delayed cranking

[isnms]

with the key in the ignition, clutch in, i turn the key and for a couple of seconds, sometimes three, at times four, nothing. no clicking, no dimming of lights.

continue holding the key in start for those couple of seconds, it fires up. cranks up no problem. doesn't happen all the time. mostly when it hasn't been started in a couple of hours.

battery is good, starter is good.
bad wire connection somewhere? bad ground?(what ground should i look at)

 

[isnms]

:icon_redf battery was not good

replaced battery, no problem now

 

[IJ.]

:icon_redf battery was not good

replaced battery, no problem now

LOL

 

[Suprastic]

hold back that thought. I have had the same problem with my supra for over 3 years now. I end up warrantying my battery about every year to year and a half. I will work fin for a couple of month and then start to do the same thing. I also had the same problem but sometimes with mine it just would not start at all even if I left it for 10-15min and a boost with the other car not running won't work. The car has been sold to may G/F neighbour and would like to figure this out before he pics it up.

 

[isnms]

hmmmm, i'll keep this updated then.
for now it's firing right up.

 

[Slow Poopra 7MGTE]

haha thats funny atleast its fixed i would have said bad connection

 

[isnms]

This has been an intermittend problem since I started this thread. The battery did not fix it.
I need a new wiring harness.
I have patched the problem with the 'UK relay mod' and it has cranked every time since.

 

[SPD TRP]

Was going to suggest that, mine had the same problem, click from relay but to start, play with it then it would crank. Mine had something to do with the factory alarm not giving a ground source.

Put in a Bosch relay and hasn't done it once since then.

Wayne

 

[akito]

My car does the same thing. Some times it takes up to 4 secs to start. If it doesnt start after 4 secs then i let it go and try again, it starts right up. It feels like there was no fuel being sent or something. I hear the fuel pumps work though. May be i need a tune up.

 

[supraguy@aol]

I've had the same problem for the last two yrs, intermittently.
I usually see it happen in the winter/ colder weather. There are times when I have to hold the key in the start position for up to a minute, then all of a sudden, it cranks at full speed, as if nothing were wrong. Other times, I can't get it to work unless I get a jump start. This tells me that the relay is very sensetive to voltage, and that it's demanding the battery's max possible voltage to open the circuit. I suspect either the starter relay, or the starter itself, has a slightly bad contact.

 

[jetjock]

All this does is pilot the starter solenoid in exactly the same as the car's stock circuit. To make matters worse it's not even bypassing the stock circuit where the single point of high resistance lies. It's still being used, just that now it doesn't have to deliver the same current as before. In other words this mod doesn't jumper around the bad spot, it only lowers the current enough to temporarily overcome it. That's what makes it such a hack.

You should've tracked down the root cause using voltage drop testing. It can only be one of a few components and I can assure you it's not in the harness itself unless it's a bad connector. While this mod is a quick way to overcome doing diagnosis it didn't treat the disease, only the symptom. The disease is still involved every time you turn the key. At some point the symptom will reoccur as the resistance reaches a level where it'll be unable to supply enough current to energize the pilot relay. That could take several years or happen tomorrow. As I said, that's what makes this mod a hack.

 

[isnms]

I haven't given up on finding the root cause. That's why I didn't say I fixed it, only that I patched it.

The starter has cranked strong ever since and, before the relay, it became a daily occurrence. That and having had the starter tested seems to assure me it's not the starter. The problem is somewhere on the control circuit, as you have said before JJ. The voltage drop testing should locate it.

 

[jetjock]

Most only care if care about is the car starts. Me, I can't think like that. Too many years of "eyes guts to nose" why shit happens .