3800 Boom.

[DarkShadow]

So..... it looks like i blew my engine tonight. yay me!

was getting on it to merge onto 290 and at about 5500rpm the car lurched and the engine it the rev limiter REAL fast and then no powa and engine stalls.

pulled over, cranks slow and hard and engine coughs and sputters at me when i crank it.

sigh.....

anyone got a l36 or l67 laying around?

Click to read more...

 

[Fish]

Were you the one I sold my atap to?? If so isnt this your second engine?? And if so to the previous 2, are you still running the intense PCM?

 

[DarkShadow]

yep 2nd engine, intense stage 1 pcm

 

[IDAFC21]

yikes...that sucks..

 

[syP]

should have learned from your first mistakes..

INTENSE PCM ftl

 

[DanJ]

Do you recommend the DHP over the Intense?

 

[Lord Tin Foilhat]

ive heard alot of bad about intense pcms on the cobalts too

 

[PANDA]

Time for a L67 swap... o wait

Good Luck Man.

 

[DarkShadow]

Im not pointing the finger at the intense PCM at all.

The first engine went from a bad fuel pump causing a super lean condition when i gunned it and hole in piston.

Im thinking the timing chain broke or something along those lines. cuz all the accessories turn when i crank the engine and it turns over slowly and feels like the valves are closed or something when cranking....

 

[DarkShadow]

Update:

Did some looking into it, looks like the timing chain jumped. engine is out of time and also i think i found what the mysterious tick was that has plagued this engine since day one..... found a damaged plug on the #4 cylinder and it looks like something was hitting it, maybe piston slap a little hmmmm....

 

[Mook]

ehhhh. sucks to hear man

 

[NetChemica]

Update:

Did some looking into it, looks like the timing chain jumped. engine is out of time and also i think i found what the mysterious tick was that has plagued this engine since day one..... found a damaged plug on the #4 cylinder and it looks like something was hitting it, maybe piston slap a little hmmmm....

Piston slap on a GM?! NO WAY!

 

[Yaj Yak]

Update:

Did some looking into it, looks like the timing chain jumped. engine is out of time and also i think i found what the mysterious tick was that has plagued this engine since day one..... found a damaged plug on the #4 cylinder and it looks like something was hitting it, maybe piston slap a little hmmmm....

orrrr maybe a chunk of your piston from that awesome intense pcm

 

[DanJ]

I still don't get the finger pointing at the PCM. What is so different with their bin file compared to the DHP or ZZP that makes it so much worse? If their is something wrong with it i'd like to get it out of my car ASAP.

 

[Mook]

ive been out of the 3800 loop for awhile, but didnt a few engines pop when intense first offered their pcm? something about it allowing tons more timing or some crap like that

 

[Fish]

Update:

Did some looking into it, looks like the timing chain jumped. engine is out of time and also i think i found what the mysterious tick was that has plagued this engine since day one..... found a damaged plug on the #4 cylinder and it looks like something was hitting it, maybe piston slap a little hmmmm....

Piston slap on a GM?! NO WAY!

There have been ZERO counts of 3800s slapping pistons in stock form. The tolorance is too tight. Forged slugs are a different matter since they will slap until engine temps get warm and the pistons expand. Dont make me drag James in here and beat you to death with knowledge. And keep your knife in your pocket vato. :lol:

I told you when we met up for the atap. Alot of earlier intense pcms were commanding too much timing. I forget the exact cause, but the basic and S1 PCMs were getting an upwards of 21* of timing at WOT.

 

[DanJ]

Yea that would do it. I get 14-14.5 WOT. Wouldn't KR be really high at 21* of timing at WOT? I assume these people didn't have a constant KR scanner or anything hooked up?

 

[Fish]

Im not too sure. KR is worse the smaller the pulley you go. IE, if you have a 3.0 pulley running 2* of knock, I want to say thats equal to a stock pulley running 10*.

 

[LeddZepp8687]

Update:

Did some looking into it, looks like the timing chain jumped. engine is out of time and also i think i found what the mysterious tick was that has plagued this engine since day one..... found a damaged plug on the #4 cylinder and it looks like something was hitting it, maybe piston slap a little hmmmm....

Piston slap on a GM?! NO WAY!

Despite alot of GM engines piston slapping the 3800s really arent know for this.