I just installed an ultimate fuel system, sent my ECU off to rx7store to get it tuned for injectors, put everything back together, and car WON'T start, but it'll crank. Replaced the plugs, then tried starting it again, but only got crank, then pulled a plug out and it's wet. The car is only firing a few times. I also put a new battery in it today, still won't start. I need help very badly, any help will be GREATLY appreciated, thanks.

 

What size are the injectors?

 

850's and 1600's

 

I would replace the plug than use starting fluid with the fuel pump relay taken off, put it back once the motor starts.

 

Alright thanks i'll try that.

 

Any other reasons why it won't start?? I'm desperate for help right now lol.

 

check if the ecu is plugged in properly.. had the same problem and a socket wasnot plugged in properly

 

ecu is plugged in properly, i checked.

 

is the engine flooded by chance?

 

How do you tell if it's flooded?

 

it would crank slower than normal.

It wouldn't hurt to try deflooding either way, you don't stand to lose anything by trying. Except maybe a half hour of your saturday.

http://www.fd3s.net/starting_flooded.html

 

First rule of thumb, check for the three ingredients in a running motor, spark, fuel, compression.

Since the plugs are wet, you have fuel (maybe too much).

Next, check for spark. Pull fuel pump relay and Remove a plug and ground it to see if there is spark when cranking. No spark=electrical issues with ignition. (watch for gas coming out of the plug hole, don't want to catch everything on fire!!!!) Make sure you don't pull the ignition relay that kills igniters as you may think you don't have spark, but actually would. You could also remove plug at the fuel pump to make sure instead (located under hatch carpet, drivers side corner).

Lastly check for compression. With the fuel pump relay pulled, remove top or bottom plugs (only one on each rotor) and have someone crank over. Check for three consistent swoosh sounds and/or stick finger over hole to see if compression "feels" equal. If there is one or two dead sounds out of three, then it is a motor issue, possibly blown. A compression test can be done with a regular compression tester, but the tire valve needs removed. Looking for three even compression bumps per rotation.

If I were a betting man, I would say that the injectors are flowing way too much causing the plugs to foul out. Once they are wet, they don't arc as well. Use a propane torch to burn off and dry them out before reinstalling. Also, you must "unflood" the engine by removing plugs, disconnecting fuel relay, and cranking over with throttle wide open (lets fresh air in to push out fuel flooded air) until the unburned fuel appears to have dissipated (clouds of gas mist come out, so put a rag over the plug holes to catch most of this). Remember, no open flames or this gas could explode.

I would then try the starting fluid that jamespond24 mentioned, but before doing that put about 1 teaspoon full of ATF or marvel mystery oil in the plug holes on each side of the rotor face and rotate engine around a few times (aids in compression sealing since the flooded gasoline will most likely remove any oil seal that you had).

While cranking over, spray some ether or starting fluid into the intake plenum (disconnected from the intercooler to the intake). If it fires off, you know you have adequate compression and spark. Put relay back in and with no throttle, try to start again. If they flood up again, then most likely there is something wrong with the injectors (bad seal, leaking, stuck open).

My guess is that one or more of the injector seals is not sealing properly and gas is flooding into the engine. If this is what you suspect, do a fuel pressure leakdown test to verify this before tearing it all back down. Use new injector seals if this is the case.

Good Luck
Tim

 

Thanks i'll try that also.

 

Ok I tried flooding my engine, turned out it's NOT flooded. So that is out of the picture...any other opinions?

 

Did you check for spark?? Pull the FP relay, pull out a plug, put the plug in the wire and ground it on the strut tower or something..Look for spark, obviously. Also check your grounds and make sure your coils are hooked up properly..Also the spark plugs wires are on the right plug.

 

I've got spark, compression and fuel. Only thing I haven't checked for is ground. Also the plug wires were on correctly.

 

Any other ideas? I want my car running soooooo bad it's been 7 months, lol.

 

How long has the gas been in the tank? It can't hurt to siphon out as much as you can and then put in 10 gallons of good stuff.
I don't really think it could become that bad in only 7 months, but it's worth a shot...

 

I bleeded the old gas out, and put 4 gallons of fresh premium gas in, and it was bad.

 

Ok now I don't have spark wtf?