Troubleshooters Step Right In, workin on it now, any help appreciated.

[Kbrown]

Ok, so a while back i posted about my car having a misfire type symptom. Nothing has changed from that post. Any suggestions would be greatly appreciated.

The problem:

Misfire type symptom... occurred when on my way home from green bay wisconsin. Got as far as milwaukee and all of a sudden the car fell flat on its face. Hasnt run right since then....

What i have done to try to fix:

- Changed injectors, upgraded in the process (42.5's to 65's)
- New wires (needed to be done anyway...)
- checked all plugs, no sign of "smashing" and all looked normal
- tested icm through autozone, passed
- checked ohm readings on coil packs, all within spec....
- i have tried the whole, pull the injector clip off to see which cylinder im having problems with, but i really cant tell which is the issue...

NOW, what else can i check, i have no idea where else to go...

Anyone that may be remotely in the area and would be willing to come out to Huntley to help me out, i can make it worth your time if we get it running. Also, im on AIM now (SN: grandprix22187) any help appreciated....


Performance MODS for reference:

Gen V Blower
Gen V Stg 2 I/C
Gen V LIM
XP Cam
TEP Trans
3k Torque Converter
Stock Rockers
105# Springs
65# Injectors
N* TB
ZZP Fuel Pump Rewire
4" CAI
180 T-Stat
Pacesetter Headers
Borla Catback
ZZP Fuel Rails (Junk)

Click to read more...

 

[02BlueGT]

Have you checked Fuel pressure(Idle, Load)? also do you still have Evap and/or EGR?

 

[ldyzluvdis06]

what plugs and what gap?

 

[Kbrown]

havent checked fuel pressure yet... what should it be @? ill go rent the tester @ AZ tomorrow....

plugs are AL103s .. couldnt tell u the gap off the top of my head as my buddy gapped them when i was up in green bay :rollpicard:

 

[ldyzluvdis06]

havent checked fuel pressure yet... what should it be @? ill go rent the tester @ AZ tomorrow....

plugs are AL103s .. couldnt tell u the gap off the top of my head as my buddy gapped them when i was up in green bay :rollpicard:

im pretty sure the FP should be like 45 or some where close to that. id go ahead and pull the plugs and check the gap on them also

 

[TommyGloves]

Stock fuel pressure is 50psi with the vac line disconnected from the regulator.

 

[bikrboy128]

have you fixed the vac leaks at the fuel rails yet?

 

[Kbrown]

seems that way, the new injectors helped out a bit, i still think im going to pick up a set of fuel logs to help futher though.... i dont hear the ssssssssssshhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh anymore though after i shut it down...

 

[frosty23_45]

do you have a scanner?

 

[Kbrown]

so problem ended up being the "attack of the 105# springs"....

had a broken spring on cylinder 3. anyway, cars up and running so expect to see me at lukes this Thursday. thanks again for the suggestions.

 

[Eagle]

Congrats on finding the issue!

 

[bikrboy128]

atleast the valve didnt drop.

 

[TommyGloves]

so problem ended up being the "attack of the 105# springs"....

had a broken spring on cylinder 3. anyway, cars up and running so expect to see me at lukes this Thursday. thanks again for the suggestions.

Do you have any pics of the spring? Glad to hear you found the problem without messing up you engine or head.

 

[Kbrown]

no pics of the spring yet, i can take one though if you want to see it. It snapped right in the middle almost on a slant type of break.

 

[ktraver97ss]

So I should expect to see the car for the detail soon?

 

[Carls2001ws6]

Hey what is the total lift of your cam? Are you using a different rocker ratio?

Just make sure your not over compressing your springs. If your even close to the max lift you might break others.

For example:
Sorry if your not a noobi:
Just from reading the list of things you've already done I assume your not, just want to make sure tho.

My cam with 1.7 rockers has a max lift of 0.581". My springs can handle 0.600" My stock springs would snap like twigs with the cam I chose. LS1 stock valve springs have a max lift of 0.479". LS6 stock springs are 0.525". Yea just make sure everything is within specs. Without knowing what the max lift of your cam has I just worry. I'd hate to see another one break. Worse case the valve could fall through and cause major engine damage.

Can you take a business card through any of the springs while completely compressed?
This way is not the most sophisticated way to do it, just a way to quickly check.

I hope everything works out for ya!

 

[Bob Kazamakis]

^^ The 105# comp cams springs have a history of breaking in 3800's.

 

[Turbocharged400sbc]

^^ The 105# comp cams springs that were switched to mexico production instead of being made by PAC springs have a history of breaking in everything.

fixed

 

[Kbrown]

yea, were good on compression, im on stock rockers currently with a xp cam ... not sure what the #'s for that as im still new to the cam'd world but im sure someone would.....

yea i had heard they had problems but i was told the set i bought were the run that didnt have issues.... what people will say to get shit sold....

and yes sir mr traver, u will see my car sunday for the detail and tinting!

anyway, hope to see u guys at lukes on thurs

 

[Carls2001ws6]

Did you get a car card when you got that cam?
Who made the cam?

I can try to help you out,
Comp cams makes what they call an XP Hot cam for the 3800 series

Copied this from some web site selling that cam
*
212°/224° at .050"
*
Intake Lift .325" (.520" lift at 1.6:1 rocker ratio)
*
Exhaust Lift .335" (.536" lift at 1.6:1 rocker ratio)
*
116 Lobe Separation

Yea find your cam card and this should help to determine weather or no you will have to worry about another spring breaking.

Now based upon what is here, depending weather or not your cam card is close, I would say that the lift is not going to compress the spring too much to break it. Also with the added information about the 105# springs breaking all the time, I'm back to scratching my head.

My last question for you is:
What kind of springs did you just pick up?

 

[Bob Kazamakis]

Did you not read his first post? He has a comp cams XP cam.

It's a manufacturing problem, not a lift issue. He didn't post what springs he put in though.

 

[Turbocharged400sbc]

gm switched to cheep springs on the s3's eric broke a 30k stock spring with a tiny vs cam...ive also seen another broken 105 comp, you could see the occlusion that led to the fracture

fuck outsourcing

 

[Carls2001ws6]

Did you not read his first post? He has a comp cams XP cam.

Um yea I did read it:
He did not say it was a Comp Cams cam shaft just that it was an XP cam.

I have come to find out real quick around here that there are a lot of people who like to point out spelling and grammar mistakes. I know your busting balls, just trying to help out.

Well anyway regardless of what kind of cam he has installed, I don't think a 3800 cam could physically have more than a 0.500" lift ( that I am aware of ) with out the use of some sort of aftermarket rockers. Cam lobs can not be bigger than the cam journals or you would never get it into the block.

So yea now it's important to know what kind of springs your using now.

 

[Bob Kazamakis]

Not trying to bust balls....but I guess somebody not within the 3800 community (former here) would know an xp cam is made by comp cams. My apologies.

 

[Turbocharged400sbc]

Um yea I did read it:
He did not say it was a Comp Cams cam shaft just that it was an XP cam.

I have come to find out real quick around here that there are a lot of people who like to point out spelling and grammar mistakes. I know your busting balls, just trying to help out.

Well anyway regardless of what kind of cam he has installed, I don't think a 3800 cam could physically have more than a 0.500" lift ( that I am aware of ) with out the use of some sort of aftermarket rockers. Cam lobs can not be bigger than the cam journals or you would never get it into the block.

So yea now it's important to know what kind of springs your using now.

the riv's is4 measured out at .604 at valve lift, any of the cams that go over .540 at valve lift (this is where the retainer hits the oem type valve seal on stock valves and guides) are reduced base circle cams
if you wanted to you could run oem 3800 rockers to .600 lift, with some shimming and custom pushrods, the guides wouldnt last long but you could...

20k on Al's Crow 105's *knock on wood* :rollpicard: