Low fps on tippmann 98

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   Hi, sorry about this but i've been having some trouble with my 98 custom...i was playing fine and then the velocity seemed to drop pretty drastically, after a while i went to the chrono and where before it had been on about 260fps it was now around the 100 mark and with the screw turned all the way out it topped out at around 170/180 (i fired off a fair few shots to let it settle but no good). I still had plenty of air left (running a 72ci pmi 3000psi tank) but i filled up again anyway but still had the same problem...
I haven't opened it up yet but as i don't really know what anything does or what stuff is supposed to look like it wouldn't do me any good at the moment anyway but i was hoping someone might have an idea as to what could be causing this/how to check it/what to do to fix it?
thanks a lot for any help
cheers
Lee

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LeeE Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 08 July 2006 Location: United Kingdom Status: Offline Points: 6	Post Options Post Reply Quote LeeE Report Post Thanks(0) Quote Reply Topic: Low fps on tippmann 98 Posted: 15 October 2006 at 1:41pm
	Hi, sorry about this but i've been having some trouble with my 98 custom...i was playing fine and then the velocity seemed to drop pretty drastically, after a while i went to the chrono and where before it had been on about 260fps it was now around the 100 mark and with the screw turned all the way out it topped out at around 170/180 (i fired off a fair few shots to let it settle but no good). I still had plenty of air left (running a 72ci pmi 3000psi tank) but i filled up again anyway but still had the same problem... I haven't opened it up yet but as i don't really know what anything does or what stuff is supposed to look like it wouldn't do me any good at the moment anyway but i was hoping someone might have an idea as to what could be causing this/how to check it/what to do to fix it? thanks a lot for any help cheers Lee

Bandit5 Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 14 August 2006 Status: Offline Points: 119	Post Options Post Reply Quote Bandit5 Report Post Thanks(0) Quote Reply Posted: 15 October 2006 at 2:35pm
	It is either a problem with your drive spring or valve. Or you got stuff stuck in the powertube. I would take it apart down to the valve and clean everything out. Use plenty of oil on the valve. Lube up the moving parts (rear bolt, linkage arm, front bolt). Put some more oil into the ASA (where the tank screws in) and fire a bunch of dry shots into a rag. If it STILL has a problem with low velocity, then I would suspect your main drive spring.

LeeE Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 08 July 2006 Location: United Kingdom Status: Offline Points: 6	Post Options Post Reply Quote LeeE Report Post Thanks(0) Quote Reply Posted: 15 October 2006 at 2:37pm
	thanks a lot, i'll try that

UV Halo Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 19 August 2004 Location: United States Status: Offline Points: 229	Post Options Post Reply Quote UV Halo Report Post Thanks(0) Quote Reply Posted: 19 October 2006 at 6:44pm
	Also, you may want to check the output pressure on the tank regulator as it could be a problem with the reg. Any Pro-shop should be able to do that for you or, you can connect that tank to another gun and test fire it.
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