Won't Start

[Irish_Mechanic]

as far as the condensation in the exhaust pipe putting out white smoke - if you've seen a steamer, you'll recognize that water vapor is clear. if you've seen the oil fields in the middle east ablaze(or a honda with shot rings) you'd recognize white smoke.

As far as putting power directly from battery to starter - there is an 8 guage wire running directly from battery to starter.

the clunking you're talking about could be anything - including lower end bearings (hope not)... vibrations like that may trip the knock sensors....

i think you're best bet is to get a mechanic to look at it. if you lived closer i'd come see, but as i'm just outside of philly...

[Irish_Mechanic]

he is right in his diag procedure - spark then fuel, then compression..... however, most people go haywire checking sensors (me) well before busting out the compression tester... especially on cars that make changing spark plugs a pain in the ass...

[mkiiisupra]

clunking? its like a click, the noise some relay makes in the supra everytime it does a start, its just that i only hear that it isnt follow up by the engine turning over

So not a mechanical thing since engine is not to the point of cranking yet

[mkiiisupra]

How do you test the fuel system?

Prior to this my car would never crank the first time cold, took me try'n to turn over the engine twice then it would start up just fine. With engine warm it would start every time no problems.

I have suspected the fuel system before. New battery in car, and had advanced auto test alternator said it was good. New spark plugs, Diffrent spark plug wires. Vacumm lines all redone. So im at a loss as to what to do next

[Pretaco]

Back to basics.

You seem to have a handfull of problems and a very confusing problem.

Your click when starting is probably the starter contacts inside the starter. That is a common toyota problem. Just keep trying it until the starter turns over, jumping it will also help if your battery isn't fully charged.

Once you get it to turn over, pull a plug wire and hold it close to a body ground with a screwdriver pushed into the end of the wire, to check for spark between the screwdriver and the body ground, or "feel the spark"

If you get a timing light, hook it up to the #1 cylinder wire and even if it doesn't start, you will get a light and can check the base timing at the crank.

If those are both good, crank it for a few seconds and loosen the cold start injector, or any other pressurized fuel line and fuel should squirt/shoot out. Thats the easy way to check fuel pressure.

Get a stethescope and listen to the injectors as you crank the engine, they should make a rapid and pronounced clicking sound.

In my experience, white smoke is coolant, bluish white is oil, and black is fuel, but coolant and oil can be hard to tell apart, until you smell it, sweetish smelling smoke is coolant.

Even with a blown head gasket it should start, unless there is enough coolant leaking to hydrolock the engine, the engine will start on 3 cylinders. (ask me how I know that!)

Ray.

[mkiiisupra]

Ok cool, good post. i will try this out tomorrow once i get off work tonight, I also reached out a botherd a neighbor lol very mechanically inclined and has a MKIV supra that he has done alot work to it, about 800 hp of work.

I would agree on the confusing part, i have had a loss of power issue with this thing forever and have fixed a great deal of problems, even taken it to diff places, including dealership for them to tell me they have no idea what is wrong....

I thought it was becuase of the knock sensor and TPS and that ecu was retarding the timing or w/e cuase had a bad signal from them but the 15mins i got to drive her, she still had that loss of power BAH!! maybe next 2 days i will figure it out

[mkiiisupra]

Problem solved????

Went out decided to give it one more go.

Checked fuse box, went ahead and replaced the 15A fuse for the EFI even tho it still looked good.... started her up she cranked isntantly

like faster than she ever has before .... lol

[Irish_Mechanic]

keep a few more of those fuses in the car! dunno why she blew, but in case she does again...

glad u got her running