Gasoline FLooding I believe

Reaver19 · Post by **Reaver19** » October 20th, 2005, 9:27 am

Alright, now I'm getting mad. I have a KLDE engine in my 93 mx-3. The problem I'm having is this...if I start the car up after it's been sitting for 2 days and all the excess gasoline has drained then the car will start, idles perfect, sounds perfect, drives perfect. Then if I let the car sit for a few hours and I start the car it's really bogged down, like it's flooded with gasoline, and if I let the car stall, then it won't start at all, almost like it's got too much gasoline. The last time in order to fix it, I unplugged the two wires to the fuel injectors, put the car into diagnostic mode, brought the screw back up on top of the intake so that it ran lean. I turned the key, and it burned up the fuel left inside. I plugged the fuel injector plugs back in and it fired up... all this leads me to think that the car is getting flooded...too much gasoline. I have the K8 ECU installed on the car, and I have the correct VAF on it (KL02 model #). I'd say it could be the ECU but I don't think it is, because if it's the ECU then why would the car run great except for when I turn it off for an hour or two and then try to start it. It's almost like gasoline is going into the engine while the car is turned off... I dunno, any suggestions? I'm getting pissed at my car by the minute.

Reaver19 · Post by **Reaver19** » October 20th, 2005, 1:31 pm

Ok so I just removed all the spark plugs and it appears as though the engine is flooded like I presumed, the plugs are soaked in gasoline. This explains why the car won't start even though I sort of already figured that out, but what I can't get is this: If it's the ECU causing the problem, which it might be, then why does the car idle perfectly fine, accelerate, everything fine, sound fine, start fine run fine and then when I park the car for an hour or two and go to start it, it's flooded...? The car works fine, and then when the car sits for an hour or two I go to start it, and it starts but it's bogged down big time, like it's getting way too much gasoline.

Reaver19 · Post by **Reaver19** » October 20th, 2005, 3:47 pm

hmm, I was just thinking, there is a sensor that tells the fuel injectors how much fuel to shoot in based on the temperature of the coolant, correct? If that is correct, maybe the sensor(s) are shot or just need to be swapped from my old K8 engine so that it stops putting too much fuel in while the car is sitting(turned off) or right before I start it(ignition turned but not all the way). Maybe I should just bite the bullet and get the right ECU for the engine, though I don't know for sure if that will fix it either, because I don't think the ECU is the component to tell the computer to throw fuel in while the car is off with no ignition turned...now if the car was throwing too much fuel in while it was running then I would think it's the ECU...Anybody...? Would be greatly appreciated...

hgallegos915 · Post by **hgallegos915** » October 20th, 2005, 6:26 pm

fuel pressure regulator..this was happening to me..actual gasoline was swuirting out of vylinder #6 (i guess i didnt have it tight enough) so yeah check that. Mine wont start when i install the old fpr and with the new one it starts.

mazdababe · Post by **mazdababe** » October 20th, 2005, 6:37 pm

ok pepole.....comon sense here.......what tells the ecu to regulate fuel....O2 SENSOR!!!! wow...and yes a leaking injector pintle would do the same thing excess fuel in cylinder.....no ofence guys...u wouldnt do your own brain surgery would u....dont be a cheepo...go to a profesional...

Reaver19 · Post by **Reaver19** » October 20th, 2005, 8:50 pm

Well, I took one of the fuel injectors off of the old K8 Engine and swapped that in with the top fuel injector. Obviously didn't start but that's because the car is flooded and I need to let it drain, anyways I don't think it's the fix, but I did it anyways. I also swapped the sensor that determines the temp of the coolant, and with that information determines how much gas to give the car. The question is now...is it the fuel pressure regulator or is it the O2 sensor... I'll figure it out as soon as I can, gotta let the fuel drain. Thanks for the contributions. Oh and mazdababe, I'm a college student, I don't have the $ to take it to a professional, but my uncle is a professional mechanic and he does help out a bit here and there whenever he can come over

Reaver19 · Post by **Reaver19** » October 20th, 2005, 10:50 pm

Keep in mind, I had the car running with everything that is currently in the car, minus the fuel injectors, which I just took off the old engine, in hopes that maybe it was causing fuel to leak in. Anyways, remember this, with everything I had in the car, it was running great, idling great (after a bit of playing with), everything, so if you think it's an O2 sensor gone bad or adjusting wrong, ask yourself this question: Is it possible for the car to be running near perfect with a bad O2 sensor but cause problems when the car is turned off for 2+ hours ? I'm 98% sure that the car is getting too much fuel, and I'm also pretty sure that it's not that it's getting too much fuel when it's running, it's when the car is sitting there for extensive periods...help me out here guys

Edit: sorry for all of the additional posts, should have edit'ed the earlier ones and just made a big one anyways, I was just wondering if you think it's possibly that the fuse for the fuel injectors needs to be replaced, like I said in an earlier thread, I replaced the top fuel injector, but I know that can't be the full fix for the problem because there was excess fuel in all 6 cylinders, and the top fuel injector runs fuel to the top 3 cylinders...I think, so if I had excess fuel in all 6 then both of the fuel injectors would either have to be bad, or the fuse to them would have to be broken, can't have just one of the fuel injectors not work and have all 6 cylinders flooded, can you?

Reaver19 · Post by **Reaver19** » October 21st, 2005, 11:46 am

Bump Bump! Are the answers to my questions somewhere on here I just need to search for them or what, I could really use some help here on these questions. Any help is greatly appreciated

lakersfan1 · Post by **lakersfan1** » October 21st, 2005, 3:50 pm

My car was doing this for a little while. Did you try flooring the gas when you crank it? This was the only way mine would start when already warm or recently started for a little while. Try it when it's doing it. See if it works. Get back to us.

Reaver19 · Post by **Reaver19** » October 21st, 2005, 4:00 pm

As of right now the car will not start whether my foot is completely off the pedal or whether it's floored, or anywhere in between for that matter. Though I do have to say that when I let the fuel drain, and blow it out with an air gun, and actually had the car running before, I did have to rev the car once I got it started to burn the excess fuel off. Once the excess fuel wasn't killing the engine, it idle'd perfectly and ran excellent, I only encountered the problem once the car sat for 2 hours after that but when the car was running before, it was excellent.

vozaday2000 · Post by **vozaday2000** » October 21st, 2005, 4:30 pm

i would check the injector fuse in the engine bay first. ok so you have the k8 injectors on, correct? that will cause you car to run very lean. but a test you could try is remove the injectors from the car while still hooked up. then try and angle them towards the ground, as to not hit your car, and turn the car over, watch the injectors to see if they are working fine. then shut off your car and watch it for a while and see if fuel constantly leaks for more than a couple of minutes. i dont know if this will work but i got the idea from the online manual page F2-117 to 118. but i assume you don't have the SST needed.

Reaver19 · Post by **Reaver19** » October 21st, 2005, 5:00 pm

Right, I don't have the SST. I will try your idea. Isn't there also a possibility that the fuse for the injector is shot and it doesn't turn them off correctly and it's not a phsyical hardware problem with the injectors themselves? If injectors are functioning properly (which I will check for) then the only other thing I can think of is the O2 sensor like mazdababe had said.

vozaday2000 · Post by **vozaday2000** » October 21st, 2005, 5:27 pm

o2 sensors do not make that much of a difference. i ran for 3 years with a o2 sensors wires ripped to shreds (snowbank). there is a fuse box in the engine bay by the battery. the fuel injector fuse is inside, take the fuse out and look to see if the wire inside the fuse is connected or if it is broken apart.

Reaver19 · Post by **Reaver19** » October 21st, 2005, 6:13 pm

I located the fuses, pulled the fuel injector fuse out and everything looked perfectly fine with it, plugged it back in. Anything else I can do? If you managed to run that long with a bad o2 sensor then I'm going to stray away from that fix, got anything else I can try? Thanks for the help btw.

vozaday2000 · Post by **vozaday2000** » October 21st, 2005, 6:48 pm

well for now just try the injector thing. look through the online manual and see if there is something there. i understand that you can't take it to a perfesional, and personally i doubt i will ever again after my last $500 bill, and i am a student also so i know exactly how you feel, i am having problems with my car too and can't figure it out. if the injectors pass with this test then you know that they aren't the problem. it is basically simulating what happens in the cylinder but outside so you can watch it. but other than that i am fresh out of ideas