dsm shut down... help please!!!!

[jdunbar10]

ok so i got my talon up and going but now it keeps on dying. no check engine light and really just dies when ever it wants to

it starts right back up in 5 mins of sitting. it dont over heat or anything so im pretty lost

anyone have a idea what it could be?

no over heating, randomly shuts down, sits for 5 mins and starts back up like nothing ever happend...

ment to add that i dont have my wideband set up yet...

 

[gofer]

Nobody here, atleast anyone that I know of, could even give you a good guess as to what it could be. There are so many things that you can do to narrow down the problem.

When you turn the ignition key to the "ON" position does the CEL stay illuminated for 5 seconds and then disappear? If the answer is yes then you can eliminate the ECU as being the culprit (for now) and move onto checking the spark.

There are a few ways to check spark but I remove a plug, connect the plug wire back up to it and lay the plug across a good grounding point. Then, while someone else cranks the car, watch the gap between the electrodes and confirm that you're seeing an electrical arc across this gap. If you get a good spark on all (4) spark plugs and they look like they are in good shape then you need to check your fuel delivery.

You need to make sure that the fuel pump is pressurizing the fuel rail. Hopefully you have a fuel pressure gauge for this purpose. If not, you can disconnect the fuel return line from the pressure regulator and run it into a gas can or something to confirm that fuel flows out when the pump is activated.
*IF THE MOTOR IS GETTING FUEL TO THE RAIL GAS WILL COME OUT OF THE LINE JUST CRANKING THE CAR OVER SO BE CAREFUL.
If you get gas to the fuel rail you need to make sure the fuel injectors are working. I just put in ear up to them and listen for them "clicking" while the cars idling...

These are just the basics for troubleshooting a no start on ANY car. Your Talon is turbo and also needs a boost leak test done to it. Personally I'd do this first to make sure everythings tightened down and you have NO LEAKS. This will also cause your car to just "die" like you said...

Good luck and keep us posted with what you find. That way once you start using the process of elimination we'll be able to help you further.

 

[jdunbar10]

well its been doing this with 2 ecus and the light works so its not a ecu problem

and checked the easy way with break cleaner and soap to find one small leak on the BOV but i know that cant be the reason im only getting 10 psi of vacc.
i cant really seem to see any leaks anywhere...

im running bc 272s btw for cams

will be checking the rest of your list tomorrow, it was yes a basic start of looking just didnt get around to it all today

and tomorrow i pick up a wideband to get a lil more info to help me

 

[918dsm]

usually if it takes 5 minutes to start back up it something in the electronics.. maybe coil's or ecm something is getting warm and shutting down. well that;s just my previous experience. check for fire after it dies... it's a good start

 

[Gasolinebaptism]

Something is getting hot, and throwing resistance out of whack.
Try plug wires. that's my best bet, and halfway cheap at that.

 

[2gGSXEclipse]

Could be anything. Possibly oil pressure sensor?? My F350 use to shut down because that sensor went bad.

 

[gofer]

Could be anything. Possibly oil pressure sensor?? My F350 use to shut down because that sensor went bad.

1g's have an oil pressure switch but it wouldn't keep the car from idling, the symptoms of a bad one are low oil pressure.

 

[jdunbar10]

so since i decided that im stuck waiting till the weekend for a new o2 housing i decided #### it and my new turbo set up and intercooler set up and fuel system goes in then ill deal with my shit

 

[DSMopar]

Ya, toss mods on top of an existing problem that's the way to go about fixing it .

 

[jdunbar10]

Ya, toss mods on top of an existing problem that's the way to go about fixing it .

the whole car is down due to waiting for a down pipe... so why let it sit un touched?

 

[Cal1089]

hard to let it sit when you just have ideas flowing in your head.

 

[jdunbar10]

hard to let it sit when you just have ideas flowing in your head.

and when you have all these extra parts sitting waiting

 

[jdunbar10]

so a little bit of a update since i put in the new turbo setup, dsm link, fmic, new o2 sensor, and new CAS

its still dying after 10 mins or so and starting up few mins later like nothing happened!!

it turns over, will crank but wont kick over...

 

[2qik4u]

like previously stated as soon as the car dies pull a plug and check for spark. if it doesnt spark get out the multimeter and start checking things in the ignition system for proper voltage and resistance.

 

[Gasolinebaptism]

This might not have anything to do with the issue, but since you have upgraded thinks, namely the cams, have you adjusted the BISS?

 

[liquidz28]

:make sure your battery terminals are not touching ANYTHING, if positive makes contact with anything the car will just shut right off, that would be my first guess, so check down by the starter, check all unfused 12volt leads, check your fuse box for the ECU fuse, if thats loose and or dirty the car will shut right off...
easiest way to figurre out electronics is unplug stuff you dont need and mark the plugs so you can systamatically plug them back in later, my car would go lights out whenever i hit a pothole, turned out to be the positive cable all the way down at the starter, was just wiggeling enough to arc...would litterally shut my car off instantly...was actually kinda funny ### it took me 2 months to find it..

THIS SHOULD MAKE YOU FEEL BETTER!!!

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crap. i keep thinkin of stuff...
make sure your MAF plug is secure, sometimes they will get loose (wont allways kill the car but can if your BISS is on a lower setting)

 

[jdunbar10]

ok so new update and still nothing....

so still dies after about 10 min of driving...
i have changed the ecu, the o2 sensor checked the wires for the coolant temp sensor changed the CAS sensor, changed the maf sensor and replaced it with the translator, and now today just took it out for a rip trying to kill it also checked each plug for spank and yes i have spark right after it dies...

i am possible leaning towards fuel filter/ fuel pump??

 

[gofer]

ok so new update and still nothing....

so still dies after about 10 min of driving...
i have changed the ecu, the o2 sensor checked the wires for the coolant temp sensor changed the CAS sensor, changed the maf sensor and replaced it with the translator, and now today just took it out for a rip trying to kill it also checked each plug for spank and yes i have spark right after it dies...

i am possible leaning towards fuel filter/ fuel pump??

I'd check the wiring/test the ignition coil, seems like that would be the next likely thing thats causing it. I know you said you've checked for spark immediatly after it dies but how? If I were you'd I'd find an old spark plug laying around or go get a cheapy from the auto parts store. Go for a drive with a friend and when the car dies pop the hood and grab your spare spark plug. Just pull each plug wire off at a time, grounding it to the valve cover while your friend tries turning it over. Even if there is spark there it could be to weak to ignite the fuel after the car starts heating up.

You might want to test your MFI/Fuel pump relay as well... http://www.dsmtuners.com/forums/newbie-forum/263224-mfi-mpi-relay.html & http://www.dsmtuners.com/forums/newbie-forum/276071-mfi-fuel-pump-relay.html for further guidance on that.

 

[jdunbar10]

changed the 190 fuel pump to a 255
put in a new ecu (dsm link)
changed CAS
changed o2 sensor
regrounded the coils
checked coolant temp sensor
changed maf sensor
then replaced it with maf trans
got spark after it dies...

since i had the chance i changed out the bc272 cams to comp cams 300 series

tomorrow i check the mpi relay.

anyone kknow if a non turbo and turbo fuel mpi relay are the same or do they change??

 

[dsm8883]

I have to say in your case and some like yours, you should have taken it to a (proven) dsm shop and had a diagnostic done. Throwing parts at a car is the worst thing you can do you may change a good part out with a bad part and add to your hell. Most good shops charge 85-150 for a good diagnostic and check over. I have fixed a lot of cars that customers have thrown parts at and spent 100's of dollars and it end up being something dumb.

 

[jdunbar10]

I have to say in your case and some like yours, you should have taken it to a (proven) dsm shop and had a diagnostic done. Throwing parts at a car is the worst thing you can do you may change a good part out with a bad part and add to your hell. Most good shops charge 85-150 for a good diagnostic and check over. I have fixed a lot of cars that customers have thrown parts at and spent 100's of dollars and it end up being something dumb.

there are no good dsm shops around closest one is like 6 hours away

 

[dsm8883]

there are no good dsm shops around closest one is like 6 hours away

That sucks a big one.

 

[gofer]

there are no good dsm shops around closest one is like 6 hours away

Wow, I wish I had that many Mitsu dealerships near me... no reputable shops near by huh? mitsubishi edmonton, AB, Canada - Google Maps

 

[nothingfiction]

E-town? Dudes not too far from me. i'm going to innisfall this wekend

 

[jdunbar10]

Wow, I wish I had that many Mitsu dealerships near me... no reputable shops near by huh? mitsubishi edmonton, AB, Canada - Google Maps

mitsu dealerships around here are a joke really im not kidding no one really would trust them with a peddle bike...

changed the 190 fuel pump to a 255
put in a new ecu (dsm link)
changed CAS
changed o2 sensor
regrounded the coils
checked coolant temp sensor
changed maf sensor
then replaced it with maf trans
got spark after it dies...

and work today...
changed coils
changed mpi relay
changed power transmitter
changed fuel filter

still dying.......