Odd sounds.

[the baPhoon]

Ok, heres the story.
I took my girlfriend out for a ride in the Ty after finally getting my turbo to run full boost. I started my ty, let it warm up and i was off. Got into boost down a side street and all was well. I then hit a little boost (around 2-3 psi) and i get an odd sound from somewhere in the front of the truck. It sounds like trying to start a 2.8 GMC Gypsy off in 3rd gear with a manual tans, that little rattle sound. SO this has left me thinking. Im wondering if perhaps my turbine may be contacting the turbo housing at lower boost levels. Im gona pull all the air tubes off tomorrow and check the turbine for any play/signs of turbine to housing contact. Any info on this nice rattling noise is GREATLY appriciated :tup:

 

[Robert Lone]

Re: Odd sounds.

Detonation?

 

[MadPSI]

Re: Odd sounds.

Could be engine knock with how friggen hot it is here, but there are many more probable reasons for the noise...

When's the last time you've changed spark plugs? I know you just got the truck, but if you still have the plugs the owner had in it, then that might be an issue. These trucks like to eat plugs. I change mine at least every couple months of use. More frequently if I race it.

Could also be some good-ole intercooler heat soak. In our heat, the intercooler works as it should the first time you give it the beans, then after that it's useless. The water gets too hot and actually increases the intake temperature, thus making the motor more prone to detonation. Your stock intercooler pump (located just behind your water cooler [looks like a mini-radiator under your front bumper]) may not be working. Even if it is working, it doesn't do a good job in the AZ heat. You can opt to replace it with a larger pump (a ShurFlo RV toilet pump) which flows a lot more water, but I've found that even that doesn't get the job done.

You have two options at that point. Either go with an alky injection setup (which has been very successful in many AZ trucks) or go with a front-mount intercooler. The best solution is to do both, of course. I, personally use an A2A IC with methanol injection...

 

[the baPhoon]

Re: Odd sounds.

Yeah i got into something yesterday which kept me from hotwiring the damn IC. Ill get that done today. Gona pull off the air hose anyway to check the condition of the turbine just to put my mind at ease. I notice it does make the noise normally after it heats up a bit. Thanks for the help guys, and keep up the good work.