jeff, if he has doubts about his wiring harness...that's a totally different animal....ya know? it could be grounding out one, two, three, or all four...at this point, without better investigative work, we won't know

and take off an 850cc injector and spray it...you'll change your mind about how long it would take to dump a few gallons out

or, do the math!

 

Absolutely. An injector fully open with the pump running will dump some serious fuel. The wiring harness could potentially ground all of them? I can see one or two on the primary or secondary bank, but all? Then again, I suppose two of them could do it if it nailed part. the secondaries.

The wiring harness in this car isn't the most pretty, I wouldn't put that past the realm of possibilities for sure.

But, that wouldn't pop the motor. How would there be white or blue smoke with just a fuel dump?

 

umm, don't even start to try and figure out where smoke was coming from, as long as it wasn't black and accompanied by flames....you're good to go

isolate the problem in this order, injector, harness, computer

once you do that, clean up the mess, fire her up and let us know what smokes, what it smells like, and from where

 

One thing that could be a possibility here:

What if any ECU wires were clipped, then accidentially ground out could cause this? The powerFC was just put in, and I know a few were cut in that process per the powerFC install. See where I am going with that? If that is possible.....

We can't do much with it until later tonight. Ben, call me if you get a chance later today. 314.504.5070; any other STL guru's that are available call me as well. I asked Mike to tow it to my house as it is close to the mechanic where it is at right now.

Jason

 

me and my friend chris *might* be able to drop by...i'll call ya if we can.

-Zach

 

Edit: Can't delete, sorry.

 

I agree with everyone here that there's no good reason to assume the motor or turbos are bad. I think you're moreso looking at a simple mechanical or electrical problem.

A buddy of mine was trying to get his 240sx running with an SR20DET engine. It would run, but it idled poorly, popped, did lots of weird stuff. Looking at the engine, we actually saw gas shooting out around the exhaust manifold to head at the #2 cylinder - I mean LOTS of gas. Shut it down, and took a look. The SR uses side feed injectors like the FD. If the O-rings are nicked or damaged, the pressurized fuel will go around the injector and dump straight into the engine - we're talking some serious fuel here! New Orings, correctly installed with a light coat of oil, and he was good to go.

You're gonna have some work to clean up all the excess gas, but take your time and test things. There's absolutely no way a "blown motor" will cause that much excess fuel - the ONLY way for that to happen is pressurized fuel to hose straight into the intake tract, either from a bad injector, stuck open injector, bad o-ring, or something REALLY goofy like a fuel line plumbed into a vacuum line.

It's a simple problem that will probably be a chore to find the answer to .

Good luck!

Dale

 

Hey all, thanks for responding. I'm the one with the fuel in the y-pipe. 93BlackFD, I think your diagnosis is right on the money. I don't think the motor is popped. There is a black wire @ the wire harness that had a break in it and we tapped it up, I'm wondering if the tape fell of or there was another break in a wire we missed that is grounding out the injector to stay open. I've looked at briefly this morning and with turning the accessory on, it still is putting fuel into the Y. So again, 93BlackFD, nice diagnosis.

 

yeah, no problem, we're getting an S13 SR20DET to run today in an S14, i modified the harness myself (PITA) and it won't start

we narrowed it to bad plugs, we got some new ones now, just have to gap them and give her another go

that'll be one FD and one silvia in the same week i'm becoming good at this

 

One thing I forgot to mention: THE ENGINE IS UNDER WARRANTY, AND HAS 78K MILES ON IT.

It may not be popped, but the ENTIRE thing is full of fuel--pipes, lines, everything. we could tear the entire motor apart in attempt to diagnose it, and still *maybe* get the same motor to work, and if we can't get it to work then you turn it into the warranty co. If you get it to run, it's still got 78k on it. I think it needs to be turned into the warranty co, as a fire hazard, personally--

thanks for everyone's information.

-BN

 

Nope, warranty company has supposedly liquidated.

That SUCKS.

 

Just siphon out all the excess gas - shouldn't be that big of a chore. Make sure to disconnect the battery, and keep away from flame while doing so! Gas is relatively easy to clean up, and also evaporates nicely .

It will be a chore to clean up all the gas, but nothing THAT big.

If you get most of the gas out of the intake manifold with a siphon pump or the like, remove the leading spark plugs and slowly turn the motor over with a breaker bar on the front pulley (turn the motor clockwise, BTW). That will pump the gas that's in the motor out of the leading plug holes - just put a catch pan on the ground to get it. That will also pump any excess gas out of the lower intake manifold that you can't get to.

I would also change the oil before firing it up again - you've probably diluted the oil pretty good.

I really don't think you'll have many problems getting it going again. Just take your time and you'll be fine.

Dale

 

Your only option is to get the fuel out one way or another. Pull your fuel rails off/turn your key on and see which injector it's coming from. Then go from there. The motor is most likely fine. I'd offer to come over to help but I'm elbow deep with other projects right now.

 

yeah, you're making a mountain out of a mole hill here...the motor is fine

and you don't take apart motors and reassemble them...you rebuild them, it's all or nothing

 

 

why is that funny?

i'm referring to anything involving taking out the tensioning rods

 

I'm agreeing with you.

 

I did the math, you guys are right. If ALL the injectors were opened up and the pump could pump that much fuel a minute you'd end up with 1.6 gal in the motor in ONE minute...

If the motor is full of fuel remove the battery from the car. Remove plugs, IC and piping, remove exhaust. Turn the motor over by hand, change the oil. Wash out exhaust and IC and piping with water. Remove inlet pipes to turbos, blow out with compressed air.

Reinstall everything, make sure you don't see/smell gas anywhere, start it up.

Jeff

 

woah, you don't wash anything out with water....compressed air only, if you *must* use mineral spirits (paint thinner) as it evaporates very quickly and eats petroleum based substances

 

Well, problem solved....

It was just a bad injector, once the ignition was on, it just open fully and just *dumped* fuel into the manifold. We swapped the injectors just to make sure the 'leak' followed the injector and not the wiring, just in case.

New one is on the way...

Mike (FormulaMazda) Ben and I thank you for your help. (Its Mike's car that had the issue)

Later- J