Car Randomly Dies and Starts

[SupraStorm1080]

Hey guys i have an automatic 7mgte just rebuilt the head and have new spark plugs, and new spark plug wires. The only things that i have done to my car so far is intake and downpipe, and 110 bypass valve. The car runs fine idles fine accelerates fine but sometimes when i stop it just dies on me and it won't start back up until a while later if at all, and sometimes when i haven't driven the car in a while it won't start either, it just cranks. I feel like my car has a mind of its own and likes to piss me off

When im cranking the car sometimes i hear a ping too, but when i pull the EFI fuse it stops when im cranking the car. I checked the fuel line and fuel was coming out when i cranked it so its not the fuel pump, so i was thinking its some lose wiring or the coil pack or ignition any suggestions??? :1zhelp:

Oh yeah when i put the timing belt back on everything was set to TDC but i haven't used a timing light yet to set the timing

Thanks

 

[MKIII VIXEN]

Have you checked for codes?

 

[SupraStorm1080]

oh i just checked it and right now its throwing code 51, what do i do about this i dont want my car to die again at an intersection -_-

 

[WhtMa71]

It's worth it to check for codes. While the MIL could not be illuminated, you could still have stored codes. You Ninja editor.

 

[suprahero]

oh i just checked it and right now its throwing code 51, what do i do about this i dont want my car to die again at an intersection -_-

http://www.cygnusx1.net/Supra/TechTips/engine_error_codes.aspx

This will help you and there are lots of threads on Code 51 and every other code.

Look at the bottom of this page at all the threads with the same title.........:3d_frown:

 

[SupraStorm1080]

so its throwing a code 51, so its either No "IDL" signal, "NSW" signal or "A/C" signal to ECU. would this cause the car to die and not start?

 

[WhtMa71]

Did you read under that in the "trouble area"?



* A/C switch circuit
* A/C switch
* A/C amplifier
* Throttle position sensor circuit
* Throttle position sensor
* ECU

 

[SupraStorm1080]

Yeah, i am going to go look at it to see if everything is connected

 

[SupraStorm1080]

the TPS is connected and looks clean, so it might be a bad TPS? but would a bad TPS prevent the car from running or would it just cause it to run kind of retarded?

 

[dumbo]

the TPS is connected and looks clean, so it might be a bad TPS? but would a bad TPS prevent the car from running or would it just cause it to run kind of retarded?

is it adjusted per tsrm?

 

[SupraStorm1080]

Yeah it should be, i never touched it when i rebuilt the head. I think i know why it was throwing a 51 though, when i was checking the codes check engine light was just flashing quickly like like normal but then i stepped on the accelerator it threw a code 51, but as soon as i let go of the accelerator it went back to flashing quickly haha so i think thats my bad, makes sense that it recieves no idle signal when you are accelerating.

So other then that no error codes

 

[jd_kittle05]

Mine is doing the same thing. I have an 88 7mge with 5 speed swap. Will have to check my engine code tomorow.

 

[SupraStorm1080]

do you guys know if a bad coil pack would cause this problem, or a bad igniter?

 

[suprahero]

Have you looked at any of the other threads to see what they did to fix their's?

 

[SupraStorm1080]

Yeah i have checked, some say to check timing but my car seems to idle fine and accelerate fine, but just dies randomly when i come to a stop and won't start again for a while or won't start at all from the beginning after parking. Other then that the other threads seem to have different symptoms

 

[SupraStorm1080]

so my car died again yesterday day at a stop light, it didn't sputter or anything it was kind of like someone just turned off my car, and i couldn't get it to start for 20-30 minutes it would just crank but it wouldn't fire up, i hate my life :cry: HAHAHA

 

[suprahero]

Have you checked your fuel pump relay. Mine was doing this a while back, but not to the extent yours is. Mine did it twice and I noticed the fuel pumps weren't coming on. I have the dual walbro's and you can hear them when you turn the key on. Check your fuel pump relay and I'll bet it's bad. Good luck.

 

[suprahero]

I think this is it part 28380
http://www.cygnusx1.net/Supra/Library/EPC/291410/catalog.aspx?F=8404&P=1

If you have an Advance auto parts close by here are the parts numbers for it.
R 4800
203-0058
41-5411

Those are all diferent brand names for them. It's worth a shot. Good luck.

 

[SupraStorm1080]

Thanks man ill check it out, and see how it goes from there

 

[jdub]

I would check the CPS wiring and connector...next time it does this, wiggle the CPS wires where they lead into the CPS. Someone cranking at the same time makes it easier.

BTW - A code 51 will NEVER cause a no start or cause the engine to die.