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PLEASE HELP! FAST! Caution: kind of a long post

jboyes

jboyes

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SE KS
Hey guys, I don't post too much on here mostly just read and learn but I have a big problem. Most of the time I can figure out the problem and if not then I have my brother do it (he's ASE certified) and he fixes it. The problem with him working on it now is his girlfriend is about to have a baby any day now and he doesn't have time to help me.

Engine: 454 TBI .060 over, headers, Electric fans, 2-10 inch and 1-15 inch all on same relay and all on as long as the key is on.

Replaced: Some plug wires that were either bad or the boots were crispy from the headers.

Fuel Pump

Fuel Filter

Here's the story:

We were out wheeling one weekend and everything was working great. Next weekend we were headed out to play and it was running great.....until.....we ran out of gas on the way to our destination. Our buddies brought us a couple of gallons of gas and we started it up and drove to the gas station, still ran great.

Get to the gas station and fill up. Start the Blazer and try to pull out of the parking lot and it won't hardly pull itself. Finally get it going good enough to get to our destination. When there we check the plug wires, one is toasted so we replace it and check the others. All the others are fine except for a couple with the boots melted a little. Still running like SH!T. Load it on buddies trailer and take it home.

Few days later go out and start it up and it runs perfect! Until it gets a little warm and then starts to run like crap again. This is when I replace the fuel filter. Don't know why just seemed like the thing to do at the time.

By running like crap I mean that it will start up and run ok for a while at idle but then starts spitting and sputtering and almost dies and then when you think it will die it revs up and runs ok for another 5-10 seconds and then does it again. This keeps repeating until you shut it off and let it cool completely down, then it runs good til it gets warm, maybe 120-140 degrees or so. When trying to drive it down the road it will almost die when you start going but as you build a little speed it will hold it until you floor it or give it more gas then it acts like it wants to die and the sputtering starts again.

So the fuel pump sounds kind of weak so I replaced it thinking maybe it wasn't pumping enough gas. New pump sounds much stronger than the old one but still doesn't fix the problem. So I moved on to replacing the plug wires with the melted boots. Still no go.

Guys I am not a mechanic and don't claim to be one. At the very most I a parts changer. So please any ideas you may have would be a great help. We are supposed to get some snow tomorrow and I would like to go out and play but as it is, it won't happen.

Could it possibly be bad gas? Water in the gas? That is what I am thinking now since that is when it started. If so should I get some heet and add to it and top off the tank with fresh gas.

Thanks in advance guys.

Jason
 
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Coil maybe??? could work when cold but when it heats up it pukes. Sounds like somthingin the ignition system to me. But Im no expert but Im sure someone on here will have an idea.
 
i would try some sort of water remover/ fuel sys. cleaner(i think some system cleners are water remover also)...u've done so much,so whats pouring a little bottle gonna hurt.
i don't think i would top it off tho...mayb pickup screen clogged and have 2 drop the tank!
 
Snowman - thanks for the idea. I called my brother to see how I could tell if the coil was bad and he told me how so I tried it and that is what it is looking like now, we are going to replace it in the morning.

blazin - thanks for the reply. I think I will add a couple of bottles of sea foam to the tank tomorrow when we replace the coil. just in case. can't hurt anything.

Thanks guys,

Jason
 
If it is smoking alot while its running, the temp sensor puked for the computer and the computer is choking the engine all the time and loading up the cylinders with fuel. You could try and run it till it runs bad and find an easy spark plug to pull out and see if it is wet with fuel. I know heat and headers make this hard to do. It could be the ign. like the above post too. Hard to say with out seeing it in person. Heat does make the ign. act up when they are starting to go. Do you have an O2 sensor and CAT? Did you get junk past the fuel filter and the injector nozzle clogged or stuck open? Lots of questions without seeing it.
 
Dumb question, there is coolant in the engine. The temp gauge doesnt work with out coolant. Overheating engine will misfire and run like a turd.
 
.......mmmm.......ok

JPMSK5 said:
Dumb question, there is coolant in the engine. The temp gauge doesnt work with out coolant. Overheating engine will misfire and run like a turd.
Click to expand...


ur a figgin genuis...1st off didn't ur 2nd grade teacher teach u that the only dumb ? is the ? u don't ask....taking u r serious when u ask and u onestly dk!

2ndly....the temp gauge must be working if he knos its around 120-140* when it turns to sputtering

3rd a overheating engine doesn't always run like a turd...i had a 455 ponti in a demo car run a 400* temp gauge pegged, and it was screaming....it ran better than ever....granted i couldn't turn it off, so much ether in gas and glowing exhaust valves=run w/o plug wires.... it would sit there and sorta diesel and lope 4ever had to stuff rags in carb to stop air to shut it down

how do u get the magical conclusion of water in engine
 
blazin_blazer said:
ur a figgin genuis...1st off didn't ur 2nd grade teacher teach u that the only dumb ? is the ? u don't ask....taking u r serious when u ask and u onestly dk!

2ndly....the temp gauge must be working if he knos its around 120-140* when it turns to sputtering

3rd a overheating engine doesn't always run like a turd...i had a 455 ponti in a demo car run a 400* temp gauge pegged, and it was screaming....it ran better than ever....granted i couldn't turn it off, so much ether in gas and glowing exhaust valves=run w/o plug wires.... it would sit there and sorta diesel and lope 4ever had to stuff rags in carb to stop air to shut it down

how do u get the magical conclusion of water in engine
Click to expand...

My thoughts exactly, thanks.

I am just going to replace the coil in the morning and go from there. That is looking most likely like the culprit.

Thanks,

Jason
 
Ok I know, I only do this for a living and own my own Company. Last week we had a customer that had a misfire problem temp gauge said 120 temp gun showed 340, pulled the thermostat and no water in the engine. Today I started a generator by adding coolant to the radiator so the computer would let the engine run, yesterday added oil to a power trowel to make it run so the low oil sensor closed. I dont know why I would ask something like that, when I see overlooked stuff like that every week. ???????? Humm
 
does ur temp gauge keep rising above the 120-140 range and reach the 180-200 operating temp? then mysteriously seem to hover there?
 
blazin_blazer said:
ur a figgin genuis...1st off didn't ur 2nd grade teacher teach u that the only dumb ? is the ? u don't ask....taking u r serious when u ask and u onestly dk!

2ndly....the temp gauge must be working if he knos its around 120-140* when it turns to sputtering

3rd a overheating engine doesn't always run like a turd...i had a 455 ponti in a demo car run a 400* temp gauge pegged, and it was screaming....it ran better than ever....granted i couldn't turn it off, so much ether in gas and glowing exhaust valves=run w/o plug wires.... it would sit there and sorta diesel and lope 4ever had to stuff rags in carb to stop air to shut it down

how do u get the magical conclusion of water in engine
Click to expand...

You need to calm down a bit dude...nobody here gets a cookie if their interweb diagnosis is right. It was not an idiotic thing to suggest.

Rene
 
Nobody else suggested low coolant, so he was not saying to anyone else that it was a "dumb question".

He should probably have phrased it a bit differently...but I read it this way:

Dumb question...is it low on coolant?
Click to expand...

If you had suggested it was low on coolant I could see you getting a bit hot. Soooo...calm down a bit OK?

Rene
 
i'm calm.....now u r right.....context means alot.....the way u put didn't seem offensive at all , i read it as saying the original post was dumb....and the definitive answer was water in the engine...sorry if i read wrong
 
Just trying to help, but when you overlook the easy stuff, you feel like a dumb rear, when you find the problem. I wont give anymore free advise, I will stick to paying customers.
 
no, don't do that....i read out of context and it sounded offensive...even original poster thought so....so i was defensive and smart alleck and i'm sorry.....please dispense the knowledge...and it all will come out in the wash.....if not give it a buff job :-)
 
JPMSK5 said:
Just trying to help, but when you overlook the easy stuff, you feel like a dumb rear, when you find the problem. I wont give anymore free advise, I will stick to paying customers.
Click to expand...

Text is a tough medium, and misunderstandings are very common. Don't get discouraged, your input here is valued...

Rene
 
I sure thought he meant I asked a dumb question.

Sorry I took it wrong. I have checked the coolant and it is full. If I let it run long enough to warm up then the temp gauge stays around 210.

I was told to turn the lights off in the shop and start the engine and to watch for sparking on the outside of the coil. There was no sparking when it was running good but as soon as it would start acting like it was going to die, it started sparking. When it would start running good again then the sparks would stop.

Thanks,

Jason
 
All right :rolleyes:one more thing, water bottle mister, Wally World(wal-mart) mist spray your wires and coil with water and see if it misfires. If it does find the problem and repair. We use Taylor wires and never had a problem.
I run 6A MSD, and we have put them on 8 too and never had problems on racing mud trucks but not advise it, static will still get you with them on an 8 MSD.
 
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