dp still kr

**gotboost3** · 02-27-2009

ok my mods are 3 in offroad dp and intake with colder plugs and im still getting 1.7 kr? and sometimes 3* above 75mph i dont get it a stock gtp with exhaust mods still has knock? im lost do i need a tune this badly help please

**Bio248** · 02-27-2009

tune, stat. the tune is the key in EVERY setup. get a vendor PCM for now, but later on in your modding your going to need a more custom tune to get the most of your mods.

**gotboost3** · 02-28-2009

i a noticed after the DP install i back fire....any ideas?

**UR LOSN** · 03-01-2009

it is normal under accel and let off...it happens. Get a tune, and it should alleviate your problems....

**98SilvermistGTP** · 03-02-2009

I dont know about the backfire thing man. I didnt have any backfires after I did my downpipe. I have a high flow cat though. You might have a bit of an exhaust leak at the manifold connection.

**copgtp** · 03-03-2009

What type of a "backfire" are we talking here???? Is it an obvious miss on a cylinder?? Your engine retards the timing when you let off the gas, you might be hearing that.

Also, you need an aftermarket PCM. I hear Overkill performance makes good ones. Do yourself a favor and stay away from Intense for PCM's

**blowfishRus6** · 03-03-2009

why intense?? people usally say good things about them, zzp is the bad one. and my car pops or "backfires" when i let off the gas. its just the 3.8 huffing

**gotboost3** · 03-03-2009

yeah its when i let off and ok then i guess its not uncommon ahha

**badbrad** · 03-03-2009

i would def at least get a plog and reweld and grind out the rear manifold. it will help tremedously. headers are best but me and wife are in school w/2 teenagers. i did a ceramic plog, worked the rear mani, then wrapped a crossover and rear mani,,,later bought the zzp 3" n/cat, n/resonator and i'm done with the exhaust

**blowfishRus6** · 03-03-2009

and thats a good way to go about it. headers are not always needed, i just like the performance i got with mine

**badbrad** · 03-04-2009

1 day i'll buy headers.....maybe obama will buy them 4 me.........my opinion is if u r buying ( at the same time) a dp and a plog u'll spend the same on ebay headers.

**04compggtp** · 03-04-2009

How much does wrapping the cross over and plog help? What works best, and are there any specific procedures for doing this?

**Sabrewings** · 03-04-2009

ZZP says not to wrap the plog. I've seen them develop cracks from it.

**badbrad** · 03-04-2009

no do not wrap plog, i got mine coated.....i only wrapped crossover and rear. u can get thr 2"wide wrap from advance auto or autozone. folow directions and use the paint it recommends. if it rust out 2 yrs from now, who cares? my coated front plog is sweet for the $. but remember if u r doing a d/p and a plog, + your wrap...headers from ebay would be my personal choice....

**04compggtp** · 03-05-2009

thanks for the info! will wrapping a stainless plog still crack? or just the regular plog?

**badbrad** · 03-06-2009

i know for sure that u do not need to wrap a ceramic plog(per zzp) very heat efficient

**Sabrewings** · 03-07-2009

Originally Posted by 04compggtp

thanks for the info! will wrapping a stainless plog still crack? or just the regular plog?

Isn't really any need to wrap stainless. It doesn't really radiate heat. I know they're fairly tough since mine once got so hot it was glowing, but I still wouldn't want to chance it.

**blowfishRus6** · 03-07-2009

i noticed you said yours was glowing when it idle at 2500rpm for about 30 mins. if you drive down the highway for a while does it glow then?? that would be cool

**Sabrewings** · 03-07-2009

Originally Posted by blowfishRus6

i noticed you said yours was glowing when it idle at 2500rpm for about 30 mins. if you drive down the highway for a while does it glow then?? that would be cool

I don't know about you, but at 85MPH my RPMs are barely over 2000. Plus you've got all that air moving through there...

**blowfishRus6** · 03-07-2009

yea. o well

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