Car randomly dies, then is fine later - HELP!
07-02-09, 03:21 PM
#1
Car randomly dies, then is fine later - HELP!
Car is an 86 Streetported NA.
Rtek 2.0
Header and catback
K&N Intake
This has happened twice so far.
The car starts and runs normally. I will be driving around for at least 10 minutes and it will just die. Not stutter and die, but die like you turned off the key. Then car will not start. Everything works, the starter turns. but it just will not fire.
I wait 10 -15 minutes and the car starts again and drives normally. I had to get towed home the first time this happened. The car started right up when it was taken off the tow truck. It happened again today, and I was a mile from home, so just drove it home and parked it.
Any advice?
Rtek 2.0
Header and catback
K&N Intake
This has happened twice so far.
The car starts and runs normally. I will be driving around for at least 10 minutes and it will just die. Not stutter and die, but die like you turned off the key. Then car will not start. Everything works, the starter turns. but it just will not fire.
I wait 10 -15 minutes and the car starts again and drives normally. I had to get towed home the first time this happened. The car started right up when it was taken off the tow truck. It happened again today, and I was a mile from home, so just drove it home and parked it.
Any advice?
07-03-09, 11:52 AM
#7
No, if it was related to fuel the car would sputter or give a different symptom. This instantly dies. On top of that, he has to wait for it to cool down to start again.
Have you check any codes? I know s4 can still check them, but I forget how.
Have you check any codes? I know s4 can still check them, but I forget how.
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07-03-09, 03:43 PM
#9
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i know exactly what the prob is......the main relay right next to the trailing coils. i had the same prob. i would start it, it would run for a little bit, then just die and then not start when i cranked on it. i changed it, boom! runs perfect. take a look at that, i bet that is the problem...
07-27-09, 11:00 PM
#16
Update - still issues
Ok, so I replaced the main relay, and still seem to have the same issue.
When I swapped the relay, I started the car and it started normally. I drove it in front of my garage (a 500 foot drive) and swapped in the new relay. When I went to start the car with the new main relay, the car did not start. I put back on the old relay and the car still did not start. I waited a couple minutes, and then the car started. I swapped back to the new relay and the car started. I now have the new relay in the car.
Now, sometimes the car does not want to start when cold. After minutes of trying to start, it starts and runs.
After all this cranking over, the car never seems to flood. Could I have a fuel pump relay issue? I do have an RTEK 2.0 and I dont remember if it cuts off the fuel pump while starting the car.
Any more ideas would be great. Every time I go to troubleshoot the issue, the car starts up.
When I swapped the relay, I started the car and it started normally. I drove it in front of my garage (a 500 foot drive) and swapped in the new relay. When I went to start the car with the new main relay, the car did not start. I put back on the old relay and the car still did not start. I waited a couple minutes, and then the car started. I swapped back to the new relay and the car started. I now have the new relay in the car.
Now, sometimes the car does not want to start when cold. After minutes of trying to start, it starts and runs.
After all this cranking over, the car never seems to flood. Could I have a fuel pump relay issue? I do have an RTEK 2.0 and I dont remember if it cuts off the fuel pump while starting the car.
Any more ideas would be great. Every time I go to troubleshoot the issue, the car starts up.
07-28-09, 09:44 AM
#19
TPS seems to be fine.
I started the car this morning and drove it around the block. It seemed to run fine. I washed it, and not it is not starting again. It backfired out the exhaust when I tried to start it. I tried a couple more times and it coughed once and that was it.
I started the car this morning and drove it around the block. It seemed to run fine. I washed it, and not it is not starting again. It backfired out the exhaust when I tried to start it. I tried a couple more times and it coughed once and that was it.
07-30-09, 01:59 PM
#21
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there is a relay for the fuel pump underneath the driverside of the dash. it has a yellow bottom on it with a white/clear electrical connector. i found that those go out as well and make the car do the same thing yours is doing. you just have to be patient, rx7's are one of those cars that takes the trial and error method to find the problem. check that relay and also check the fuel injector main relay in the engine bay right behind the passenger headlight. it will either be a square looking box with a big yellow electrical connector(86-88) or it will be an aluminum box screwed to the frame with 2 bolts(89-91).
07-30-09, 02:20 PM
#23
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befor you start replacing relays i would get a big wire and bypass the relay (the bigger wires) this is just for testing thing not a lifetime fix lol
so once cuts out remove the fuel pump relay and jump it see if it fires up if it dose then plug it back in if notthing... well u get the picture... can you hear the fuel pump when you cycle the key once it shut off on you.. i dont know how loud a second gen fuel pump is as im running an after market one for my FB
so once cuts out remove the fuel pump relay and jump it see if it fires up if it dose then plug it back in if notthing... well u get the picture... can you hear the fuel pump when you cycle the key once it shut off on you.. i dont know how loud a second gen fuel pump is as im running an after market one for my FB
07-30-09, 03:18 PM
#24
I have just replaced the fuel pump, it is new. the problem seems to be getting worse as the car wont start now some of the time.
When it dies, the car does not cough or sputter, it just shuts off.
Sometimes when trying to start it back up, it will cough or pop once, which makes me think it is not getting fuel. I could splice in a fuel pressure gauge to see what is going on, and wire the pump directly to 12 volts for testing.
07-30-09, 03:21 PM
#25
befor you start replacing relays i would get a big wire and bypass the relay (the bigger wires) this is just for testing thing not a lifetime fix lol
so once cuts out remove the fuel pump relay and jump it see if it fires up if it dose then plug it back in if notthing... well u get the picture... can you hear the fuel pump when you cycle the key once it shut off on you.. i dont know how loud a second gen fuel pump is as im running an after market one for my FB
so once cuts out remove the fuel pump relay and jump it see if it fires up if it dose then plug it back in if notthing... well u get the picture... can you hear the fuel pump when you cycle the key once it shut off on you.. i dont know how loud a second gen fuel pump is as im running an after market one for my FB