Chasing down an air leak........ could it be? - Page 3 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Devryn17 · 05-31-2011, 05:29 PM

If you have an air leak, you should be able to hear it.

Stupid simple question: Have you checked for a fouled plug, or have you made sure you have the right gap/hot for your car with your supercharger?

PQ · 05-31-2011, 05:31 PM

Quote:

Originally Posted by Speedy1975

Are you seeing any CEL codes? Typically with any VAC leak you'll get a CEL especially if it's bad enough to cause the engine to idle erratically.

Is it just a bad idle (erratic) or are you sure it's a true miss of the engine?

Did you post up video?

Oh, ya. I had gotten the random misfire code. P0300

Quote:

Originally Posted by Devryn17

If you have an air leak, you should be able to hear it.

Stupid simple question: Have you checked for a fouled plug, or have you made sure you have the right gap/hot for your car with your supercharger?

Have changed all the plugs.

Devryn17 · 05-31-2011, 05:33 PM

Quote:

Originally Posted by PQ

Oh, ya. I had gotten the random misfire code. P0300

Have changed all the plugs.

You're certain they're the right plugs and that they're gapped right? You didn't drop one or bang one and mess up the gap? I've done this, and had a very similar problem.

Whipped416 · 05-31-2011, 05:35 PM

i will tell u bro go get a smoke machine and do that u will find the leak if u have one... only way to go !!.. GOOD LUCK

Ject · 05-31-2011, 05:37 PM

Have the wife take a look and see if she can find anything?

You said Post it and you'd try it!

PoleCat2SSRS2010 · 05-31-2011, 05:43 PM

Did this all start after installing the bloser?

Fuel quality? did you try bumping up the octane?

Misfires are sometimes the basics. check all the plugs plug wires and coils for proper condition, a cyinder leakdown test and compression test, bad valves and/or seats can cause the same misfire/surge effect.

Is this at low rpms or all rpms or mid to high rpms? High cyclinder pressure due to boost can require a hotter spark than the OEM can provide. High compression/pressure engines need hotter spark to keep the fire going on the plugs.

Just throwing out ideas but stay with the basics before eliminating the deeper harder to solve areas.

PQ · 05-31-2011, 06:10 PM

Quote:

Originally Posted by Devryn17

You're certain they're the right plugs and that they're gapped right? You didn't drop one or bang one and mess up the gap? I've done this, and had a very similar problem.

Possitive. I actually bought 8 new plugs. TR6 plugs. One of them was bad, or I broke it inadvertently. When I changed them it was misfiring much worse. So it gave off a code. Cylinder 8 misfire. So I moved the number 8 cylinder to the number 1 spot and the 1 to the 8 spot and the code said misfire cylinder 1. Went and bought a new plug and put it in 1 and it ran fine.

Fine being the way it did before. Gapped them correctly yes. Was very maticulous in doing so.

Quote:

Originally Posted by blakewolf07

i will tell u bro go get a smoke machine and do that u will find the leak if u have one... only way to go !!.. GOOD LUCK

I suppose I should.

Quote:

Originally Posted by Ject

Have the wife take a look and see if she can find anything?

You said Post it and you'd try it!

Sounds good to me. lol

Quote:

Originally Posted by PoleCat2SSRS2010

Did this all start after installing the bloser? Yes.

Fuel quality? did you try bumping up the octane? I let Vengeance set it.

Misfires are sometimes the basics. .... a cyinder leakdown test and compression test, bad valves and/or seats can cause the same misfire/surge effect. This is the most unlikely so will be last. It only reveals bad news if it's the culprit. lol

Is this at low rpms or all rpms or mid to high rpms? High cyclinder pressure due to boost can require a hotter spark than the OEM can provide. High compression/pressure engines need hotter spark to keep the fire going on the plugs.

Just throwing out ideas but stay with the basics before eliminating the deeper harder to solve areas.

Good stuff.

Only low RPMs are doing it. High RPMs are either not doing it, or are not detectable

HufferSS · 05-31-2011, 07:24 PM

What are your fuel trims doing? Are they showing a vacuum leak?

CMORGAN · 05-31-2011, 07:39 PM

I HAVE GREAT RESULTS WITH SMOKE MACHINE IT SHOWS OFF AND YOU CAN PRESSURIZE FOR LEAKS AS REQUIRED

PQ · 05-31-2011, 07:52 PM

Quote:

Originally Posted by HufferSS

What are your fuel trims doing? Are they showing a vacuum leak?

I don't know. Tuner didn't tell me.

He just said I have an air leak. He tuned it for the proper trims. That's all he said. And he told me I have an air leak.

Quote:

Originally Posted by CMORGAN

I HAVE GREAT RESULTS WITH SMOKE MACHINE IT SHOWS OFF AND YOU CAN PRESSURIZE FOR LEAKS AS REQUIRED

Ok. Meet me at the shop.

HufferSS · 05-31-2011, 08:19 PM

Quote:

Originally Posted by PQ

I don't know. Tuner didn't tell me.

He just said I have an air leak. He tuned it for the proper trims. That's all he said. And he told me I have an air leak.

Ok. Meet me at the shop.

Do you have a scan tool? Plug it in and see what is up with the O2 readings and the fuel trims. If you are getting unmetered air into the system then your O2 should be reading lean and the computer should be adding fuel to enrich the mixture.

PQ · 05-31-2011, 08:22 PM

Quote:

Originally Posted by HufferSS

Do you have a scan tool? Plug it in and see what is up with the O2 readings and the fuel trims. If you are getting unmetered air into the system then your O2 should be reading lean and the computer should be adding fuel to enrich the mixture.

I left it at Vengeance for Mike to put my tune on.

Speedy1975 · 05-31-2011, 09:01 PM

Ok. Random misfire is nothing to play with on a supercharged car. I take it that's not happening now? No more codes?

I'd like to see some logs from your scan tool. The fuel trims being mentioned can point us in the right direction if there is a vac leak. Like was mentioned, if un-metered air is entering the system, the ECM will try to compensate for it by throwing fuel at it. You should see very positive fuel trims.

Did you ever have a canned Magnuson tune in the car? If not can you load it and see if the results are the same?

Were the plugs you took out of the car in there with the supercharger installed and this problem occurring? If so, take close up pictures of the tips of the plugs and post them up for us to see.

I'm not convinced it's an air leak.......yet. I'd expect to see high idle with an air leak, not a hesitation like your showing in the video.

Take some video up around the engine bay...specifically around each head and post that up as well.

Finally, 6lbs of boost or ?

epstein · 05-31-2011, 10:06 PM

get rid of those plugs......put platinums back in and watch.

05-31-2011, 05:29 PM	#29
Devryn17 Suffers Fools Poorly Drives: 2010 SS/RS, CGM w/ Silver Stripes. Join Date: May 2011 Location: Coolidge, AZ Posts: 1,117	If you have an air leak, you should be able to hear it. Stupid simple question: Have you checked for a fouled plug, or have you made sure you have the right gap/hot for your car with your supercharger? __________________ 2010 2SS/RS, CGM w/ silver stripes. Hurst Shifter, long tube headers, full exhaust, CAI, tune. SAE 407 RWHP/402 RWTQ Momma didn't bronze my shoes, but when I turned 16 I inherited a lead foot.

05-31-2011, 05:37 PM	#33
Ject aka Patrick Drives: '10 Camaro 2SS '04 Silverado Join Date: Jan 2009 Location: Derby Kansas Posts: 3,072	Have the wife take a look and see if she can find anything? You said Post it and you'd try it! __________________ Current Modifications: Your average Bolt-ons & Suspension Upgrades GForce Engineering: 9" Rear End, Strange Pro Iron Case w/Moser Nodular 3.70:1 Detroit locker, 3.5" Solid Drive Shaft

05-31-2011, 09:01 PM	#41
Speedy1975 FASTER! Drives: Challenger Hellcat, 2SS Camaro Join Date: Apr 2008 Location: Middle Tennessee Posts: 2,245	Ok. Random misfire is nothing to play with on a supercharged car. I take it that's not happening now? No more codes? I'd like to see some logs from your scan tool. The fuel trims being mentioned can point us in the right direction if there is a vac leak. Like was mentioned, if un-metered air is entering the system, the ECM will try to compensate for it by throwing fuel at it. You should see very positive fuel trims. Did you ever have a canned Magnuson tune in the car? If not can you load it and see if the results are the same? Were the plugs you took out of the car in there with the supercharger installed and this problem occurring? If so, take close up pictures of the tips of the plugs and post them up for us to see. I'm not convinced it's an air leak.......yet. I'd expect to see high idle with an air leak, not a hesitation like your showing in the video. Take some video up around the engine bay...specifically around each head and post that up as well. Finally, 6lbs of boost or ? __________________ -Speedy 2016 Go Mango Challenger Hellcat (PB E.T. in 1/4 Mile 9.83 @ 140MPH)

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05-31-2011, 05:35 PM	#32
Whipped416 Drives: 2010 CAMARO SS Join Date: Mar 2011 Location: Texas Posts: 1,515 View My Garage	i will tell u bro go get a smoke machine and do that u will find the leak if u have one... only way to go !!.. GOOD LUCK

05-31-2011, 05:43 PM	#34
PoleCat2SSRS2010 R6P Marketing Lab Rat Drives: sometimes Join Date: Feb 2009 Location: Texas Posts: 339	Did this all start after installing the bloser? Fuel quality? did you try bumping up the octane? Misfires are sometimes the basics. check all the plugs plug wires and coils for proper condition, a cyinder leakdown test and compression test, bad valves and/or seats can cause the same misfire/surge effect. Is this at low rpms or all rpms or mid to high rpms? High cyclinder pressure due to boost can require a hotter spark than the OEM can provide. High compression/pressure engines need hotter spark to keep the fire going on the plugs. Just throwing out ideas but stay with the basics before eliminating the deeper harder to solve areas.

05-31-2011, 07:24 PM	#36
HufferSS I Wanna Go Faster!! Drives: 2011 2SS Synergy Green M6 Join Date: Apr 2011 Location: SC Posts: 3,323	What are your fuel trims doing? Are they showing a vacuum leak?

05-31-2011, 07:39 PM	#37
CMORGAN Drives: 2010 CAMARO SS Join Date: Aug 2010 Location: AMHERSTVIEW Posts: 1	I HAVE GREAT RESULTS WITH SMOKE MACHINE IT SHOWS OFF AND YOU CAN PRESSURIZE FOR LEAKS AS REQUIRED

05-31-2011, 10:06 PM	#42
epstein Account Suspended Drives: SS/RS Join Date: May 2010 Location: Transplanted from NYC..(ret. NYPD).Now in CT Posts: 904	get rid of those plugs......put platinums back in and watch.