Sorry if I interpret as clinging or pinging? Well, I just noticed this morning when I start my truck that make unusual sound (for me), and also when I'm on uphill (55mph) makes that noise but not everytime. Is this normal for 91perf tune by Xcal? Your info. will be highly appreciated. But aside from that the truck tune was great Thanks to you Mike(TP)

 

I run a 93 Perf and notice nothing like you are describing.

 

If it is a timing ping, do not drive it with that. Go back to stock or try some 93 octane.

 

Okay - I'll say this first: the best way to obtain tech support from TP is to contact them directly.

Now - just for giggles.. has anything changed? Fuel, mods, etc? Throwing any codes? And did you datalog your truck yet, as per instructions?

Cheers
Grog

 

Sounds like pinging to me. Try a different brand of gas or go to 93 octane. I remember someone else saying they had that happen and was recommended to try another brand of gas. That they may have gotten some bad gas. Also call Troy.

 

I agree, sound like low quality fuel to me, call Mike anyway just to be on the safe side....

 

Ask yourself,did anyone else drive the truck and fill her up with 87 octane?
I agree with the fill her up with 93 oct. and see or hear if there is a change in engine sound.A ping is not a good thing.

 

Sounds like something new is up, as that has not been reported to us before by this gentleman. And unfortunately, the datalogging he did was incomplete, no data at all from the powertrain only a pull on a dyno with a *very* safe A/F ratio - so we do not have what we need to make any changes. And I suspect something is needed, or that the dyno pull was not done correctly,as the power peaked at just 4200 rpm and that is nowhere near correct - it's a stock truck with nothing on it but our tuning as of the time we tuned it, and it should have peaked it's power at 4700 rpm, not just 4200 rpm. This kind of plot tends to indicate a fuel quality problem - or can be seen when people run say, 91-93 octane on their 87 octane tuning, for example.

And by the way - no, the engine is NOT going to detonate (ping) just starting it up - whatever sounds it's making at startup is not going to be detonation.

Aside from making sure the right fuel octane level is always in the tank (because you HAVE to run the low octane fuel out until the low fuel light comes on before you can fill it up with premium and then change to a premium gas tune), I would also look at things like catalytic converter heat shields vibrating, etc., before I would be looking at detonation - especially given the vast amount of retard capability in the knock sensor system, audible detonation is not very likely.

However, this vehicle does need to be properly datalogged, as peaking it's power at 4200 rpm is not correct for a 5.4 3V engine - it should have peaked at least 500 rpm higher, which makes me think we have a technique problem on the dyno, or more likely, the truck was running the wrong fuel for the tune installed. And this can happen, as we just had another customer who actually had 87 in the tank from an improperly filled gas station - the operator at the station actually had 87 octane in the premium gas tank - now that is a beyond-rare scenario of course, but we have seen that happen a couple of times - and with a power peak of only 4200 rpm, *something* is up here, and thus I would return back to the stock tune, run as much fuel as possible out of that tank shy of running it completely out of fuel, fill it up with good quality premium at a different gas station, and then reinstall the premium gas tuning and see what's up.

The bottom line is, this will not be solved here, as alawys, the only way to get proper Tech Support is ny callling us.

 

Thanks! But as of today I haven't found some Chassis Dyno Lab here at our area the last Dyno Lab I used was closed and I found out their are more on motorcycle expertise. And about the gas (quality) I'm pretty sure that it was 91 Octane by 76. And I'm the sole user of this truck. I just called before for one mistake I did that I just fill a 89 Octane to 87 Perf Tun, but that was long time age. Anyway, I will try to call you, just having these problem with time schedule. Pacific versus Eastern.

 

OK, I look forward to talking with you about this!