Noisy engine

[derblazer]

Something I have noticed with my 97 blazer LT is the engine while driving and minor pulling, (hills), seems to have lifter noise, or at least that's what it sounds like, but when I hear my wife drive it,me not in the vehicle, it sounds pretty normal. Am I just being paranoid or is the engine just a little noisy?

[tom3]

Somewhat unusual, but it could be the gas formulation in your area or something. Might also try an oil change and see if you get any improvement.

[BlazerLT]

Detonation. Not good.

changed your fuel filter lately?

[derblazer]

So where is the fuel filter?

[BlazerLT]

Inside of the driver's side frame half way back.

[s10blazerman4x4]

is it cold out and is the engine not warmed up to speed?
i had cylinder detonation on 3 of mine 2 weeks ago by gettin on the gas at the red light with an engine not really warmed up to speed not a cool feeling

[BlazerLT]

detonation is not caused by a cold engine, it is caused by a HOT engine.

[BLaZiNiTuPinDA_L$]

4 real what happen to u was a cold start not a detonation i prob siezed huh

[cobra1]

Originally Posted by BLaZiNiTuPinDA_L$

4 real what happen to u was a cold start not a detonation i prob siezed huh

Should i ask if anyone cares to translate?

[cobra1]

Originally Posted by derblazer

Something I have noticed with my 97 blazer LT is the engine while driving and minor pulling, (hills), seems to have lifter noise, or at least that's what it sounds like, but when I hear my wife drive it,me not in the vehicle, it sounds pretty normal. Am I just being paranoid or is the engine just a little noisy?

what fuel grade are you using?

[BlazerLT]

Originally Posted by cobra1

what fuel grade are you using?

Doesn't matter, the 4.3L is tuned for 87 octane and has knock sensors.

[cobra1]

Originally Posted by BlazerLT

Doesn't matter, the 4.3L is tuned for 87 octane and has knock sensors.

funny, my owners manual tells me 89 minimum, 93 if hauling or towing.


and yes it does matter, if its pinging that hes hearing, then the knock sensors arent doing their job. if using a higher fuel grade eliminates it, then he knows what his problem is.

[BlazerLT]

Oh it does does it?

89 Octane......in a 4.3L......

Please scan that page and post it up here, I would love to see it.

Our engines are made for 87 octane.

[JParrott]

Originally Posted by cobra1

funny, my owners manual tells me 89 minimum, 93 if hauling or towing.


and yes it does matter, if its pinging that hes hearing, then the knock sensors arent doing their job. if using a higher fuel grade eliminates it, then he knows what his problem is.

yeah-you better post a page or link or something. I damn sure know my owners manual says 87 octane (2000 LS).

Really, saying that a blazer would be tuned for anything but the lowest grade available is baloney. It's not a performance vehicle. It was made for the masses who slave for a dime and aren't going to be affording $2+ for 93.

[BlazerLT]

Yea, true, this is not caused by low octane fuel because our trucks are made for 87 octane seeing it has knock sensors and timing retard.

I think in this case there isn't enough fuel pressure or maybe even the fuel filter is clogged and isn't allowing enough fuel to get to the engine.