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-   -   No fuego (in English) (https://www.rx7club.com/new-member-rx-7-technical-256/no-fuego-english-1063104/)

Hesstopher 05-04-14 08:51 PM

No fuego (in English)
 
Sorry if title confused, I live in South Texas and like to jokingly use Spanish even though I don't really speak it.

The facts--
87 na 13b, rebuilt, half bridge port, and fuel pump kill switch added 290 miles ago. Oil changed at 250, 20w50 conventional used. Car was purchased used with an air temp mod, OMP delete, and AC delete as only engine mods. I reinstalled AC but haven't attached belt as I need to prep and charge the system first. Religiously use tcw3 premix (1oz/gal premium 93).

Problem--
Drove fine on Saturday, parked it and 4 hours later when I tried to leave for a meet, it spun but no fire. No fuel smell to exhaust, otherwise normal spinning except lack of fire. Tried fuel pump on & off with no difference.

What I've tried-- fuses, relays, compression (auditory, pulled plug and cycled hear the compressed air escape hole), pulled supply at fuel rail and dumped to empty bottle to confirm fuel pressure at rail. Noticed the air temp connection had come off (poor wiring job) and a small vacuum hose on manifold had come loose-- both fixed with no change to situation.

Whatever the problem is, it was sudden. If it occurred while driving it was minor minor enough to not effect a running engine, but significant enough to keep a cold one from even trying to fire.

I'm out of ideas. Didn't confirm spark, but based on the smell at tail pipe, there is no fuel in engine. The only thing left would be injection system-- but both rotors at same time? Fuse was good, unless there's a specific fuse hidden somewhere. I checked by pedals and by driver wheel in engine bay.

satch 05-05-14 07:17 AM

Jumper the fuel check connector.

ACR_RX-7 05-05-14 11:40 AM

Check for spark. The main efi relay next to the trailing coil may have failed and is not allowing power to the pcm and coils.

Hesstopher 05-25-14 11:28 AM

Sorry to be so late on this. Wanted to conclude the thread.

So, while it was being rebuilt nobody checked the bearings. They needed to be replaced-- they failed during break-in which lead to a cascade failure resulting in a damaged shaft and rotor gears.

Warranty work was done by the mechanic (thankfully) and all bearings replaced, shaft replaced, gearing replaced. Rotor and housing somehow managed to not be damaged.

Car is back on the street and running with excellent compression-- on to the other problems.


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