Hi,

I've got a 1990 rx7 gxl N/a with a problem starting. Here's the backstory:

I bought the car in february with a blown motor. Found a used 91 n/a motor with good compression ready to basically "plug and play." I swapped in the new motor myself, and did a pretty thorough job of replacing old gas lines, cleaning injectors, cleaning plugs, new mounts, new filters, etc...

Car ran pretty well for a while, and I tinkered and tuned it to a point where I could drive it daily for about 3000 miles.

Last friday, the tank got awful low, and it seems like a bunch of crap from the bottom of the tank and killed the fuel pump and filter. Added gas, and fuel pressure just drops slowly as the car idles, then the car dies. So the car would run for about 20 seconds, then die.

Take it to a shop, and the pump gets replaced. Full fuel pressure, good spark, good compression, and we can't seem to get it to start up. Continues to flood itself. TPS was set to a smooth (albeit high) idle before the car died, spark plugs were good (new leading, trailing plugs were new as of the engine swap 3000 miles ago).

I'm a bit removed from the situation as it is in a shop, but is there anything you guys can think of that would cause this? Something stupid between myself and the mechanic that we're forgetting?

Any help is appreciated.

Thanks,
Jimmy

 

Do you hear the fuel pump at all while the key is turned?

 

Yes.

With the yellow fuel plug on pass. shock tower jumpered and key set to "run" there is a whirring from the pump and positive pressure from the pump.

A couple days ago he could get it running for say, 20 seconds or so, at a time, during which the fuel pressure stayed constant at ~40 psi.

 

I'm having the same problem. And I think it's because of the fuel injectors being leaky or malfunctioning. I can unflood my car and start it but then it dies out of nowhere and wont start on the next attempt. Pull a plug and it's gunky black stuff and smells gassy.

No one has replied to my post, so I can't say for sure that's what it is. But you can have em serviced for like $18 an injector if that does turn out to be your problem.

 

Oh and as you mentioned your car only ran for 20 seconds at a time. This will cause it to flood if the car never gets to warm up.

 

After enough attempts, it gets warm (like the halfway up the guage warm). But I think it's still on the still on the stupidly rich stock starting map at that point, so it could still be flooding. These are original injectors, but i don't think they're the issue, unless the crap being sucked into the filter got to them and caused them to leak...?

Thoughts anyone?