senior in high school so a lot of this is new to me, ive read about it in magazines but never this deep, nor got my hands dirty (i have now! (IMG:style_emoticons/default/beerchug.gif) ) i just wanna see the damn thing run, for only having 47,259 miles on the clock it shouldnt be too big of a deal to fix. i included a picture of what it looked like with just a basic clean too, no detailing or anything, not bad for being 38 (i think?) years old!) i trust the ppl on this site too, so if anybody want my phone number just shoot me a pm and id be more than happy to discuss it on the phone. THANKS IN ADVANCE. note: the green wire in the one pic is the one i grounded. it was just sticking up like in the picture before i grounded it |
r_towle |
Dec 5 2009, 05:19 PM
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#22
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Custom Member Group: Members Posts: 24,624 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
Alright.
Look at the positive terminal of the battery. How many wires are attached? Get a meter on the fat RED wires going TO the ignition switch inside the car. I get to these at the front of the tunnel or near the shifter. What you want to see is two things. You want to find the RED wire that has power with no key in the ignition. You want to find the RED wire that has power with the key in the RUN position...basically going back to the relay board. Use sewing pins and stick them right through the middle of the red wires...then test for 12vdc on each wire till you find it. They are the larger diameter wires...they are the only ones. If this is positive, you now need to find the RED wire in the tunnel that has power once the key is turned on to the run position. Use the same process, but this wire will only have power when key is in the run position. This RED wire leads to the relay board. There is also a YELLOW wire that is the trigger for the starter. While your there, test it. It will only have power with the key in the start position. Its kinda stupid, but power goes from the battery, to the ignition switch, then back the the relay board...its a long way. If this test fails, you need a new ignition switch. If the test passes, go to the relay board, and find that RED wire and test for power again at the relay board to verify its still getting there. If you have power at the relay board, its either the relay board or the wiring to the pump...or the pump..or the fuel injection relay. This is all assuming that you have checked ALL the fuses with a meter, not just visually. Make sure they all pass power from one side to the other...not just ohm, but 12VDC on each side. |
forzamotorsport9 |
Dec 7 2009, 04:46 PM
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#23
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Newbie Group: Members Posts: 44 Joined: 2-November 09 From: Bettendorf Iowa Member No.: 11,001 Region Association: Upper MidWest |
Alright. Look at the positive terminal of the battery. How many wires are attached? Get a meter on the fat RED wires going TO the ignition switch inside the car. I get to these at the front of the tunnel or near the shifter. What you want to see is two things. You want to find the RED wire that has power with no key in the ignition. You want to find the RED wire that has power with the key in the RUN position...basically going back to the relay board. Use sewing pins and stick them right through the middle of the red wires...then test for 12vdc on each wire till you find it. They are the larger diameter wires...they are the only ones. If this is positive, you now need to find the RED wire in the tunnel that has power once the key is turned on to the run position. Use the same process, but this wire will only have power when key is in the run position. This RED wire leads to the relay board. There is also a YELLOW wire that is the trigger for the starter. While your there, test it. It will only have power with the key in the start position. Its kinda stupid, but power goes from the battery, to the ignition switch, then back the the relay board...its a long way. If this test fails, you need a new ignition switch. If the test passes, go to the relay board, and find that RED wire and test for power again at the relay board to verify its still getting there. If you have power at the relay board, its either the relay board or the wiring to the pump...or the pump..or the fuel injection relay. This is all assuming that you have checked ALL the fuses with a meter, not just visually. Make sure they all pass power from one side to the other...not just ohm, but 12VDC on each side. im going out to the garage to do all of this right now, will update soon |
forzamotorsport9 |
Dec 7 2009, 06:36 PM
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#24
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Newbie Group: Members Posts: 44 Joined: 2-November 09 From: Bettendorf Iowa Member No.: 11,001 Region Association: Upper MidWest |
ok i have power at the relay board. how do i check the wire that goes to the fuel pump. i have no idea which one it is and i looked and i cant even tell where it goes to.
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