Ok..so I'm posting this for a friend of mine without internet access. He has an 86 na car that has been apart for a year and a half. I don't really know enough to help him either. Just recently he changed the fuel rail. Now its all put back together and it will crank, but not fire. The coil packs were tested and the car has spark. There is also fuel pressure. Ok...so from what I gather there is spark and fuel.....why no fire? Does anyone have any ideas? Also is there anyone with any expertise on rotarys in the Ohio area?

Timing???

Timing, absolutely. Before you do anything else make sure it's properly timed.



Need more information about the fuel rail swap.



Why did he switch fuel rails? Is the intake completely stock? What kind of fuel pressure do you have? Fuel pressure is awesome but you're not going anywhere with 4 pounds of pressure when you need 40 or better.

The fuel rail is a stocker off another 86. It was changed due to a pinhole in the original. It was all put back together and now it won't run with the new fuel rail. How can we go about timing the car if it won't start? https://www.nopistons.com/forums/pub...1047683561.gif

Make sure he didn't get the lines backwards IE the fuel will only flow one way. If the lines are put on wrong it won't start.

yea im with dac, backwards fuel lines is my guess.



kevin.

Ok.....so we spent another 4 hours looking at any possibility we could think of. We even made a jumper to run the fuel pump constantly for 30 seconds....the fuel is there. We also checked spark...its there and blue. The injector resistance is good. I'm at a loss. I'm racking my brain and can't come to any logical answer. I need someone there with us that has a fresh outlook and might pick up on something that I'm overlooking. S.O.S!!!!!!!! I'm getting desperate here.

I keep thinking you got a problem with the FPR, you never mentioned how much fuel pressure you had.



I mean if the FPR is dead, sure the fuel will be moving around and piss out the lines thanks to the fuel pump, but that's not an accurate way to check for fuel pressure. That FPR might just be letting the fuel go right back to the tank without any real pressure being built.



Make SURE you got ACTUAL fuel pressure.



It's hard to make injection pressure when the fuel pump is just cylcing fuel through the lines and straight back to the tank without any hold-up at the FPR.

Ok...well my buddy's step-dad is changing the FPR just due to the fact that is 22 years old. I wasn't able to go work on the car today. We appreciate all input. I'll be posting updates as soon as I find anything out.

https://www.nopistons.com/forums/pub...#>/biggrin.gif Ok so the fuel lines were crossed with the feed going thru the fuel rail directly back to the tank. Whoever did the work was not paying attention. I just fixed it. lol So the car will run, but now it acts like there is a nasty vaccuum leak. Oh well that is minor. Another Rx-7 lives to make a fellow rotard happy again.