Alright I've been trying to figure this issue out for quite some time now and have decided to get some other input as to what might be going wrong here. This all started one day when I parked my FC over night and when I went to start it the next day it would crank just fine but it wouldn't ignite. I concluded that it was the fuel pump so I installed an OE airtex pump and alas it started right up. I took it around the block and afterwards parked it. The next day I went to start it up and it wouldn't start, just as if I hadn't changed the fuel pump. I even changed the battery just for fun and that did nothing. I'm thinking it might be the fuel pump relay but I'm not sure. Any help on this would be great, thanks.

 

Could be flooding from leaky injectors. Could be something with the spark cutting out. Sounds like you need to do some more testing to narrow it down.

 

Considering this is a TII, it is equipped with the fuel pump relay & resistor. The fuel pump relay and resistor should be bypassed and the pump needs to be rewired. Whether this is your issue or not, this is for safe measure.

Here is a link that will provide you with good information on how to do this. (PLEASE read everything very carefully. You want to ensure that you do this properly.) -> https://www.rx7club.com/2nd-generati...rewire-732904/


If you're wanting to check the fuel injectors for leaks, strap/secure the injectors to the fuel rails. Unbolt and remove the fuel rails with injectors still strapped to them. (There's an illustration of this in the 88' FSM. "Fuel and Emission Control Systems" 4B-74) - Obviously you do not remove the injectors or any of the fuel lines. Be sure to set some rags or something under the injector's fuel outlet nozzle, to absorb fuel in case they are stuck open. Turn the key to "ON"... Not to "START". Now, jumper the yellow fuel pump test connector at the passenger side strut tower, near the AFM. You will hear the fuel pump running... You now will be able to see whether or not the injectors are spewing/leaking.

If you do not have a Factory Service Manual, here is a link to the 1988 FSM "Fuel and Emission Control Systems": http://foxed.ca/rx7manual/manuals/19...TEMS_TURBO.pdf

 

Id be more inclined to think that its the relay/resistor, however, everything is stock so would a bypass really be necessary? thanks for the replies.

 

Just read the reasoning behind it. (If you don't feel like reading... I'll give you the answer.) - The fuel pump relay & resistor are just another fail point. Fuel pump cuts out, engine goes boom.

fuel pump rewire

https://www.rx7club.com/power-fc-for...istor-1002411/

 

Yeah that makes sense. But the weirdest thing happened, I went to go start it up just for the heck of it and it actually started, I even did this multiple times and it worked. Im not sure what this means, if someone could shed some light on this that would be great.