 Why wont it start! |
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 May 17, 2012 - 9:40 PM
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 Enthusiast Joined Jul 22, '07 From Hendersonville,Tn. Currently Offline Reputation: 0 (0%)  |
So I did an engine swap. Bad 7afe for a good 7afe. The long and short is, the engine is in. Bolted up, wired up, and wont start. Ive have good grounds, I'm getting power to the relays, fans, etc. But the starter isn't doing anything. I know its hooked up, because i never disconnected it during the swap, and I never had problems with it before. WHAT IS GOING ON ?! .......HELP!
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May 17, 2012 - 9:51 PM
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 Enthusiast  Joined Feb 23, '12 From Warrior, AL Currently Offline Reputation: 0 (0%) |
Ground to starter perhaps? Ignition switch. If it's an automatic, could be a neutral safety switch acting up. Would be something along those lines if the starter isn't even bumping over. Odds are it's something simple. I forgot to attach the ground to a starter once, talk about freaked out.
-------------------- 2001 Miata LS 5-speed
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May 17, 2012 - 9:54 PM
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 Enthusiast Joined May 10, '10 From MA Currently Offline Reputation: 37 (100%) |
You realize the starter could be bad? I had that happen after my transmission swap. It had a dead spot so I swapped that out with the one I had laying around haha
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May 17, 2012 - 10:07 PM
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Enthusiast Joined Feb 23, '12 From Warrior, AL Currently Offline Reputation: 0 (0%) |
^^Of course the above. Things on cars like to die suddenly at times.
-------------------- 2001 Miata LS 5-speed
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May 17, 2012 - 10:34 PM
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 Enthusiast Joined Oct 29, '11 From Haltom City, Texas Currently Offline Reputation: 1 (100%) |
QUOTE (Special_Edy @ Apr 3, 2012 - 12:41 PM)  First step is to determine if the starter works. There are two wires connected to the starter, one that is always receiving power from the battery and a smaller wire that makes the starter operate when you turn the key in the ignition(the solenoid wire). When you turn the key, 12 volts is sent thru the solenoid wire to tell the starter to start turning. So to test the starter you will need to unplug the solenoid wire(look at the pic below, it has a black plug) and use a small piece of wire to short the battery terminal of either the starter or the positive side of the battery to the solenoid plug on the starter(touch it to the solenoid plug on the starter, not the wire from the ignition silly) The starter will now start to spin nonstop until you remove the wire, if the starter is functioning correctly. If the starter did not spin, it is a bad starter. If the starter did spin, then either the starter relay or ignition switch are bad.(so go ahead and reconnect the starter like its supposed to be)  To test the starter relay and ignition switch- First locate the starter relay inside the fusebox(it is located next to the battery alongside the driverside fender on my 94 GT) In the pic below, it is the purple one(yours may be different) Carefully pry the starter relay and the EFI? relay beside it out. You need a flat screwdriver or two to pry the tabs on the base of the relay so that you can wiggle it out. Now swap the two relays(put them back in the opposite spots) and try to start the car. If the starter magically starts working then you have a bad relay. If the starter tested good and the relay swap did not fix it, then you have a bad ignition switch.  Hope this helps let me know if you need any clarification. Also, Autozone can test starters on or off of the vehicle(better to remove it and let them test it on a bench) hope this helps  Use the search button! This post has been edited by Special_Edy: May 17, 2012 - 10:36 PM |
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May 18, 2012 - 10:26 AM
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Enthusiast Joined Jul 22, '07 From Hendersonville,Tn. Currently Offline Reputation: 0 (0%) |
QUOTE (Special_Edy @ May 17, 2012 - 11:34 PM) QUOTE (Special_Edy @ Apr 3, 2012 - 12:41 PM) First step is to determine if the starter works. There are two wires connected to the starter, one that is always receiving power from the battery and a smaller wire that makes the starter operate when you turn the key in the ignition(the solenoid wire). When you turn the key, 12 volts is sent thru the solenoid wire to tell the starter to start turning. So to test the starter you will need to unplug the solenoid wire(look at the pic below, it has a black plug) and use a small piece of wire to short the battery terminal of either the starter or the positive side of the battery to the solenoid plug on the starter(touch it to the solenoid plug on the starter, not the wire from the ignition silly) The starter will now start to spin nonstop until you remove the wire, if the starter is functioning correctly. If the starter did not spin, it is a bad starter. If the starter did spin, then either the starter relay or ignition switch are bad.(so go ahead and reconnect the starter like its supposed to be) To test the starter relay and ignition switch- First locate the starter relay inside the fusebox(it is located next to the battery alongside the driverside fender on my 94 GT) In the pic below, it is the purple one(yours may be different) Carefully pry the starter relay and the EFI? relay beside it out. You need a flat screwdriver or two to pry the tabs on the base of the relay so that you can wiggle it out. Now swap the two relays(put them back in the opposite spots) and try to start the car. If the starter magically starts working then you have a bad relay. If the starter tested good and the relay swap did not fix it, then you have a bad ignition switch. Hope this helps let me know if you need any clarification. Also, Autozone can test starters on or off of the vehicle(better to remove it and let them test it on a bench) hope this helps Use the search button! Thanks, Ill work through those steps till I find the bug. QUOTE (Box @ May 17, 2012 - 10:51 PM) Ground to starter perhaps? Ignition switch. If it's an automatic, could be a neutral safety switch acting up. Would be something along those lines if the starter isn't even bumping over. Odds are it's something simple. I forgot to attach the ground to a starter once, talk about freaked out. Thanks, Ill look into it. |
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May 18, 2012 - 10:37 AM
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Enthusiast Joined May 29, '09 From Gainesville, FL Currently Offline Reputation: 17 (100%) |
Were the engines within the same year range for OBDI and OBDII?
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May 18, 2012 - 4:27 PM
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Enthusiast Joined Jul 22, '07 From Hendersonville,Tn. Currently Offline Reputation: 0 (0%) |
QUOTE (rave2n @ May 18, 2012 - 10:37 AM) Were the engines within the same year range for OBDI and OBDII? not sure what that is. can you explain a little? |
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May 18, 2012 - 4:35 PM
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Enthusiast Joined Apr 20, '09 Currently Offline Reputation: 4 (100%) |
Are the engines pre-1995, or post-1996? OBDI engines were around through 1995. '96 saw the introduction of OBDII, and this changed some of the sensors/electronics with the engine.
-------------------- ~Moving on to a 2002 Corolla S~ R.I.P Tom Celica - 1994-2010 |
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May 18, 2012 - 5:35 PM
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 Enthusiast Joined Mar 22, '07 From Houston, TX Currently Offline Reputation: 4 (100%) |
Was the wiring harness swapped from the old engine to the new one? if the harness is auto and the car is manual (or vice versa) the starter circuit will not work
-------------------- QUOTE "And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH 1994 GT: V6 swap, 5speed E53 W/ LSD, All Power, now RED 1995 ST: SOLD @273k miles, Auto, all power, CarPC, White 1994 ST: Totaled, 5spd, all power, Red RIP 07/09/09 @ 241,810 1994 Lexus LS400: This is my new DD |
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Jun 22, 2012 - 2:27 PM
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Enthusiast Joined Jul 22, '07 From Hendersonville,Tn. Currently Offline Reputation: 0 (0%) |
My car is a 94, idk what year the "new" engine is(engine #2). It looks newer than the old engine(engine #1), I do know that the the injectors are in diff places. On #1 they go into the intake, and on #2 they go into the head itself. Also, there are a couple plugs coming from the cars harness that I cant find homes for. So I'm thinking that Ive got a OBDII. I need help, Ive got to get this thing running. What are some of the diff between the two?
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Jun 22, 2012 - 4:13 PM
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Enthusiast Joined Dec 8, '03 From Lancaster CA Currently Offline Reputation: 6 (100%) |
the above picture is labeled a little wrong. the small plug is actually a ground. the large plug is constant 12V straight from the battery. when you turn the key the starter relay actually completes the circuit and grounds the starter. so unless you are turning the key, the small plug on the starter is floating.
-------------------- 2001 Celica GT-S Turbo
1997 Supra TT 6speed 1997 Celica 3MZ/1MZ swap 1990 Celica All-Trac |
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Jun 23, 2012 - 8:26 PM
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Enthusiast Joined Mar 22, '07 From Houston, TX Currently Offline Reputation: 4 (100%) |
small plug may be a ground.. but when it cranks its +12v
-------------------- QUOTE "And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH 1994 GT: V6 swap, 5speed E53 W/ LSD, All Power, now RED 1995 ST: SOLD @273k miles, Auto, all power, CarPC, White 1994 ST: Totaled, 5spd, all power, Red RIP 07/09/09 @ 241,810 1994 Lexus LS400: This is my new DD |
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Jun 23, 2012 - 11:52 PM
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Enthusiast Joined Mar 11, '06 From Way South Chicago Currently Offline Reputation: 0 (0%) |
Small wire is power from the igniton/starter relay. The whole stater grounds to the engine/trans. Small wire is + for solenoid.
This post has been edited by Bitter: Jun 23, 2012 - 11:55 PM -------------------- |
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