RXgirl7

Ok guys, here's the problem. It only happens at the end of the day, after I have been driving hard at the track all day. It only happens during cornering/corner exit, rights, lefts, big long sweepers, short switchbacks, etc. It does not happen on straights. The power just cuts out for a split second, and then comes back on, sort of a short "hiccup".
It's not vacuum in the gas tank, I tried popping the gas cap, makes no difference. The tach doesn't hiccup along with the car, so I don't think it's trail ignition.
The amount of fuel in the gas tank makes no difference either. It was doing it before I removed my airpump/acv and cats, and before I put on my dual exhaust. It only happens at the track, at the end of the day, so I can't just go testing things on the street. I would like some ideas of things that I can test next time I take the car to the track.
I'm thinking it could be the lead ignition crapping out, or maybe the fuel pump...any other ideas??
I searched, and nothing came up that sounded much like what I'm getting. Sorry for the long post, and thanks for the help.

-efini-

Doesnt the tach runn off the lead coil...

Does the car backfire when this happens? or it just hesitates for a split second.
If it was ignition cut, then some unburnt fuel would make its way through the exhuast and probibly combust so you could hear that.

Sounds more like fuel is not making it...my only guess is fuel pump or filter.

Black91n/a

It could be the fuel pump filter sock thingy in the fuel tank, but the sypmtoms aren't the same as the usual symptoms of a bad filter there. Usually with that it's only/mostly on left hand corners. It's easy and cheap to replace though, so I'd suggest starting there, just remember to drain the pressure out of the lines to prevent fuel from spraying everywhere.

kungfuroy

iTrader: (6)

Does the idiot cluster flash on while it 'hiccups'? Also when you are in the corners are you off the throttle for any time?
Check the adjustment of the tps and its sweep.

RXgirl7

The tach runs of the trailing coil, which is why I think it might be the lead. It doesn't backfire at all (that I can hear over the rest of the car noise), the tach doesn't hiccup, and no idiot lights come on (that I saw, I was very busy driving lol). It does it in big long sweepers (foot on the floor for extended periods of time) and switchbacks, gasbrakegasbrakegasbrake etc. So the degree of throttle doesn't seem to have much to do with it.

kungfuroy

iTrader: (6)

time to break out the Multimeter!
I think checking the tps would be good, sort of had the same issue with my car after hard driving.
Then just taking the meter and making sure everythign is in spec.

nice driving yesterday

Phantomhp

Mine did the exact same thing when I first got mine running.

I would take turns it would cut out for a sec or two then catch again once straight.

Replaced the fuel filter (sock) on the fuel pump inside the tank. Haven't had the problem since.

Mike

RXgirl7

thanks

hmm, I'll check the tps, this one is a used replacement for one that crapped out on me. fuel pump is fairly inexpensive, so it won't hurt to change that.

Aaron Cake

iTrader: (1)

Fuel pump sock or fuel tank baffle.

Icemark

This is covered in the FAQ for FC sticky thread found at the top of this, the 2nd gen technical section.

If you had looked there first you would have seen this to be a common problem related to a dirty fuel pump sock.

Always read the FAQ for FC sticky thread before posting. It covers many of the commonly asked questions such as the one this thread was started with.

I should close this thread... you should know better RXgirl7

Boostmaniac

Good thing you didn't close it.

Now would be a great time to upgrade the fuel pump because you are going to be in there anyways.

Icemark

You would not want to upgrade the pump unless you had sufficent other modifications to a non turbo, to support additional fuel.

Just upgrading the pump with no porting or forced induction changes would actually lower power on a non turbo (and a Turbo as well).

RXgirl7

yes, I searched and read the FAQ. I fully understand that the problem is most likely the fuel pump-but-since this only happens at the track, and I do not have the luxury of testing unless I am at the track (which is every few months), I need any idea of what it could be in case it isn't the fuel pump, so I can test every possibility next time I am at the track.

misterstyx69

iTrader: (142)

another Wierd thing that it Could be..Loose battery..It will ground out against the hood..and Thwap!..no Electrical for a Split second(cut-out)..(unless you have relocated battery)..Hell ya never know with these things!..I'm also Leanin towards the Fuel Sock..Good luck though RXgirl7.

Smoken'

iTrader: (1)

The sock is fairly easy to replace, all it is a fuel filter on the bottom of the fuel pump. All you have to do is pull the carpet back to access the fuel pump. The sock will probably cost $5 at your local parts store. I don't see what the big deal is. Get the fuel pump out of there and fix your problem!

RXgirl7

Replacing the fuel pump is a given. That's not the problem. I would just like to know every little shot in the dark that it could possibly be, so that I can bring anything I need to test at the track, etc. Just want to cover all the bases, bc it would REALLY suck if it happened during a race!

Icemark

Electrical in the car would fail then, all the gauges, everything would go dead.

RXgirl7

Also, I should have been more accurate in describing the symptoms of my problem. It does not give the traditional "waan-nah-nah" sputter that usually accompanies a fuel delivery problem, it just goes away and comes right back, always in corners, never on straights.

Phantomhp

I would still go with the fuel pump sock.

When mine was dirty it didn't sputter either. Just lost power then came back cause your not getting proper fuel to begin with if the sock is dirty.

Mike