Cracking under heavier load

R

rllndg17

Member

Jun 9, 2004

129

0

17

Sep 17, 2006

#1

• Sep 17, 2006

• #1

I've noticed this for a while and it's starting to bother me so I thought I'd put a post in for opinions/suggestions. Whenever I gas it hard in 3rd, 4th of 5th w/ or w/o ac on, I hear a rattling sound. Sometimes it lasts just a second, some others it goes on for a little longer and goes away. It's a rattling sound and I'm scared it might be pinging. It sounds like if someone were to take a bolt, put it in a tin cup, and shake it around real fast. It may just be me but it also feels like I lose power when it does this. I put 93 octane in my car (I have a 91 octane tune on the sct). Any ideas or suggestions as to what it may be and how I can fix or ignore it?

Gabe

 

jasonh_86

I

May 20, 2005

1,156

2

48

Arkansas

Sep 17, 2006

#2

• Sep 17, 2006

• #2

That sounds just like pinging

Just try to get some Octane booster or get gas at another gas station.. what station do you use right now?

 

BurningRubber

10 Year Member

Dec 6, 2004

1,865

24

58

Sep 17, 2006

#3

• Sep 17, 2006

• #3

Pinging. I just developed the problem too.

Too much throttle under load is what does it for me. I was racing a buddy of mine today, I was in 4th under WOT at like 35-3600 RPM and it started pinging.

Put some 93 oct. in it after that... imagine its COP time. MAF was just cleaned, new plugs, new fuel filter, cleaned IAC valve...

 

R

rllndg17

Member

Jun 9, 2004

129

0

17

Sep 17, 2006

#4

• Sep 17, 2006

• #4

Well, usually chevron, exxon, or shell always 93 octane. The tune is rated at 91 I thought maybe that was causing it to ping if the car is not liking some of the settings...I might try to lose the tune and see how that works and then change some of the parameters, but I haven't messed with it besides going from stock to preset tune and checking engine codes.

Gabe

*the car has 31k miles, I cleaned the MAF maybe 4 months ago, and I always put in 93 octane

 

BurningRubber

10 Year Member

Dec 6, 2004

1,865

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Sep 17, 2006

#5

• Sep 17, 2006

• #5

Maybe its time for some Seafoam...

 

R

rllndg17

Member

Jun 9, 2004

129

0

17

Sep 17, 2006

#6

• Sep 17, 2006

• #6

I seafoamed not too long ago, maybe 6 or 7 months. I cleaned my maf and bought some octane booster/cleaner at walmart...It was still pinging even though it's night and cooler but only when I slammed the gas pedal and for a split second.

Gabe

 

ADRENLN

Active Member

Apr 16, 2003

2,342

3

49

NJ

Sep 18, 2006

#7

• Sep 18, 2006

• #7

id get get a dyno tune. hopefully that helps.