"overboosting or rev-limiter?"

[crazymadbastard]

Well the overboost made you run too much air and you detonated. I had a blast at some high boost, and pushed it too much. Did not even bother to do a compression test. This is what I found when I pulled the head:



It took me 45 minutes to pull the head- But this is my 3rd time. I figure another 4 hours and I should have it running again. I will drop the pan, remove the balance shaft remove the rod nuts and pull the piston connecting rod assembly through the top and replace the piston and replace all the rings and rod bearings while I am at it.

[turbo-tease]

Quote:

Originally Posted by crazymadbastard Well the overboost made you run too much air and you detonated. I had a blast at some high boost, and pushed it too much. Did not even bother to do a compression test. This is what I found when I pulled the head: It took me 45 minutes to pull the head- But this is my 3rd time. I figure another 4 hours and I should have it running again. I will drop the pan, remove the balance shaft remove the rod nuts and pull the piston connecting rod assembly through the top and replace the piston and replace all the rings and rod bearings while I am at it.

wow! that I didn't need to see that is real scary! that is going to make things alot harder! like I said this is my daily driver & now I am down a car now, I had to take my wifes suv! I don't have alot of time or money to fix a problem like this!(damn!) can that happen just doing it once? Isn't that why there is a overboost monitor? why does'nt it stop it? it felt like it had a rev limiter!

[Ender]

plug the vac line to the wastegate back in and secure it with a small wiretie.

[crazymadbastard]

Quote:

Originally Posted by turbo-tease wow! that I didn't need to see that is real scary! that is going to make things alot harder! like I said this is my daily driver & now I am down a car now, I had to take my wifes suv! I don't have alot of time or money to fix a problem like this!(damn!) can that happen just doing it once? Isn't that why there is a overboost monitor? why does'nt it stop it? it felt like it had a rev limiter!

This is what happens when you run any car when it is not running right. Me included.

Don't sweat it too much. untill you do your compression test.
Cindy sells pistons for like $35, probably just need one. If you want to halfass it you could be on the road for like $100 and about 6-8 hours. There is a guy selling gasket sets for $20 but you still need the hg- $20 from dealer. I hope it's not too cold where you are.

[turbo-tease]

Quote:

Originally Posted by Ender plug the vac line to the wastegate back in and secure it with a small wiretie.

all my vac.lines are still attached. ?

[turbo-tease]

Quote:

Originally Posted by crazymadbastard This is what happens when you run any car when it is not running right. Me included. Don't sweat it too much. untill you do your compression test. Cindy sells pistons for like $35, probably just need one. If you want to halfass it you could be on the road for like $100 and about 6-8 hours. There is a guy selling gasket sets for $20 but you still need the hg- $20 from dealer. I hope it's not too cold where you are.

see the thing is that the car was running just fine just a few hours before.
I've been threw alot with this car more things than I can describe at this moment my wife is the second owner of this car & bought from the dealership at just 5 years young,it was a new car trade that still had warranty on it.
I wouldn't think of getting rid of it it's in too good of shape & we have had it too long! it's like one of the family!lol! it just drives me nuts from time to time.
I am a auto technician too but this is not my strongest area! it is cold here right now also(Brrrrrrrrr!) but I have a garage but no heater no chance that this might be from bad gas?

[crazymadbastard]

bad gas only affecting one cylinder?
Get a kerosene heater. My garage is attached and it still gets to 45 degrees when it's cold outside. I installed electric heat, can get it to 65-70 when its mid 20s out.

[turbo-tease]

was figuring that maybe something is clogging the injector or is affecting it! it just seems odd that it runs fine before gas station then not after. I went to see my dad who was a chrysler corp. tech for 30years & he heard me pinging when I was pulling up to him at his house. Then when I left to go home I got half way home when I noticed when I would accerate to climb a hill I got a slight knock.

[crazymadbastard]

Quote:

Originally Posted by turbo-tease was figuring that maybe something is clogging the injector or is affecting it! it just seems odd that it runs fine before gas station then not after. I went to see my dad who was a chrysler corp. tech for 30years & he heard me pinging when I was pulling up to him at his house. Then when I left to go home I got half way home when I noticed when I would accerate to climb a hill I got a slight knock.

Pinging is what got me from what I hear, I had globs of molten piston hanging my valves open and a chuck got pushed against the spark plug.

[turbo-tease]

wow nice plugs! that is what doesn't make sense to me because my plugs don't look anything like that at all. My plugs have had normal wear.My motor does not have more then a few thousand miles on it, it is still almost new. I'm just so confused I spent so much money putting this car back together last just to be broken all over again(probably about $3,000)

What is the pinging caused from & how to stop it?

[crazymadbastard]

Pinging and knocking?

Too little fuel, bad gas,too little octrane, too much boost, engine running too hot, timing off, too much blowby (causing oil back into the combustion chamber,) bad plugs, a hot spot on the head or piston. I think that about covers it.

[turbo-tease]

ok, here goes I finally did my compression test yesterday & the results were not good!
#1 cylinder was 50psi,#2 cylinder was 50psi,#3 cylinder was110psi,#4 cylinder was 140psi.#1 cylinder I saw small drip of coolant while I was watching cylinder for leakage & other cylinders had small amounts of oil in them. I was hoping for a better turnout but what else is new! things have just not been going right for me.I hope next year is a better year!! now when is comes to putting a headgasket on what would be a good one to put on? & should I put copper spray on it? should I change the head bolts with so low of miles that are on the motor? thanks again. mike.

[85boostbox]

good person to go through for parts and she will never steer you wrong is Cindy. She is the owner of FWD performance and the web site is FWDPerformance.com give her a call the number is in her site. she will help you out

[turbo-tease]

what should I do?

[IROCNOROLL]

It is possible that you have loaded some bad fuel. You have had the car this long so you know it takes the best fuel you have available to resist knock under boost. Right?
Freeing up the exhaust is allowing the boost to hit faster. If you read back to one of my earlier posts I wrote about the orifice on the vac hose off the side of the turbo outlet. This little usually red connector looking piece will become plugged. When it does you have no computer control over the boost level. The hole inside this thing is like the size of a hair. They tend to plug up best when sitting on a bench during repair work. Either this orifice is plugged or the waste gate solenoid up at the pass. front of the car is stuck open. It is normally open. The 'puter cycles this solenoid from vent (open) to closed to build pressure to the waste gate can to blow the waste gate open and control max. boost.
A combination of poor fuel and uncontrolled boost provides the ping / detonation. This has probably pushed the head gasket between #1 and #2 holes. Also a little water in the fuel can affect #1 hole by sitting in the top of the injector and allowing the fuel to float over to the rest of the rail, and really have only the first injector feeding the water to the hole.
From what you have said, from your compression test, you will at least need to lift the head off and straight edge the head and the block. If there is no evidence of piston / cylinder damage, then clean her up, fresh head gasket, and NEW head bolts. The head bolt thing is because they are torque to yield, or stretch type fasteners, they are one time use. Many will chime in here with how they have reused their bolts over and over, but it is just another invitation to redo this job again to reuse the old bolts. Don't forget the washers, as many times the new bolts don't include the washers. Transfer them from the old bolts. Lube the threads and both sides of the washer with molylube if you have it or oil. Follow the torque instructions and stretch. Also check the alignment dowels at the two ends of the block to make sure they are not too tall off the block. We have seen several instances now where after a head gasket job with a resurface was done elsewhere, the new gasket leaks because the dowel height holds the head up and it will not clamp the gasket correctly.
I would probably pump the fuel out of the tank by jumping the asd relay and pulling the fuel supply hose from the rail into a gas can. You will be able to see if there is any water in there and makes room to get good fuel into the tank to run her on after the repairs.
Bite the bullet and tear her down, and lets hear what you find. Good luck.