3rd gen swap wont start Options

[RUNNIN-LOW]

starter wont crank...just clicks from the inside.(of car).there seems as if there is no power going to the starter..wierd thing is that the radiator fan stays spinning.rechecked all wiring harness plugs and ground..starter wont crank over..checked starter today and it is working fine. please can anyone help with this problem....wiring harness was made by dr.tweak so i trust that it is fine..ooh yeah i did and have checked all the fuses like 30 times already even have one of my buddys do it like 10 times..everything is right...

This post has been edited by RUNNIN-LOW: Jun 8, 2007 - 11:26 PM

[OOBE]

Check the crank position sensor. On my Supra, the harness was dry-rotted and I accidentaly hit it with a wrench and one of the cables disconnected but it was still inside, so it looked fine. You could only hear a click when trying to start it.

[eggman40]

Make sure all your grounds are good and are connected to a good piece of metal, without paint. I had the same issue with my swap and i think it was lagos who said check the grounds. I ended up finding one wire i didnt bolt to the tranny... and sure enough the engine turned over right away after i connected the wire. Good Luck!

This post has been edited by eggman40: Jun 9, 2007 - 5:07 AM

[toyotacrazy]

starter wont crank...just clicks from the inside.(of car).there seems as if there is no power going to the starter..wierd thing is that the radiator fan stays spinning.rechecked all wiring harness plugs and ground..starter wont crank over..checked starter today and it is working fine. please can anyone help with this problem....wiring harness was made by dr.tweak so i trust that it is fine..ooh yeah i did and have checked all the fuses like 30 times already even have one of my buddys do it like 10 times..everything is right...

Will the engine turn over by hand?

[RUNNIN-LOW]

yes the enigine will turn over by hand..try that today..yeah the ground are all good..something is just not kickin the start to spin..im so lost..going to take it to the shop tomorrow and have them take a look at it

[phattyduck]

Have you tried a different battery? The click is often a sign of a low battery...

Put a volt/multi-meter on the battery while you try cranking and see if the voltage drops a ton (and make sure it is over 12.5V with no load).

-Charlie

[toyotacrazy]

Have you tried a different battery? The click is often a sign of a low battery...

Put a volt/multi-meter on the battery while you try cranking and see if the voltage drops a ton (and make sure it is over 12.5V with no load).

-Charlie

Does it click once or multiple times when you turn the key? If its once keep hitting it, Thats bad starter contacts. If its multiple times, its probably a bad battery. keep us updated

[DSToyo]

Have you tried a different battery? The click is often a sign of a low battery...

x2, if it rapidly clicks, you might want to charge your battery first.

[RUNNIN-LOW]

kk today i figure out or i think i did..good points first i have spark..i can crank the motor manually..i have fuel pressure.nothing is leaking either..BUT!! the motor wont start..there has to be some power problems with the start module to the ignition..not sure what it is..grounds are connected right and tight..battery is brand new..ooh and it only click once.when i start or turn the ingintion.pictures are going to be posted up tomorrow of the clips and other stuff i think shouldnt be connected..have loose plugs that have no connection to it...

[toyotacrazy]

kk today i figure out or i think i did..good points first i have spark..i can crank the motor manually..i have fuel pressure.nothing is leaking either..BUT!! the motor wont start..there has to be some power problems with the start module to the ignition..not sure what it is..grounds are connected right and tight..battery is brand new..ooh and it only click once.when i start or turn the ingintion.pictures are going to be posted up tomorrow of the clips and other stuff i think shouldnt be connected..have loose plugs that have no connection to it...

keep turning the ignition multiple times. Its probably your starter contacts. It should crank eventually unless you have an electrical issue

[scothaniel]

I had the single click when I had a bad ground (the connection on the trans was too loose).

When you say you can crank the motor manually, do you mean by jumping power to the starter directly?

Is the circuit opening relay (next to the ECU) engaging when you try to start it from the ignition switch?

This post has been edited by scothaniel: Jun 12, 2007 - 11:45 PM

[RUNNIN-LOW]

i didnt check that yet the circuit opening relay..ill check that tomorrow.. but yeah im putting power directlly to the starter..have have spark and i know for sure the injectors are shooting fuel...ooh the wiring harness was made by dr.tweak so yeah im sure it is right..

[toyotacrazy]

I had the single click when I had a bad ground (the connection on the trans was too loose).

When you say you can crank the motor manually, do you mean by jumping power to the starter directly?

Is the circuit opening relay (next to the ECU) engaging when you try to start it from the ignition switch?

By crank manually I mean put a wrench on the crank pulley and make sure the engine will spin over.

[RUNNIN-LOW]

kk got pictures but havent loaded them up yet..but yeah i can spin the engine..kk there is a problem now i have spark i have fuel pressure but my injectors arent spittiing..i have no power going to the injectors..something wierd is going on with my harness. dr tweak did it too so im sure it should be fine..i think there is a wiring problem that is not kickin it runs from my ingition to my starter to kick the injectors to fire up..anyone have anyclue how i can fixs this...

[scothaniel]

Do you have the injector resistor pack in? Do you have power at the resistor pack when the key is at IGN2?

I'm not familiar with Dr. Tweaks modifications to the harness, but the stock system on the 3rd gen 3S motors goes like this:
Power goes from the AM2 fuse, through the ignition switch (position #2) to the resistor pack (aka efi resistor) and on to the injectors. The ECU always supplies the ground to the fire the injectors.

This post has been edited by scothaniel: Jun 18, 2007 - 12:42 AM

[toyotacrazy]

Do you have the injector resistor pack in? Do you have power at the resistor pack when the key is at IGN2?

I'm not familiar with Dr. Tweaks modifications to the harness, but the stock system on the 3rd gen 3S motors goes like this:
Power goes from the AM2 fuse, through the ignition switch (position #2) to the resistor pack (aka efi resistor) and on to the injectors. The ECU always supplies the ground to the fire the injectors.

Unplug the 2 wire coil, injectior resistor, and the igniter. turn the ignition on and check to make sure you have 12 volts to all the above wires. This is assuming the 3rd generation is the same setup as 2nd generation.

[RUNNIN-LOW]

These are the plugs that has no other plugs to plug it in...








The one in the middle is my SUPERMODEL!!

[scothaniel]

Ok, it looks like you have some 3rd gen connectors and 2nd gen parts.

The first plug is the starter trigger wire - it goes just above the big wire on the starter. Looks like you have a 3rd gen plug and a 2nd gen starter.

The 4th pic is of the injector resistor pack connector (with all the black/orange wires), which explains why you dont have power at the injectors. I think the 7th pic is the resistor pack itself - I'll have to check my swaps to verify. You need to connect these two - or get the right injector pack to match the harness.

I think the 6th pic is the connector which goes to a noise reducer for the coil.

This post has been edited by scothaniel: Jun 21, 2007 - 2:17 PM

[toyotacrazy]

Ok, it looks like you have some 3rd gen connectors and 2nd gen parts.

The first plug is the starter trigger wire - it goes just above the big wire on the starter. Looks like you have a 3rd gen plug and a 2nd gen starter.

The 4th pic is of the injector resistor pack connector (with all the black/orange wires), which explains why you dont have power at the injectors. I think the 6th pic is the resistor pack itself - I'll have to check my swaps to verify. You need to connect these two - or get the right injector pack to match the harness.

I think the 5th pic is the connector which goes to a noise reducer for the coil.

The last pic. (other than the chicks ) Is the cruise control connector. I think you are correct on the others just by the colors and number of wires. Let us know what happens when its all hooked up correctly

[RUNNIN-LOW]

k well humm.. where do i get the (4th pic)injector resistor pack from would a thrid gen mr2 pack work??..and also do i even need the(5th pic) noise reducer coil to be plugged in anywas..ooh yeah i know where the starter plug goes but that was just to show yah my problem..i might just take my old start and rebuild it.anyone have aclue about the third picture.