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The mkiv Supra Owners Club

Car Starting Issue


Steve A

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Ok after reading a good few pages on here I'm still stuck in this.

 

Been working on the engine bay the past week (new intake manifold and y pipe and replacing old cam cover gaskets). As well as a bit of tidying and cleaning of various plastic covers etc. got it all back together and started car.

Car had not moved in 2 months before this so battery was very low on power, but the car started all was fine just a small bit of smoke from the manifold (bit if oil had dripped on it from cleaning the leaking gaskets) all was good until it suddenly just cut out, car was low on fuel so I left it until today and put in 6 litres of fuel assuming this was the issue.

Now car turns over but will not start. All fuses are fine, no warning lights, fuel pump is working (can hear it) everything electrical works. Only odd thing is what sounds like air escaping when u give up trying to turn it over I've checked all hoses and all seem to be connected.

 

Any ideas?

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have a check to see if its sparking, did you block the intake with a rag to stop dirt getting in? have someone turn over the car whist you listen for the air leak, it could be the brake servo leaking causing the noise but it would not stop the car from starting, good luck, let us know what you find. regards chris.

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Right still is not starting so am stripping it all back and checking everything.

 

First Problem is the spark plugs are the wrong ones ngk bcpr6ey isn't correct for a NA if I've read the FAQ correctly so will be ordering new ones.

 

Could this be the problem? Will this have done any damage? image

 

Picture of one of the plugs should they look like this or is this a particularly bad one.

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Could this be the problem? Will this have done any damage?

 

Very unlikely, the worst that would happen is a misfire.

 

In regard to your original problem, it could be a connection loose from when you were cleaning up the bay, make sure all the plugs are firmly in place and if possible, do a check to make sure the spark plugs are actually sparking(you may need to borrow the tool from a mechanic friend, if you have one?)

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yes it would, check the ignition amp and ecu plugs for bad connections, look through the wiring manual to check continuity of the wiring if needed. I take that you checked it was not sparking? do a search on here, I think that some people have had the ignition play up after jump starting?

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  • 2 weeks later...

Well

 

New Dizzy cap, new rotor arm,new coil to dizzy lead, new spark plugs, also tested with new coil and igniter. Still no change :(.

 

Everything is connected has at least 18 litres of fuel. Will upload a video in a second but I am completely out of ideas :(.

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Ok new fuel filter bought will hopefully be able to fit it without destroying my drive :).

 

Do I have to disconnect the fuel pump or can it be done by a fuse. Seems to be a lot of discussion but couldn't find an exact answer. Only reason I ask is it will save me a lot of hassle not having to remove the boot build.

 

If filter isn't the answer anybody got any suggestions on what next to look at?

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change of fuel filter is very straight forward job, just put some container to catch fuel. it won't leak a lot, but it will sip a bit. You can use small caps from new filter to plug this leak :-) you do not have to disconnect fuel pump, make sure you put copper seal ring back in place before screwing fuel bolt into filter

Edited by Konrad (see edit history)
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Well

 

New Dizzy cap, new rotor arm,new coil to dizzy lead, new spark plugs, also tested with new coil and igniter. Still no change :(.

 

Everything is connected has at least 18 litres of fuel. Will upload a video in a second but I am completely out of ideas :(.

One more time. Is it sparking,?

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  • 3 weeks later...
  • 2 weeks later...
  • 3 weeks later...

Been a bit to busy to look at this but having done a lot of reading on starting issues I'm starting to wonder if it could be the starter motor?

 

Got 4 days off coming up so going to try and get this finally sorted so any more ideas would be useful :).

 

Did try and get a mobile mechanic out but local ones didn't want to even look :(. any local guys who know way around the engine bored next weekend and want to give a hand pizzas on me :).

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Guest suprageek

Sounds like what my car was doing, there was no spark, the car was just cranking but wouldn't start, bought an igniter, no joy, new plugs no joy, turned out the trigger wheel had came off the back of the crank timing pulley and hit the crank position sensor, welded the wheel back on and changed the crank position sensor car fired up first time!

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Sounds like what my car was doing, there was no spark, the car was just cranking but wouldn't start, bought an igniter, no joy, new plugs no joy, turned out the trigger wheel had came off the back of the crank timing pulley and hit the crank position sensor, welded the wheel back on and changed the crank position sensor car fired up first time!

 

Did read your thread but mine being an NA I don't think it has a CPS etc so can't be the same sadly :(.

 

Side note has anybody used ngk ignition leads before or should I just go to Toyota.

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  • 1 month later...
Did read your thread but mine being an NA I don't think it has a CPS etc so can't be the same sadly :(.

 

Side note has anybody used ngk ignition leads before or should I just go to Toyota.

 

Still stuck on my driveway :(.

 

Parts tried so far

 

New Leads

New Plugs

New Coil Lead

New Cap

New Rotor Arm

 

 

ECU

Coil

Ignitor

 

Everything else comes on and works when I turn the key so assuming battery is ok

 

Car now cranks over again small wiring issue resolved.

 

Can smell fuel and the hear the pump working.

 

Huge bag of haribo for the person who works it out :).

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Good God, what a ludicrous way to diagnose, buying all that stuff just to see if it'll start!! It's easy, REALLY easy. Is there a spark if you wedge the disi end of the lead from the coil to the disi about 10mm from an earth point and turn the engine on the starter, with a fully charged battery?

 

If not you need to see if the coil is getting about 12 volts to one side of it with the ignition on. Then you need to see if the disi is turning the ignitor box on and off and the ignitor is turning the coil on and off.

See if there's a spark from the coil lead first. Best done in dim light.

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Guest Roger NE
Good God, what a ludicrous way to diagnose, buying all that stuff just to see if it'll start!!
Agreed ! (that's the kind of thing many garages do, mind . . . and give you the bill !!)

 

As Chris says, you need to do some checks . . . with a Multimeter . . if you don't have one, buy one off ebay for £5 ! (I'd recommend an Analogue one, as you get less misleading readings . . plus you can see if anything is varying)

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