Ok Here we go - a little background. Just installed a new 5.7 a week ago and everything ran perfect. Today I decided to take out the original memcal and chip, to reinstall my home brew performance chip (using moates switchable memcal and 4mb chip) burned a couple chips and tested them - all was good. Everything was running perfect and I decided to do a little cleaning in the engine bay and wash the K&N filter, let it dry reinstalled.

I go to start the car and I hear a large arcing from the engine bay (but engine doesn't fire), the coil was arcing into the metal frame aournd the MSD coil. I pulled the distributor cap and cleaned all contacts and rotor, plug wire contacts on top. Cleaned and inspetected the new MSD Blaster coil and look good (no cracks).

Tried to crank it again, first thing I noticed after 5 seconds of cranking was unbelievable bad gas smell. Sniffed around and visually inspected for fuel leaks, nothing visable - seemed that I could smell it worst from the intake tube in front of the MAF (took off just to check for smell) made my eyes water.

Cranked the car again for further inspection and noticed that the coil arced into itself everytime it past #1 cylinder, when the rotor past all other contacts, the arc would come off the spark plug boot into the block (NEW performance wires). I pulled #1 plug wire and grounded it against the header to verify spark from the plug itself. The plug arced like it should and caught the engine on fire. The fumes coming out of the PCV valve on valve cover (which was open) were so bad it caught it on fire. Fortunately, I was able to immediately put it out.

So, now I have bad bad gas smell, arching from coil and plug wires. The engine now can barely crank (battery is good and strong). With the ignition in the on position fuel rail pressure is now showing 0lbs.

BTW, put the original memcal and chip back in with no change. Everything was running perfect up until a couple hours ago. Just went to start it and the above problems started. Checked all my grounds - looked good.

ANY IDEAS?????

 

Let me add that there are no engine codes showing at this time.

 

Tried a new coil, no improvement. Even the new MSD Blaster coil it immediately arced into the metal frame that the coil sits in. I placed the coil in a rubber boot so it was not grounded and the damn thing arced from the tower into the metal coil frame.

Way confused on this one

 

UPDATE!

Pulled each spark plug this morning. #1,#3,#5,#7 all were wet, on the even side I've only taken out two before writing this, #8 and #6. #8 was wet, I pulled #6 from under the car and no less then a pint of gasoline flowed out all over me. Still going to pull #2 and #4. Can I assume for some reason my #6 injector is stuck open or leaking?

Sure wish someone had some input no this.

 

One last thing, could the cylinder filling up with fuel to the point of not being able to turn over then engine have caused any damage? This engine is a week old.

 

Could the Chip be causing the Injectors to remain open?
This is a really tough one.

 

I'm thinking the same thing. Everything was good until I tried the new chips. Thinking the cylinders were already filling with fuel when I changed back to the stock chip. Sure hoping I haven't damaged the new engine.

 

That would not be good!!!!!!!!!!

The Trickster!!!!!!!!!!!!!

 

oh man i wish i was there!disconnect #6 injector (power supply)see if it does any better i am thinking that it is coincidence your injectors are going bad,i have also seen cars have spark at the plug but the ignition module was bad(spark was week)..

 

Ok - checked the ohms for the injectors. Kind of interesting but don't know what to do with the information.

Cylinder
1 = 14
2 = 21
3 = 14
4 = 21
5 = 14
6 = 21
7 = 14
8 = 23

why would the entire right bank be out of spec. to much of a coincidence (isn't it). Could it be a wiring problem? Do those numbers point to anything in particular? Besides four injectors are bad?

Gen3z, your input is appreciated. Was scared to just take off the #6 and try starting, incase the same thing did happen to #6 or any of the cylinders. I did, crank the engine for a quick second when all the plugs were out and of course the engine turned fine. Was trying to be careful not to turn the engine over since the fuel was probably removing any lubercation on the cylinder walls.

 

After spending about in hour researching this problem, I went back out and checked the ohms again. I had left them all disconnected and didn't touch anything during that time. ALL injectors now say between 13 and 14. What gives? Did they need to reset themselves after being disconnected?

 

I'm not sure anyone is going to read all this but, here's another update.

With all spark plugs out, and all injectors diconnected from the wiring harness (coil disconnected) I cranked the engine over several times, fuel spilled from many or all the spark plug holes. Fuel pressure got to a maximum of 25lbs and then drifted back to zero (fairly slow drop - over about 5 minutes). Triple checked the ohms on all injectors - all are 13 to 14. No fuel coming from vaccuum line on regulator (which is new) and pinched return line with no effect on fuel pressure changes. It appears that everything disconnected, the injectors are still allowing fuel to spill into the cylinders.

PLEASE HELP - EVERYTHING WAS PERFECT YESTERDAY MORNING.

 

I took a gamble and removed the plenum and fuel rail thinking mabye my injectors were binding and they were stuck open.

Cranked the engine with injectors unplugged and spark plugs out, no fuel leaked from the injectors. Fuel pressure isn't getting above 25lbs, pinched off return fuel line, didn't make a difference on fuel pressure or leak down. Gas is still pumping out of a couple cylinders throught the plug holes. It must have filled most of the cylinders to the top with gas.

Even though nobody except fredzep and gen3z has responded to this thread, it is a good data log tracking my steps and hopefully will help someone in the future.

 

Fuel is dumping out the sparkplug holes because there aren't any sparkplugs installed to ignite the mixture. So it all just pools up and spills out. I think your injector coils are right where they are supposed to be, but that's not the only thing that can go bad. They could be sticking open also like the other guy said. Are you sure that all the spark plug boots were seated right on the cap and plugs?

Good luck finding your problem

 

Thanks, but none of the injectors are plugged in, couldn't be because the plugs aren't firing. They still have residual from before I disconnected the injectors (as I wrote, the fuel rail and injectors have been pulled up out of the intake). Yes, all the plug caps are seated.

 

check your ENGINE GROUNDS. because your coil shouldn't be arching.

also pull out the plugs, clean them all, then re-install them WITHOUT plug wires, then pull all your injectors OUT. now crank the motor over about 20-30 times. that should remove all the fuel from the cylinders. then reinstall the injectors, and the wiring, double check your plug wires are hooked up right, check your engine grounds again. install the orginal chip, and try to start it.

 

Well, I'm assuming that all my brand new Bosch Platinum 4 plugs are fuel fouled. I will pick up a new set tomorrow. As far as the grounds go, early in the the thread I described that I've checked all of them (maybe a cracked wire), I will recheck that as well. I've let the car sit all day with plugs out, in an effort to dry the cylinders. Every time I cranked the engine during the day it continued to throw a little more fuel out of the spark plug holes (even though the injectors were disconnected and not any longer seated in the intake manifold). The original chip was reinstalled fairly early into the process.

I'm very curious why with ignition on (prime position) the fuel pressure barely makes it to 20lbs. It seems like there has been a ripple effect off the original problem of the distributor arcing.

I appreciate your input and will focus on possible cracked ground wires.

 

First question does your fuel pump run?? It shouldn't stop untill it builds up enuff pressure. I would drain your oil if you have that much gas in the cylinders there has to be alot of it in your crankcase which will burn up your bearings. Also are you getting spark on all 8 cylinders?? I an not familiar with the msd setup but that could definitely be a problem also.

 

well from what I have read in my numerous books, your injectors should have al LEAST 16 ohms of resistance. It also sounds like your fuel pump might not be shutting off when it reaaches the correct pressure like it should

 

Yo.. remember the ground wire that was about to break when we tried to nig rig that bolt which went into the engine block? look to see if the wire finally broke or since it was exposed wire see if it is touching any part of the ignition. also could it be possible to be 180 off regarding top-dead-center at on the #1 cylinder?? maybe a tooth off at ignition coil.. we always had a problem with that..

:hail: your son

 

Actually, for my 24lb injectors my current ohm readings are just about perfect. Injector ohm readings vary from one type and size to another. But thanks for you input.

Fuel pump is definately shutting off, watching with my Scanner (voltage on/Voltage off). I will dig a little deeper for a missing or broken ground wire - seems to be the consensus for now. The distributor and timing are perfect as well.

Spark isn't week, the huge arcs coming off the spark plug boots seem to support that. My guess at this time is the spark plugs are fuel fouled and the spark has no where to go, thus the arcing into the block.

Will check and get back to you shortly.

 

OMG!!!!!

Just went to change the oil and had at least a half a gallon of gasonline in the crankcase. Fortunately, I have not run the car since this problem occurred.

Now, I'm assuming I need to prime the engine with oil to flush the gasonline out. What could have held the injectors open that long, to pump that much gas into the engine? I checked the ohms (all is good), checked the valves on all the injectors (all are closed) before reinstalling. Also, checked the injectors connected to the fuel rail and ECM connectors (no leaks). Could a bad bin have done this (I did have a problem with one of the prom burns (was written to the wrong address)?

Thanks!