Engine won't turn over

[st2b]

Well yesterday I had it running, I didn't mess with anything after the startups yesterday and today it won't start.


I checked the power, it's getting good power because the windows roll up fast, and everything is getting power. I turn the key to the start position and I get nothing.

It's an automatic, and I remember on my last car if it wasn't it park or neutral it would do the same thing, but it's in park. When I turn it over I hear a small clicking in the rear of the car. I called and talked to Mkiiiforme and he said it could be my fuel pump, but then again the motor would still turn over. I made sure the terminals were tight on the battery, and I made sure the ground lead to the block was connected and clean.

I don't know what it could be, it doesn't even turn over, but it has plenty of power, I tried to jump it with my dads truck and still nothing. All the fuses are in properly, I don't see any loose wires. Man, it really just bugs me.

The chilton's manual I have doesn't have anything useful to this problem, after looking through it for 30 minutes.. :1zhelp:

I will be posting a video soon of the problem.

Thanks guys
Matt

 

[cuel]

Make sure the little wire is connected to the starter correctly. The little locking tab likes to break off, and the connector will slip back and not get a good connection, or actually fall off.

 

[st2b]

I'm having troubles finding the starter. mkiiiforme told me it was by the flywheel?

 

[cuel]

It's under the intake. Put the driver's side on jack stands, and look up under the intake, just behind the motor mount, bolted right to the trans, next to the motor. If you know what a starter looks like, its kinda hard to miss...

 

[Linkstar07]

I was getting a bad signal from the key to the starter and wired up a pushbutton start switch on the dash. It turns the eng over anytime you push it but the engine wont start unless the key is "on'. Try jumping a 12v source to the small wire connector on your starter. It wont start unless the key is 'on'.

 

[Yakuzastinger]

The neutral start switch could also have gone bad and the car doesnt know its in park so it will not engage the starter u need to get a voltmeter and test for voltage to the starter (assuming it is plugged up and wires connected well and clean) if ur gettin a signal to the starter u could have a bad starter

tsrm can help you http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?Section=ST&P=2

 

[st2b]

How could this happen by the Supra just sitting overnight?
Supra's can have many problems, and when they do, they are a bitch to track down and fix unless you have done it 1,000,000 times before.

 

[st2b]

And I do remember it started in reverse one day, because my dad thought he put it in park, and after we got the food (Drive thru) he started it up (The brake was on so it didn't go anywhere..)

So it could be the neutral start switch?

 

[cuel]

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?Section=AT&P=41
That's how you test the neutral start switch. Could be any of the afore mentioned problem areas, as well as the relay, broken wires, theft deterrent system, or as simple as a blown fuse. You're not gonna know until you do some diagnostic work. All we're doing is mentioning possibilities, not giving definite answers.

 

[st2b]

I understand, and I thank all for putting up with my non-sense questions. I'm going to pull the EFI fuse tomorrow and see if some of the things I fixed are still bugging the check engine light.

I'm really starting to think it is the neutral safety switch. Here is an excerpt from my manual (Chilton's)
"NOTE: On the Supra vehicles the back-up light switch is incorporated in the neutral safety switch assembly."

My back-up lights don't work, so I think this might be the problem..

My manual doesn't explain where the NPS is, so I will search the TSRM..

Is it hard to replace? And how much do they usually cost?

Thanks guys,
Matt