my 1995 supra engine wont fire

[gkhawk]

hi ive just change the engine in my toyota supra from a 1993 jap import to a 1995 jap import due to the other one blowing up it has been all wired up ive changed the spark plugs checked dissy cap & wires & all fuses but it still wont fire up when turning over. can any one help me out please? thanks

[SupraSaver87]

You could have a couple problems...

1) No fuel to cylinders
2) Spark...or lack there of.
3) Air, again, lack there of.

Check these things out, then report back. If it is getting fuel, but no air, then you should be able to fire your cylinder yourself with a BBQ lighter shoved down into the cylinder, while the spark plug is out.

P.S. Please do wear leather gloves when doing this, normal work gloves will work, otherwise you WILL burn yourself when it fires, and shoots flame past your hand. Also keep your eyes, and face away....you don't need to watch the pretty flame...or know what it looks like while you fire it...if it fires, YOU WILL KNOW!

No fuel....won't fire, you are fuel injected, so with the spark plugs out, you can turn your car off, then just put it to ACC...DO NOT TRY TO START. When you put it to ACC your fuel pump should "Prime" your cylinders with fuel, for the initial *BANG* when you turn it over....do this a couple times with spark plugs out, then go and try the manual cylinder fire method again. Still no flame??? Then you are either out of fuel, or you arn't getting fuel.

No spark...Well I am confident that you would know how to check this, but here is ONE method if you don't. Take one wire, with spark plug, out of the head, lay it on some metal part of your engine, then have a friend crank it over for a second or two...check to see if you can find a spark arking to the metal its resting on...best results are achieved if you have the spark plug laying on something NON-conducting, and the sparker end just NEAR the metal...it should ark. If you got a good eye, then hold the plug wire (Make sure you arn't holding the plug wire RIGHT NEXT TO THE PLUG...you will get shocked), and when your friend is cranking, just see if there is a spark arking between the two contacts. Low light helps to see it better.

So yeah, report back with your findings, then you can get spacific help.

[Ahmad88]

try to prime is for awhile, thats when u turn the key all the way before actually starting your car, when u can turn on the a/c,radio, etc. let it prime for awhile then turn it on, try to hold the key turned for awhile and give it some gas. maybe that would work.

[GMKC1234]

I was told that my igniter in my 90 7mgte was bad, put a used one in and still cranks but does not kick in. (kinda sounds like a car out of gas.) I have not driven in a year and I miss the road...any clues?

The mechanic I went to was pretty thorough and checked to conclude it was igniter. I tried to jump start after changing igniter, same result. Would the low battery eclopse a jump start?

Point blank it wont kick over.

[SupraSaver87]

Wait a bit longer, save some money, buy a new engine, with turbo and tranny...simple fix!

Other than that, you MAY have just gotten a bad igniter again...the used one.

[GMKC1234]

Thanks my fellow brother in Supra. The sad thing is I only have 128K on the engine. I am in NJ and i will ultimately need some one to rebuild my bottom half of the engine (rod knock wife drove it w/o oil 3 years back) Ironicly it still runs strong and hard. I am getting the batter recharged and I will check with the use of another igniter. The seller of the one I bought has a 100% rep on ebay and said if I find out what the problem is, send back igniter and he will exchange for what is needed. I have had threads come back that led me to, timing belt, starter, throtle positioning sensore, and fuel pump.

I am trying to find out who might be best to handle this in the area. The way the engine runs, as it is I can still get another 100K out of it.

Thanks for sending me in the right direction and if all else fails, another engine it will be.

[GMKC1234]

got battery charged and used a little starting fluid.......it started and then died out. My cousin came through and found it was a worn wire in the harness that extends from the coil pack. Wiggled it and bam started and stayed running.

Won a coil pack on ebay and includes the harness needed. Back in business.

Thanks