My mk3 wont start please help - Intermittent ignition problems
 

I HAVE A 89 SUPRA WITH A 7MGTE TURBO THE CARS RUNS GREAT BUT NOW IT WONT START EVERYTHING IS FINE BUT IT SEEMS THAT ITS NOT THROWING ANY SPARK THE CAR WAS RUNING GREAT BUT I RAN OUT OF GAS I WHENT TO GET SOME GAShttp://www.toyota-supra.info/forums/...res%5Cvalentin AND NOW IT WONT START I NEED HELP

Do NOT post in all caps! It's rude... the accepting internet equivalent of SCREAMING.


How do you know you're not getting any spark?

The fuel system can take a minute to prime. If it doesn't seem to be priming from cranking try inserting a jumper (a piece or wire or a paper clip will do) in the connector for FP and the other end in the connector for B+ in the Diagnostic box. It's just above the engine bay fuse box and is labeled. There is a chart in the lid of it showing which connector is which. Jumper those two, wait 30 seconds to a minute and try cranking the ignition again.

Do NOT leave the jumper in place for more than a minute or two at a time; You don't want the battery to get drained needlessly and you don't want to overwork the pump if the problem lies elsewhere.

i cheked every thing i took out a spark plug wire and cranked it and no spark

ill try what u said

my supra wont throw any spark
 

my 89 supra starts sometimes then it doesnt it wont throw any spark what is it

help please

Please do not create multiple threads for the same problem. It makes it harder for us to help you as it is harder for us to know what you have tried and what precisely is going on with the car.

I'll merge this thread with your other one.


Meanwhile check the ground wire running to the coilpacks for deterioration and corrosion. Check the ground wires which connect to the head on each side. Check for stored diagnostic codes. I'd also go and replace the EFI fuse, even if it looks good.

my car wont start
 

i did everything in my car but it wont start could it be the distributor or the coils cause it has no spark oh yeah i checked my spark plugs and the all have oil could it be that

you said no spark? your sparkplugs all have oil in them?
i did a recount of your other topic posts..
do you have no spark at wich of the fallowing locations
Plugs.. coil.. points.. distributor.. ignition coil

read this. then let us know
http://www.nls.net/mp/volks/htm/spark.htm

just a basic spark test at various locations

http://www.toyota-supra.info/forums/...-problems.html

dude u already got a thread about this...
your problems dont get solved when people have to tell u not to make multiple threads....

if an engine cranks but will not start, one of the first things you should check is spark. No spark at any of the plugs usually indicates an ignition problem that requires further investigation (a bad coil, ignition module, distributor pickup, crank sensor, etc.).

Fouling can occur if fuel or oil deposits build upon the plug electrodes.

Worn valve guide seals and guides can allow oil to be sucked down the guides and into the combustion chamber. A heavy buildup of thick black deposits on the plug and intake valve
would indicate such a problem. Worn or broken rings, or damage to the cylinder wall can also allow oil to enter the combustion chamber and form ash deposits on the plugs.
http://www.aa1car.com/library/sprkplg2.htm
brief spark plug lesson.. do you have any of those symptoms?
next time merge them in the Original Thread!
also do a google search with NO spark AT and click on the suggested sites. preform those tests, if still nothing come back with more info on what you did. what your car is doing. in the same thread. don't start a new one. =) let us know

You should keep posts about a problem in the same thread. Not doing so makes it harder for those trying to help know what's gong on and what has been tried.

I merge this with your other thread... I'd appreciate not having to do it again.

maby its just a bad mk3....
hahaha....sry
your battery isnt dead is it??
just a thought...

i also need a turbo mine gave up who is selling one for cheap

You will have better luck posting this in the "Parts Wanted" section of the forum. also the words turbo and cheap really don't go that well togather. When moving your post to the "wanted" forum add how much your willing to spend. stock referbished turbo I would be expected to pay 200 or more. (just what sounds resonable to me). also, how goes your engine trouble you do any checks? what were the results. one problem at a time man

oil on the spark plugs? isn't that indicative of oil seal or valve gasket leaking? If I remember correctly, Turbo engines generate their spark from the CPS (cam position sensor) rather than a rotor in a distributor cap. I'd have to imagine it could be timing, could be a bad sensor, even seized cams.

Also, if you're not getting spark, you might want to check components in the ignition system prior to the inner workings of your cylinder... battery, starter, etc.. hoping that any discrepancies in my statement(s) will be corrected by those who know better... so not only might this be helpfull to OP or anyone else doing research, but also educate and correct my misconception(s).

I did a quick search for "no spark" and came up with the same things. I doubt he did any troubleshooting cause he never replied. instead just asked for a turbo. I hope he does do some testing and posts about it. I'm terribly bored and would like something to research on, both for his knowledge and mine.

ok i fixed my car all i needed was a new battery fixed my turbo but now it lags boost when i step on the gas it goes but then it starts to bog and it starts to backfire why

possible o2 sensor or otherwise clogged exhaust system, or possibly your timing (can't remember which type is which, sorry)

i changed my piping so its not that i put 3 inch straight piping no cats

glad to hear the problem was at the battery. could of been able to asses that problem if you described what your car was doing in the process (ie. slow crank at start up) instead of (no start) that is most def a batter problem. I guess I coulda offered that as a suggestion to start with but decided to skip the ez things figuring everyone knew what a dead battery sounded like.
to start, what did you do to fix your turbo? What exactly was your tubo doing that required fixing? booste leak + over rich fuel spray can cause turbo bog and backfire I supose. as the post above says "check your timing" and pull the codes to see whats going on.
and like always, don't create multiple threads asking the same questions. your problems won't be solved. its just annoying.

my old turbo was passing oil and my car started to throw smoke and i got a new turbo how do i check for codes