# The New Rims **URL:** \ **Category:** Shift518 Automotive\ **Created:** [June 7, 2008, 10:14am UTC](https://forums.speedlife.net/t/the-new-rims/237224 "2008-06-07T10:14:01Z")\ **Posts on this page:** 20\ **Page:** 7
**Author:** ![Johawk](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/johawk/32/6284_2.png) [@Johawk](https://forums.speedlife.net/u/Johawk)\ **Post date:** [June 9, 2008, 6:23pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/121 "2008-06-09T18:23:43Z")
When you have eight cylinders you can lose one and hardly notice… If you have four or even six and drop a cylinder it will be more out of balance. Get a tune, You will be surprised what a LS1 will do with headers and a good tune :nod ---
**Author:** ![94Gt5.0](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/94gt5.0/32/6377_2.png) [@94Gt5.0](https://forums.speedlife.net/u/94Gt5.0)\ **Post date:** [June 9, 2008, 6:23pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/122 "2008-06-09T18:23:54Z")
> [@Mk4 30R](#): > > maybe someday youll find your car and start working on it ;D Its buried!! lol, i might say fuck it and just buy a bike… ---
**Author:** ![SSmokinn\_SS](https://avatars.discourse-cdn.com/v4/letter/s/ec9cab/32.png) [@SSmokinn\_SS](https://forums.speedlife.net/u/SSmokinn_SS)\ **Post date:** [June 9, 2008, 6:24pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/123 "2008-06-09T18:24:10Z")
> [@Johawk](#): > > Its a little strange that it is only picking up a missfire on #5. If it were bad set of spark plugs or too cold/hot a heat range, or if it were way too rich/lean it would usually set a random multiple misfire code “P0300” well right now im starting to think that when I was doing my longtube install I might have hit the #5 plug and maybe damaged it somehow…I ended up having to take out #3 and #5 doing the install because they were in the way…I did try for a few minutes getting the header up in their with the plugs in…#5 was the plug keeping the header from sliding up. ---
**Author:** ![plaf713](https://avatars.discourse-cdn.com/v4/letter/p/439d5e/32.png) [@plaf713](https://forums.speedlife.net/u/plaf713)\ **Post date:** [June 9, 2008, 6:24pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/124 "2008-06-09T18:24:21Z")
> [@SSmokinn SS](#): > > maybe you missed what I was getting at…Jammer knew what I was talking about > > Im not gonna go pay 500$ for a dyno tune for bolt on’s when Im gonna be putting a head/cam package on the car in the future…so Then I would hafto start all over on the tune again… > > Also, I will not be sending out my PCM to get a tune. I have heard bad things about that and good things. Not my cup of tea. I would rather tune it myself to actually know whats going on instead of having my PCM hooked up to a computer and people “guessing” what fuel needs to be added/removed…timing needs to be adjusted etc… i get what your saying but its foolish to not tune, ive done it three or four times now and have other friends that have done it as well, the stuff comes out great, but its your car, your just leaving a lot on the table ---
**Author:** ![94Gt5.0](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/94gt5.0/32/6377_2.png) [@94Gt5.0](https://forums.speedlife.net/u/94Gt5.0)\ **Post date:** [June 9, 2008, 6:25pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/125 "2008-06-09T18:25:26Z")
> [@Johawk](#): > > When you have eight cylinders you can lose one and hardly notice… If you have four or even six and drop a cylinder it will be more out of balance. > > Get a tune, You will be surprised what a LS1 will do with headers and a good tune :nod Good example is my buddies 99Gt, we were putting the new camshafts in, did a leakdown test on it and the #2cyl was down 75%!!! Never noticed. ---
**Author:** ![SSmokinn\_SS](https://avatars.discourse-cdn.com/v4/letter/s/ec9cab/32.png) [@SSmokinn\_SS](https://forums.speedlife.net/u/SSmokinn_SS)\ **Post date:** [June 9, 2008, 6:25pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/126 "2008-06-09T18:25:33Z")
> [@plaf713](#): > > i get what your saying but its foolish to not tune, ive done it three or four times now and have other friends that have done it as well, the stuff comes out great, but its your car, your just leaving a lot on the table me and my friend already did some timing advancement etc. the other day…just havent gotten into fuel tuning yet, and wont until my misfire is fixed. ---
**Author:** ![SSmokinn\_SS](https://avatars.discourse-cdn.com/v4/letter/s/ec9cab/32.png) [@SSmokinn\_SS](https://forums.speedlife.net/u/SSmokinn_SS)\ **Post date:** [June 9, 2008, 6:28pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/127 "2008-06-09T18:28:36Z")
> [@94Gt5.0](#): > > Good example is my buddies 99Gt, we were putting the new camshafts in, did a leakdown test on it and the #2cyl was down 75%!!! Never noticed. explain what consist’s of a “leakdown” test??? the car runs like a rapped ape WOT…pulls hard in every single gear. Even with normal acceleration, it doesnt skip a beat. Only time it misfires is on a idle, and when im in 5th/6th gear around 1300-1800rpms going uphill accelerating. ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [June 9, 2008, 6:29pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/128 "2008-06-09T18:29:04Z")
> [@SSmokinn SS](#): > > maybe you missed what I was getting at…Jammer knew what I was talking about > > Im not gonna go pay 500$ for a dyno tune for bolt on’s when Im gonna be putting a head/cam package on the car in the future…so Then I would hafto start all over on the tune again… > > Also, I will not be sending out my PCM to get a tune. I have heard bad things about that and good things. Not my cup of tea. I would rather tune it myself to actually know whats going on instead of having my PCM hooked up to a computer and people “guessing” what fuel needs to be added/removed…timing needs to be adjusted etc… i see your point and plafs but its obviously not a tune issue as it was doin it before hand …but for arguments sake pcmforless is awsome brian did my tune to get car runnin and i only had to mod it a little off spray and alot on spray …now onto the plug situation champion sucks instead of havin a solid rod in the porcelin for spark transfer they use a spring wich sucks as it breaks very easy …he also has missfires on cyl 4 also he has 2 cyls missin only under load secondary ign is my guess due to a shitty plug he went from bad to worse am i sayin it will fix it fuck no but its a great startin point as the weak link is the plugs ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [June 9, 2008, 6:31pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/129 "2008-06-09T18:31:43Z")
dont worry bout leakdown at this stage its easy to do but highly doubtfull its that car runs to strong and no miles or fuel in oil just relax for now and do as i said BITCH ;D ---
**Author:** ![94Gt5.0](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/94gt5.0/32/6377_2.png) [@94Gt5.0](https://forums.speedlife.net/u/94Gt5.0)\ **Post date:** [June 9, 2008, 6:32pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/130 "2008-06-09T18:32:44Z")
A leakdown test is also sometimes called a cylinder differential test . A leak down test pinpoints where you are losing compression and exactly how much. You should do a compression test first. Doing a leak-down test diagnoses where you’re losing compression before you open up your engine. ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [June 9, 2008, 6:33pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/131 "2008-06-09T18:33:28Z")
right ;D ---
**Author:** ![94Gt5.0](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/94gt5.0/32/6377_2.png) [@94Gt5.0](https://forums.speedlife.net/u/94Gt5.0)\ **Post date:** [June 9, 2008, 6:34pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/132 "2008-06-09T18:34:12Z")
> [@88slowmarro](#): > > dont worry bout leakdown at this stage its easy to do but highly doubtfull its that car runs to strong and no miles or fuel in oil just relax for now and do as i said BITCH ;D Neither did my buddies car, and the #2cyl was almost dead, ran pretty strong too… ---
**Author:** ![SSmokinn\_SS](https://avatars.discourse-cdn.com/v4/letter/s/ec9cab/32.png) [@SSmokinn\_SS](https://forums.speedlife.net/u/SSmokinn_SS)\ **Post date:** [June 9, 2008, 6:35pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/133 "2008-06-09T18:35:25Z")
> [@94Gt5.0](#): > > A leakdown test is also sometimes called a cylinder differential test . A leak down test pinpoints where you are losing compression and exactly how much. You should do a compression test first. Doing a leak-down test diagnoses where you’re losing compression before you open up your engine. correct me if im wrong but would the lower compression cylinder have blow by?? ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [June 9, 2008, 6:37pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/134 "2008-06-09T18:37:04Z")
i understand that but the lsx series motor has a noticable piston slap when cold and if they leak down that much you would hear it when warm as per gm tech training on them am i sayin its the end all be all no but i wouldnt scare like that at this stage car is smoth and quiet ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [June 9, 2008, 6:37pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/135 "2008-06-09T18:37:42Z")
> [@SSmokinn SS](#): > > correct me if im wrong but would the lower compression cylinder have blow by?? yes but not all the time most of it ---
**Author:** ![Johawk](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/johawk/32/6284_2.png) [@Johawk](https://forums.speedlife.net/u/Johawk)\ **Post date:** [June 9, 2008, 6:37pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/136 "2008-06-09T18:37:52Z")
not if its a leaking valve… ---
**Author:** ![94Gt5.0](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/94gt5.0/32/6377_2.png) [@94Gt5.0](https://forums.speedlife.net/u/94Gt5.0)\ **Post date:** [June 9, 2008, 6:38pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/137 "2008-06-09T18:38:54Z")
> [@Johawk](#): > > not if its a leaking valve… :nod ---
**Author:** ![SSmokinn\_SS](https://avatars.discourse-cdn.com/v4/letter/s/ec9cab/32.png) [@SSmokinn\_SS](https://forums.speedlife.net/u/SSmokinn_SS)\ **Post date:** [June 9, 2008, 6:40pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/138 "2008-06-09T18:40:14Z")
> [@Johawk](#): > > not if its a leaking valve… also, the SES hasnt came on once while I was WOT…and thats going from 30-145. Wont blink once, wont skip a beat and burrys the speedo in a hurry…only misfire’s at idle and heavy load in 6th at low rpm acceleration. leaking valve…wouldnt it have a bigger problem seating WOT, causing the misfire to get worse? and wouldnt the plug be burning wet from a incomplete combustion from a leaking valve? ---
**Author:** ![88slowmarro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/88slowmarro/32/6339_2.png) [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)\ **Post date:** [June 9, 2008, 6:41pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/139 "2008-06-09T18:41:34Z")
also cause a missfire at more times than at idle or loaded rpm,s if it was a valve ---
**Author:** ![Johawk](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/johawk/32/6284_2.png) [@Johawk](https://forums.speedlife.net/u/Johawk)\ **Post date:** [June 9, 2008, 6:43pm UTC](https://forums.speedlife.net/t/the-new-rims/237224/140 "2008-06-09T18:43:08Z")
have you postedon LS1tech yet? [Previous page](https://forums.speedlife.net/t/the-new-rims/237224.md?page=6) [Next page](https://forums.speedlife.net/t/the-new-rims/237224.md?page=8)