Last year I had a 3$ hose on a 800$ fuel pump rob me of 2 out of 3 track days at Calabogie.
This place obviously doesn't like me as much a I do it.

Symptoms...
Last session of the day... 37 degC or 99 degF (scorching hot)...
Early in the session the engine power/revs became laborious as of 7k rpm. Took FOREVER to inch it's way to 8k. Felt like was abusing my fathers old Delta 88.
By the end of the session power loss started showing up as of 6k rpm!

Under 6k rpm... All is well.
No check engine. No smoke. No vile noises.

WTF?

Dear Illuminati... Anyone know where to start looking?
Variocam?
Coils?
Plugs?
???.

 

If parked at idle can u maintain a steady 2-2500 rpm or is it hunting up and down? Mike

 

Cats, fuel, plugs and fault codes. I'd start from those.
A lot of other things to look into.

Do you have a durametric?

 

Sounds like its starving for fuel or voltage. Any idea what kind of shape your battery is in? Make sure its bolted down securely and the posts are clean.

Clogged flue injector?

+1 for the Durametric

 

I had the exact same experience last year at Calabogie. For me it was a tank of dirty fuel. It ruined last two sessions at Calabogie and the first couple of sessions at Tremblant (2 days later). I think were we're also others who suffered from bad gas (petrol) the same day at Calabogie. Happened when the station at the corner in town ( forget the name) ran their tank dry. Would like to think that it's not a common occurrence but maybe it is. Hope it is something minor like that. It's a great track - even at 37 degC.

 

That's the only way that I can keep up with Dave tomorrow...

 

Haven't tried yet... but throttle blips seemed ok before I abandoned the car for the night.
Will try this tomorrow morning.

 

I don't have a Durametric either here or at home.
How would Durametric help to diagnose?

How can I tell if cats are bad without swapping out for something else?

 

Steve,
Stinson ran out of fuel and had tanker come in at 10am. I needed fuel at 11 am, and the bad fuel story from last year was in the back of my mind when getting gas there.

If this turns out to be bad gas... I don't know if I will be either relieved or just angry with myself.

Fetched gas in adjacent Town tonite with the hope of clearing this out sometime over the course of the morning. I feel it's a longshot.

 

Hope the car is okay, Dave.. I also got gas there today, so we will see what happens tomorrow..

 

Ever change your fuel filter?

Would also like to hear the bad gas theory. If this was the culprit I'd think it'd manifest itself aT all rpms not just up top.

 

Well... Problem appears to be solved.

With no real options to diagnosing this at the track, I set out with the easiest avenue... to consume the fuel that was in the car and start fresh with gas from another station.

FIXED!

I believe that getting fuel from a station that had just been replenished (stirring up sediments) from the tanker to be the cause. Plenty of other track mates filled up many hours later and had no issues.

By principal, I ended up doing a one hour round trip to get fuel from Shell.

All that's left to do for the next event is to get the fuel filter changed.

Thanks for everyone's insight!!

 

So the sediment was stirred up, it clogged your filter, and when the fuel couldn't get through at a fast enough rate, that's what was causing the limited revs? Is that the conclusion? If that's the case then wouldn't the sediment still be in your filter?

Hey, I'm glad you're not missing any more track days , it just doesn't add up for me.

Have fun, be safe.

 

Happy you solved the problem. I have heard the same thing on other forums... do not go to a gas station that has recently been filled up.

 

Not sure I buy that. Sediment would have to deal with two filters (station and the car). And now? It's solved? Just because the ground is wet does not mean it rained.