tick tick tick

[RUQUKNF]

Just bought a TY(very excited) and a couple of things wrong. ONE- tranny bad but thats ok(putting a 400).TWO- i think it's a lifter making the noise but not sure, hoping it might be a common noise from something else, but if it is the lifter are there any tricks to maybe fix it????

 

[DanenGraham]

Could be the injectors, they can be very loud. When you rev the motor, does the sound get louder or just speed up? If it is a lifter it should get louder, where the inj. just speed up. (I think thats right, could be wrong) I can hear my inj's in side the cab of my truck. you can feel the fuel rail also and feel if the sound is happening at the same time the you hear the sound.

 

[Captain Morgan]

Hi, and congrats on your purchase.

1. the ticking you hear could just be the normal fuel injector tick that is very common and sometimes quite loud on these trucks.

2. It is possible its a rocker or a lifter, how many miles on the truck/engine? My truck had a slight rocker tick when I bought it, but its never caused me any trouble.

3. Where are you located? Having other owners in your area is usually quite helpful.

 

[InvisiBill]

I am in no way a car/engine expert, but the Sy is my second 4.3L S-truck. The injectors are quite loud. It's often described as a "sewing machine" sort of sound, if that helps at all.

 

[RUQUKNF]

thanks

thanks

it was the injectors(thank G*D), but I have another question-OVER BOOSTING-I always here about it with these trucks, how does this happen? is it because the the trannys slip or what? Thanks again (very exited)

 

[Captain Morgan]

Re: thanks

Re: thanks

it was the injectors(thank G*D), but I have another question-OVER BOOSTING-I always here about it with these trucks, how does this happen? is it because the the trannys slip or what? Thanks again (very exited)

overboosting happens cause the stock chip is calibrated to only read up to 14.7 psi. GM/PAS or whoever, programed the chip to basically "shut down" if 14.7 psi was exceeded cause for the normal joe who buys one, if things arent running the way they should be, high boost pressure can do bad stuff to your motor, so basically its a safety precaution. Most aftermarket chips resolve this low overboost problem, just make sure you stay away from the Kenne Bell chips.

If you do experience overboost, the truck will basically die for a few second, then go back to normal. A few seconds later, the Check Engine light will come on then go off about 10 seconds later. You will now have a code 31 stored in your ECM, but it will not change or harm anything.

Common causes of overboost are: removal of cat and/or improperly adjusted wastegate rod

 

[InvisiBill]

Re: thanks

Re: thanks

Common causes of overboost are: removal of cat and/or improperly adjusted wastegate rod

To expand on this, the stock integral wastegate is pretty close to being inadequate. If you remove exhaust stuff like the cat, it reduces backpressure and increases exhaust flow. This is normally a good thing, but the wastegate is still flowing the same amount (due to the path the exhaust gases have to take out of the wastegate). You now have the same amount of control but with more exhaust flow. Some people have said they removed the cat and didn't have any problems, but most people end up with lots of overboost.

 

[JSM]

ONE- tranny bad but thats ok(putting a 400).

Wondering why you are going this route, for what appears to be a stock truck, or close to it?

 

[RUQUKNF]

ONE- tranny bad but thats ok(putting a 400).

Wondering why you are going this route, for what appears to be a stock truck, or close to it?

I might stick with the 700 now because I found a guy in Vegas that specializes in them, but the reason I was going to swith it is because of all the bad things I here about them and I have a 400 w/stall just waiting for something. A few months back I read about a guy doing the conversion threw Rossler Trans and was happy as hell (on this forum) so still strongly debating.

I guessed since the tranny would slip and the motor would rev faster without going anywhere was over boosting, then I happend to be on Turbo Buick and they were talking about it(actuators and waste gate probems), thanks for the info I will look into that.

 

[DanenGraham]

Does the truck have a cat on it?

If not that could be why its overBing.