2 Week Old 98 Shooting Horribly
Printed From: Tippmann Paintball
Category: Paintball Equipment
Forum Name: Gun Maintenace and Repair
Forum Description: Important info for keeping your marker in top shape
URL: http://www.tippmannsports.com/forum/wwf77a/forum_posts.asp?TID=176869
Printed Date: 17 April 2026 at 8:13pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: 2 Week Old 98 Shooting Horribly
Posted By: TSI27
Subject: 2 Week Old 98 Shooting Horribly
Date Posted: 15 July 2008 at 1:05pm
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Purchased a Tippmann 98 2 weeks ago, loaded up some Visible Impact paintballs and was getting REALLY good accuracy for a great gun, I actually couldnt believe it. At about 140 feet I was getting 1 foot groupings. Then a week later my 14" J&J Ceramic Barrel and Car Stock came in. When I went to install those I also polished the interals and put everything back in. When I went to fire the gun was working fine but the accuracy and range was HORRIBLE. Max effective range was about 70 feet and the paintballs were dipping down horribly. I noticed a leak through one of my valve screws and later found out it was stripped. Everything else seems perfectly fine. Would a stripped slightly leaky valve screw hurt range and accuracy? On all my other friends 98s, purchased at the same time from the same place, you cant even see the paintballs travel, all you see is them hitting the target. ------------- Tippmann 98 Custom Polished Internals 14" J&J Ceramic Barrel Upgraded Drive Spring 6 Position Carbine Stock Red Dot Sight |
Replies:
Posted By: TSI27
Date Posted: 15 July 2008 at 1:08pm
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Also Im getting quite a lot of CO2 out of the bolt area, you can see a puff everytime it shoots. I know there is going to be some blowback which blows back the hammer/piston but it seems like its doing it more then usual. ------------- Tippmann 98 Custom Polished Internals 14" J&J Ceramic Barrel Upgraded Drive Spring 6 Position Carbine Stock Red Dot Sight |
Posted By: slackerr26
Date Posted: 15 July 2008 at 1:24pm
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i think you need to buy some better paint. crappy paint tends to give you horrible accuracy. or your velocity is up way to high. is the paint going in crazy directions every time? the co2 coming out of the bolt area is normal.
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Posted By: TSI27
Date Posted: 15 July 2008 at 1:25pm
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Its not crappy paint, Game Face Visible Impact, has a 9.1 review on PBreview and it was shooting perfectly fine with the stock barrel before. Velocity was never touched. Now it just shoots about 70 feet dipping down like it wasn't as powerful as before. ------------- Tippmann 98 Custom Polished Internals 14" J&J Ceramic Barrel Upgraded Drive Spring 6 Position Carbine Stock Red Dot Sight |
Posted By: unvolution
Date Posted: 15 July 2008 at 1:28pm
| does it still shoot fine with the stock barrel? maybe you did something when you polished it |
Posted By: oldpbnoob
Date Posted: 15 July 2008 at 1:48pm
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Which Valve screw are you talking about? Post a pic. Any leak is not good and can lead to loss of range due to loss of pressure. Also, if you took the marker apart, you will need to rechrono it. What FPS are you shooting? ------------- "When I grow up I want to marry a rich man and live in a condor next to the beach" -- My 7yr old daughter. |
Posted By: TSI27
Date Posted: 15 July 2008 at 1:50pm
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Nope even with stock barrel still has bad accuracy/range. I called Tippmann and they said that it might be the valve leaking which is causing it not to use all of the CO2 to propel the paintball. I just dont understand how it would act so completely different. The only difference from before and after I can think of is the one stripped valve screw. ------------- Tippmann 98 Custom Polished Internals 14" J&J Ceramic Barrel Upgraded Drive Spring 6 Position Carbine Stock Red Dot Sight |
Posted By: TSI27
Date Posted: 15 July 2008 at 1:52pm
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Im not sure what Im shooting at, I just got the gun 2 weeks ago and it was shooting perfectly fine. Its leaking from the valve screw on the right half of the gun. I took out the screw and the aluminum threading came out also so I know its stripped. ------------- Tippmann 98 Custom Polished Internals 14" J&J Ceramic Barrel Upgraded Drive Spring 6 Position Carbine Stock Red Dot Sight |
oldpbnoob wrote:Posted By: im_new
Date Posted: 15 July 2008 at 3:46pm
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fill ur co2 tank ------------- 98 custom pro e-trigger flatline torque loader tippmann expansion chamber |
Posted By: TSI27
Date Posted: 15 July 2008 at 5:30pm
No way? Can I get someone with some actual experience to respond instead of 14 year old kids? ------------- Tippmann 98 Custom Polished Internals 14" J&J Ceramic Barrel Upgraded Drive Spring 6 Position Carbine Stock Red Dot Sight |
Posted By: slackerr26
Date Posted: 15 July 2008 at 5:42pm
this is coming from you, who cant fix your own marker. people here actually have experience -------------
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Posted By: Mack
Date Posted: 15 July 2008 at 5:49pm
^^^That is a very good way to get no responses at all around here. The more information you provide, the easier it is for folks on here to help you. The minimum necessary is the type of marker, the type of propellant and any upgrades made to the marker. From the posts above I gathered the following:
Possible causes of your problem based on limited information provided:
Additional information about the leak would be useful as well. For instance which screw is it? Is air coming out anyplace else such as around the trigger or down the barrel? One final note; the description you provided of how your friends markers operate makes me think they might be shooting hot. How long has it been since they chronoed their markers? ------------- 
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Posted By: K Hop
Date Posted: 15 July 2008 at 6:25pm
you bought new paint right? it wasn't leftover from two weeks ago? |
Posted By: Internecine
Date Posted: 15 July 2008 at 6:45pm
Your velicoty seems quite high. When i went to a paintball field, they forced em to turn mine down, and mine didnt nearly shoot far or straight as yours. Jeeze. |
Posted By: TSI27
Date Posted: 15 July 2008 at 7:16pm
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Just because I haven't posted here does not mean I don't have experience. I could probably take apart your gun with a blindfold in 30 seconds.
All my mods were previously stated and are also in my sig. Also, Ive said what kind of paint I was using.
I only play woodsball and haven't really been to a field to chrono my guns much. I meant velocity was never touched as in I never played with the FVA screw.
Again, as I stated before the leak is coming out of the valve screw on the right side of the marker frame. No offense, but Im starting to think you barely read any of my posts.
Chronoed 285 each out of the box, we had the same performance when we first got our markers. ------------- Tippmann 98 Custom Polished Internals 14" J&J Ceramic Barrel Upgraded Drive Spring 6 Position Carbine Stock Red Dot Sight |
Posted By: slackerr26
Date Posted: 15 July 2008 at 10:51pm
im willing to bet every single thing that i own that you couldn't
take my gun apart in two minutes. and if you have experience, it
shouldnt be hard to figure out your problem -------------
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Posted By: TSI27
Date Posted: 16 July 2008 at 8:46am
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Im pretty sure its just the valve leaking, I was asking if anyone had a similar issue. Don't post if you don't have anything useful. ------------- Tippmann 98 Custom Polished Internals 14" J&J Ceramic Barrel Upgraded Drive Spring 6 Position Carbine Stock Red Dot Sight |
Posted By: oldpbnoob
Date Posted: 16 July 2008 at 8:56am
And if the 14 year old comment is/was aimed at me, I am flattered that you would think I look that good for my age, but I am probably more than old enough to be your father. Play nice and maybe you will get the help you need. ------------- "When I grow up I want to marry a rich man and live in a condor next to the beach" -- My 7yr old daughter. |
Posted By: TSI27
Date Posted: 16 July 2008 at 9:15am
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Don't flatter yourself then, it was actually aimed towards the person who told me to fill up my tank ------------- Tippmann 98 Custom Polished Internals 14" J&J Ceramic Barrel Upgraded Drive Spring 6 Position Carbine Stock Red Dot Sight |
Posted By: Mack
Date Posted: 16 July 2008 at 3:26pm
Actually, I did read your post. Normally I would get pissy back at you, but I kind of deserved that reply. In my defense, this is the normal result when I try to do anything useful during an optical migraine. In regards to your problem: I think you have bigger issues than just a stripped screw. Whenever I work on a valve I always test the valve and fittings before it goes back in the marker. While it is probably not safe, what I do is hold the powertube/valve/hose/ASA assembly in my hand and screw an air tank into the ASA. (I generally use compressed air for this and always have eye protection on, but it still isn't really a good idea.) I do this so I don't have the valve back in when I discover any leaks because I'm kind of lazy and don't want to take the marker apart repeatedly. If I've put it together correctly there is no air loss. With this in mind, I would recommend checking for powertube damage, damage to the valve itself, and the condition of the valve o-ring. Also, since this is a new marker, keep in mind that it is still under warranty. Final note: I've seen excessive internal polishing remove sufficient shell material that the hammer o-ring failed to seal, but I can't imagine a way that such a situation could be involved in the leak you're describing. I only mentioned it because of the statement quoted below:
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Posted By: TSI27
Date Posted: 16 July 2008 at 4:57pm
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Yea I pictured the same thing you said about the valve and valve o-ring. Checked the power tube and theres no cracks or any damage. I called up Tippmann and their sending me a new valve, hammer o-ring and drive spring. Hopefully when I take out the old valve from the power tube when my parts arrive, Im going to pressure test it and make sure their arent any hairline cracks. If there aren't, and the new valve/hammer o-ring/drive spring don't fix the problem Im just going to send it in to Tippmann. They have GREAT customer support btw, asked me if I needed any other parts and didn't charge me a dime. ------------- Tippmann 98 Custom Polished Internals 14" J&J Ceramic Barrel Upgraded Drive Spring 6 Position Carbine Stock Red Dot Sight |
Posted By: Mack
Date Posted: 17 July 2008 at 1:11am
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^^^Good luck with that. Let us know what the end result is.
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Posted By: carl_the_sniper
Date Posted: 17 July 2008 at 1:52pm
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I kinda skimmed through it but did anyone else mention that it could also either be the polished internals mod that he did or the addition of a stock if it messed up the spring? ------------- <just say no to unnecessarily sexualized sigs> |
Posted By: TSI27
Date Posted: 17 July 2008 at 2:01pm
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Stock is the same depth as the stock end cap, even added a BB as a spacer to give it a stronger pull. ------------- Tippmann 98 Custom Polished Internals 14" J&J Ceramic Barrel Upgraded Drive Spring 6 Position Carbine Stock Red Dot Sight |
Posted By: TSI27
Date Posted: 19 July 2008 at 12:20pm
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Well I guess I was right. I got a new valve , hammer o-ring and drive spring which seemed to do the trick. Now my gun is actually shooting hard and stronger and more accurately. Only problem I have now is from time to time Im getting a SMALL amount of frost/ice which hopefully will be fixed with an expansion chamber. Is the GTA chamber a good chamber? Im looking for something that looks stock yet function right. I think its a 4 chamber but am not sure. ------------- Tippmann 98 Custom Polished Internals 14" J&J Ceramic Barrel Upgraded Drive Spring 6 Position Carbine Stock Red Dot Sight |