Fuel Power and the "octane boost" effect (Terry or Molakule?)

[rob-the-oil-nut]

quote:

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Originally posted by GT Mike:

quote:

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Originally posted by hannaco:

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The '96 and '01 engines in that car (3800 Series II V6 RPO L36) are identical, and the knock sensors are the same as well. The only differences in these engines was in the design of the throttle body/MAF sensor, and the fuel injectors, but those would have had to be swapped from the original engine, as the wiring harness plugins are totally different. [/QB]

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There seems to be a difference regarding the distance between where you spin-on the oil filter, and the oil pan. Did you read that post? It was smashed with a hammer to make room for a PF-47-C rather than what SHOULD fit.
BTW what's RPO L36?
THANKS!
RTON

 

[GT Mike]

There were two different styles of oil filter adaptors on the 3800 engine, depending on what it was installed in. In a Grand Prix, Regal, etc. (W-body) it hangs out on the right rear of the engine behind the harmonic balancer. On the Bonneville, Eighty-Eight, LeSabre, etc. (H-body), it's tucked up on the inside of the cradle by the oil pan. I never looked to see if just the adaptor is removeable, or if it's integral in to the front cover.

L36 is the GM Regular Production Option code for the 3800 naturally aspirated engine. L67 is the supercharged version. That's the way we differentiate the two engines on ClubGP.

 

[T-Keith]

quote:

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Originally posted by GT Mike:

quote:

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Originally posted by hannaco:
The '96 Bonneville with a 2001 or 2002 Le Sabre engine may not have a knock sensor that the ECU understands.

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The '96 and '01 engines in that car (3800 Series II V6 RPO L36) are identical, and the knock sensors are the same as well. The only differences in these engines was in the design of the throttle body/MAF sensor, and the fuel injectors, but those would have had to be swapped from the original engine, as the wiring harness plugins are totally different.

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Actually I believe there was a knock sensor change in 99 as well.

Did this mechanic just drop in the engine without changing any sensors? If so, there would be quite a bit wrong here.

-T

 

[rob-the-oil-nut]

quote:

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Did this mechanic just drop in the engine without changing any sensors? If so, there would be quite a bit wrong here.

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Good heavens, I should have my own thread on this car. Good news is that a used, but personally inspected oil pan has been found, they just want to book a techie. It HAS already had a look-at by a GM certified mechanic that doesn't work at a GM dealership. After the new pan is in, he'll look at it again, and I hope give it a good road test. That sort-of-knock sound bugs me, I would love to know what is up with that.
If the sensors were done wrong, what symptoms should I be on the lookout for? Gas mileage and drivability are fine!
THANKS!
Rob

 

[T-Keith]

I don't think you'll be able to do much, other than checking part numbers.

The first thing would be to verify the throttle body, as this is a very likely cause of your problem.

99+ thottle body is on the left 96-98 TB is on the right.

-T

 

[mechtech]

A knock sensor is constantly in communication with your car's ECU [sends a signal only when a knock is perceived, though]. Eventually, after time, you computer will back off it's settings if it receives a lot of knocks in certain conditions. It relearns as you drive.
It can only advance the timing to it's pre-set parameters - there is only so much available. But it CAN work it's way down the advance ladder.