car wont start!

[mattysr20]

Ok guys i made another thread a while back but i cant get any replies so i figured ide start fresh since ive done a ton since then with no results.

Ok this is from the old thread to give an idea of how it all started.....

Ok so about a week ago i drove my 91 240 with sr20det swap the car was running amazing as it always has i wasnt having any issues at all. The sr is all stock with...
apexi intake
fmic
hks boost cont
walbro fuel pump
hks hi flow turbo back exuast with megan down pipe.
So your normal mods.. anyways i drove from ohio to tennessee wich is about a 7 hour drive i stopped 2 times with no issues. Well when i got to tn i came too a stop sign and the car stalled out i didnt really pay much attention too is just figured it was the long drive. After starting the car back up i drove about another 2 or 3 miles to my moms house when i pulled up into the driveway i got it sideways a little lol then the car stalled again. I just went inside and left it i figured it needed too cool down soo about 2 hours later i get in the car it starts right up i drive about 1000 yards down the road as i turned into another road i got on it a little but not wide open as i shifted into second the car backfired then died well it was still running as i was gearing down but when i hit the gas nothing happened (motor was still running) no weird noises or anything no fluids leaking none of that.

Ok so after all that me and my buddy who is a ase mechanic for over 25 years looked the car over we could not get it to start back up. It crancked but wouldnt start we also descovered the fuel pump would not prime when the key was turned ...

Things i did...

new walbro
new fuel pump relay
checked fueses
checked power too all fuel sorces
changed fuel filter
hard wired fuel pump to battery
changed ecu
cleaned grounds
checked wires fixed what i saw
checked all plugs
changed coil packs
checked plugs
checked injectors

So after all this it still just cranks the only other things i can think of would be ignitor plug or timing.
When i checked spark i got nothing btw...

REALLY NEED TO GET THIS FIXED ASAP...

[KiLLeR2001]

ECU coolant temperature sensor (after you figure out why you have no spark).

edit:
You could try another swapping another ignitor chip. The excessive heat exposure from the long drive could have damaged it.

[mattysr20]

ecu was changed.. coolant temp censor?


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[mattysr20]

could it be my cas? how would I check that and how do I test the ignitor chip


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[brndck]

if your injectors are firing and your coilpacks sparking, then your cas is working.
the cas tells the ecu when to fire the injectors and spark plugs.

as far as i've read you haven't checked any mechanical things like compression or timing, have you?

[mattysr20]

no I haven't because it was running great then just all of a suden this. If their is no compression what's that mean? Ill check both of those my buddy said it wasn't timing.


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[mikechilds13]

I am new here so I dont have any credit for anything I say really.

I am having an issue with my stock 90 240sx not starting with no spark, and i do not know how to start looking for the problem.

I may have something that might help you as well, with the car still running and you hitting the gas but getting no response. That happend in a prelude i had and it was the alternator had gone bad and the engine wouldnt shut off until i stalled it myself. Not sure if it would be the same concept but it might be worth checking out.

[brndck]

I am new here so I dont have any credit for anything I say really.

I am having an issue with my stock 90 240sx not starting with no spark, and i do not know how to start looking for the problem.

I may have something that might help you as well, with the car still running and you hitting the gas but getting no response. That happend in a prelude i had and it was the alternator had gone bad and the engine wouldnt shut off until i stalled it myself. Not sure if it would be the same concept but it might be worth checking out.

I like your thinking.
Op you should definitely test and make sure your alternator is producing correct voltage.

[mattysr20]

I thought it would still start with a bad alt just not run because the battery would die? I've had bad altinators plus my battery was and is still good.


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[KiLLeR2001]

Ignitor chip.

http://tehl33tsite.com/240sxdd/fs/srignitor.jpg

Have you swapped this part yet?

They are known to go bad when exposed to heat.

[mattysr20]

that's my next part


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[mattysr20]

anyone have the diagram on how to test the ignitor


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[mattysr20]

also what year q45 ignitor will work


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[brndck]

anyone have the diagram on how to test the ignitor


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yes. its called "google".
this forum is not for us to hand deliver you information
it is for YOU to search and find it.

would you walk into a library and yell "ok, i'm here, YOU bring ME the info."?
No. (unless you are a complete asshole).
you would go and find the book you are looking for, and in the book is the info you need.

zilvia is the library, don't expect us to do all the work for you.

[mattysr20]

I have serched but I just figured this would be easier my bad for asking


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[mattysr20]

I bought a New ignitor so hopfully it fixes my issue cause I'm lost!! I saw some stuff about coolant temp sensors going bad could that be it?


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