2.7 will not start.

Ok so I made the mistake of going into too deep of water I could have possibly sucked water into my intake
I never stalks while in the water but as soon as I got out the engine was misfiring. I limped it to my buddys house (1 mile) shut her off and the cat was glowing red. Let everything cool down and when i went to start it is had a normal idle but when I accelerated it would misfire and barely driveable but I managed to limp it home and here she sits. The cat wasn't glowing when I got home. I changed the wires and plugs, distributer cap. It won't start back up. So don't know if I fucked the motor but If anybody can think of anything that would be appreciated

 

UPDATE: well went out to smoke a cigerette and tried turning it over. Started right up but I put it in 1st and reverse and will not move. It has been sitting for a couple weeks. And the exhaust sounds unpartically loud from under the driver side

 

I'm no expert, but I would disconnect the exhaust at the front end of the cat (behind the upstream o2 sensor) and the see how it does. Maybe you just have standing water trapped somewhere in the exhaust instead of water in the intake.

 

I was saying that when I popped my hood after being in all that water there was water present on my air filter. I will try that and see what happens it's just bugging me that it is running now but something with the trans I'm assuming is not even allowing me to move forward to backwards... even in neutral. But it will stall if I would pop the clutch

 

A little water on the air filter doesn't mean you got water all the way in the intake.

Is it a 5 speed? If you went deep enough, you should drain and fill your tranny, and your diffs, and your t-case. If you got water in the vents you don't want to drive it like that.

 

Yep a 5 spd. I haven't been driving it for week's last time I drove that was when I screwed things up. What vents would you be talking about?

 

I love no start/hard start issues, it gives us a chance to put our diagnostic hat on.

First off there is no reason to remove the exhaust, it wont prove anything

The differential breather mod is pretty well known, and exactly for the situation you drove your truck into. Your transmission, whether manual or auto have similar breathers, so it is possible there is water fouling in the transmission. This would cause the issues you are experiencing in a auto tranny, only if there was a lot of water mixed with the fluid. Being that you have a manual, i dont think its the issue (though you still may want to change the fluid).

The catalytic glowing red hot is a indicator, this should never happen under normal circumstances. Lack of power in gear at idle... Im thinking a exhaust obstruction, such as fouled cat. Also could be a manifold vacuum leak.

I would do some vacuum tests, first with basic manifold vacuum. do a test for back pressure in the exhaust. This can be done with a vacuum gauge at the manifold, though this is measuring the resistance to the combustion vacuum, not direct back pressure. It will usually show a rise in manifold vacuum then occasional drops.

There really isnt a simple way to do it properly in these trucks. Either unbolt the EGR valve and find a hose that will seal in the the exhaust tube so you can connect a vacuum gauge. Or if you have welding skills, just drill a hole in the exhaust pre catalytic to get a reading (then weld shut or weld in a new o2 bung that you can access later). At idle should be 2-3psi. With throttle can be up to 8-10 psi.

It is also possible that the cold water hitting a hot exhaust caused a cracking of the piping or catalytic itself, resulting in the noise youre hearing. A back pressure and vacuum test will help determine this.

Second thing to check would be o2 sensor function. Have you done the usual OBD scanner check?

 

Dunno if its possible in your situation, but at least a couple times I have driven through irrigation ditches(live on a cattle ranch) then parked the truck for a couple weeks at a time and my brakes had rusted so bad it locked the wheels up! Its taken quite a bit of persuasion to bust em free too. Something to consider...

 

This is why I suggested disconnecting the exhaust in front of the Cat but behind the upstream o2 sensor. If there is any sort of restriction in the cat or muffler, this will bypass that issue. There's no need to remove the exhaust - just let it hang there disconnected. See if the truck runs better (it will be loud).

The vents I was referring to are pressure vents - the easiest one to find is on top of the rear diff on the left side. There are others on the other diff, and on the tranny/t-case. These can let water inside if you go deep enough. I would change all of the fluids just to be safe after a submersion.

 

Ok,my truck did something real similar to this.....check the ground that comes from the fire wall to the block...I changed everything trying to fix it.would idle fine but would not run under load.the reaer brakes are most likely stuck as well.

 

Your all gems. Thank you it is curently raining like crazy so I'm not going out there lol but the first thing I'm gonna do is get the truck to be able to roll in neutral first so if I would attack the drum brakes with brake parts cleaner and hook a chain to the hitch and pull it to try and loosen it up would that be a little to agressive?

 

Not for me.lol....just check to make sure there is nothing lodged in the e-brake ....after you clean everything it should free up.

 

Lol Yeah well I just went and dumped the clutch twice and it broke feel. took it up the street it ran ok was able to get to any rpm with out any lag... still pretty loud from under the truck... but I'm gonna put it in the garage and gather the fluids to change the diffs, etc. And prolly work on taking the cat off because I think it's boned after it already got glowing hot the other weekend. There is definite leaks from the cat back somewhere but she runs!!!!

 

I understand where youre going, but by unbolting the cat, youre adding an additional variable to the problem. You would be completely throwing off the feedback from both o2 sensors, and of course removing what should be minimal back pressure that the ECU has tuned itself for. So whatever result you get would not be an accurate representation of the engine running.

 

Muddy water in the clutch could screw some things up with the bearing movement and friction surfaces. Might of done something to the slave cylinder. Its hard to say. If the water was up into your intake, then you basically dunked all these moving parts in an environment that they are not designed to be in. I think you need to do some pressure and vacuum tests first.

Sigh...I vaguely remember rain.

 

My truck is a 1997.....it has been up to the hood fro brief periods in water......little water in the intake but it didn't hurt anything else.....snorkel to come very soon.lol...def change all the fluids asap

 

And I have no cat on my truck..zero problems...not even a cel..... And yes it works...comes on with the key and goes right back off

 

Surly there's an o2 simulator on your truck to trick the CEL...

 

OP has already posted that he's up and running again albeit with a likely exhaust problem.


Sounds like he now has redneck 'custom' exhaust you usually need either a drill or a hammer and nail to accomplish


But you really should drain all your fluids. Water is the devil. I pulled some into the rear diff of my tow rig years ago, pulling a boat out. We made it about 1/2 way home when the diff welded itself together at 60mph. 2 in the morning, crawled under the truck to see what was going on. The diff was glowing bright enough to read by. Learned one hell of a lesson that night. When I finally got it home and pulled the cover, just teeth and shrapnel along with a gallon of water. I ended up just buying an entire axle from a junkyard and swapping it over. We put in new seals and venting before it went back in the lake!

 

You have a 96 which I think is a distributor? Could be water in there. The newer 2.7's have coil packs which are much more waterproof. I'd check that since its easy. Maybe your cat is unrelated