ka-t now wont start DONT UNDERSTAND???????????

[zack240man]

whats up guys. I took my cousin for a ride in my 240. We made it like 1/4 mile and all of a sudden the engine just freaked out. Its kind off hard to explain so I'll try my best. I was hitting about 70 mph with half throttle, and suddenly the car started to decelerate. I gave it more gas, but no effect. At first i thought maybe coupling had came loose, but usually when that happened i can keep the rpms up enough to get the car out of harms way, this was different, as soon as I put it in neutral and gave it some gas the engine choked out. I couldn't get car to even try to crank, nothing at all. I checked the fuel pump fuse and i can hear it cut on. Checked for spark, all good. Checked all major wiring to allow car to run, all good there. I know the car is getting fuel from the smell. The car was running fine the week before, only one problem starting. For reference here is my setup.

14b turbo pushing 5 psi safely stock injectorsstock mafstock o212/1 fmutiming chain was slightly rubbing at 2800 rpm, but is still pretty new

Please help guys, this is a daily driver, any ideas are good ideas.

[WDRacing]

Ok, so the car is back at your house now? Does the motor turn over with the starter?

[HPmakesMEsmile]

Yeah I'm guessing the engine still cranks- you cant check for spark if it doesn't. If the engine fails to crank, fuel pump and spark would be the last things I check.

I dont mind helping you out, but we would need alittle more information on the situation. Otherwise I could write you a whole Chilton Manual on what it could be.

[WDRacing]

I couldn't get car to even try to crank, nothing at all.

That's why I asked...

By checked fuel and spark I was grabbing at straws thinking maybe he checked just the fuse and just pulled the plugs to see if they were fouled. But like you said, the description is a tad...limiting as far as actual diagnosis is concerned.

[Florida240sx]

Ign fuse.... ECU get power? You even have a battery left? Maybe alternator went bad, or fuse popped... My alternator belt was loose and cause me car to drain the battery and leave me stranded the other night

[zack240man]

the car wants to start. I can set there and turn it over all day. New battier and about 200 miles on new starter. I checked the plugs, they looked alright. I got my cousin to turn the engine over to see if the plug wires would arc, ever thing was good. I haven't checked to see if the ecu is working, how can i tell if it is? Also we tried push starting it, we rolled it down a step a$$ hill on the way back to my cousins house, we had to have it going at least 15 mph and it would sound like it was trying to crank but she just wouldn't do it. one more thing I noticed the fuel smell was quite strong (also the car does have gas in it). Could a broke fpr be the problem? Another thing, could the timing chain broke, I'm pretty sure there would be quite a lot of noise, and a lot of damage.

[HPmakesMEsmile]

In my experience if your timing chain broke, you will definately be hearing a difference while cranking it over. Some cylinders will be compressing and some will still have valves open or "bent." A fairly easy way to check would be to pull off your valve cover or front timing cover. Of course if that is the case then your going to need some head work.

Check all of your fuses first. I'm not sure how to check and see if your ECU is working properly, but there must be another 240 around you could swap the ecu out.

[zack240man]

Yeah i dont think it is the timing chain unless it possible for it to jump timing so far the car wont run. Sadly a ecu swap from a friends 240sx is not possible for the simple fact that i live in bum f@$k central. theres only one other 240 in my town and some old lady that i dont know owns. Isn't there suppose to be a light that comes on if you set the ecu to trow codes? If that light comes on, does that mean the ecu is good? Also i had a brain storm, I had an issue with my roter button stripping, this cause an arc but would allow the car to run because it was slipping. i get off work in two more hours so i will check it out. Any more ideas or thought would help. Any ideas on the fpr being the problem :

[Brandon93240]

Rent a compression gauge and check your compression. Sounds like your engine could of taken a dump. Also to the previous poster you don't have to pull the vc to see the cams spin, just remove the oil fill cap and have someone crank it while looking in with a flashlight. In all my years at Nissan and since I haven't seen a dohc ka jump time, not to say its not possible, if something was loose(tensioner bolt, etc)anything can happen.

[h-eater240]

check the fuel supply and return lines on the underside. just in case.

[duveeka24det]

Is ur FPR stock?I dont think ur FPR would cause ur car to not crank. If ur FPR was not working and not lettin gas back to the tank it would cause fuel to be forced into ur injectors causing ur car to run rich... But if it was to be stuck open which, I seriously doubt could happen u could kink the return line and then try to start it..I'm not sure but I think u need ur ecu to get spark. I believe thats what sends the signal so i'm guessin ur ecu is fine..Might need to check ur compression.. I blew a ka24det before and it died like the one ur talking about... and after. It wouldn't start it would just turn over fast..because I blew the rings out...

[clss240]

compression check would tell you a lot, are your plug WET with fuel after cranking with the key on? also for some reason, my car wont start unless i use the key. i tried turning the key to on and cranking it via the starter and it wont start.

[240sxvaj]

I been through the same crap, it sounds like fpr is bad. this is what you do, unplug one of the fuel line, the one on top of the fuel filter and let some gas out then try to start it. Make sure you do not press on the gas pedal and just start the car. If it starts right up then the fpr is bad. when i went through the same thing, right were the injectors are you would be able to smell fuel.

Also injectors may crap out on you like what happened to me.when i went ka-t, i was using stock injectors and walbro pump, all of a sudden while cruise at 70mph the car just decel and as i gave it some gas nothing happened. lucky i had new 450cc dwerk, installed it and problem fixed. next when i was on the way to dyno shop the car just stalled out for no reason and it wouldnt start back up, there was a very strong smell of gas and did that method like on TOP and everything worked out fine.

Could be a variety of things with the fuel. make sure fuel lines are all good.