Poor MPG on a'95 Buick

[TrickyTransAm]

Dad Wired It??? It should have been plug and play. Are you saying he spliced sensor/pcm wires?

You may also want him to check the sensor ground wire, on the back of the block, above the oil pressure sending unit. It commonly broke/rotted off, but may be part of the issue, as well as the knock sensor wires or knock sensor itself.
Throwing any codes?

[TrickyTransAm]

Yep - exactly what he said.
I have a friend with a '95 Olds 88, and the first term at school, we hydro locked it after dynoing it then proceeding to drag race it against my car twice on Bluff street.
Long story short, replaced lower intake gaskets with the new style - hydro locked it again, and found out the upper intake caused the problem. Replaced that with the new design (complete with new EGR stove pipe) and he says it's never run better!

How long ago was that? Usually the motor doesn't last long after that. When We hydrolocked our first engine, the rods were slightly bent as was the flywheel, and starter toast.
Not to mention the oil steam cleaning the bearings and crank got. Dealer replaced gaskets as "We only fix whats broke" - engine spat a rod 13K miles later.
I have photos of it in my msn spaces page in my signature. Its under "3800" You can see the pieces of whats left.

With the 3800 Series II engine, your best bet is to change the lower gaskets and upper intake before 50K miles, as that's when the gaskets crap out.
Those who run longer are on borrowed time. This is one time where "if it aint broke dont fix it" does NOT apply.
There is no reason why the series II 3800 shouldn't run until 300K miles if that problem is corrected before its too late.
Ive got a pictorial guide I put together if anybody needs it from start to finish for FWD cars. RWD would be similar, but obviously intakes are different.

[MP81]

How long ago was that? Usually the motor doesn't last long after that. When We hydrolocked our first engine, the rods were slightly bent as was the flywheel, and starter toast.
Not to mention the oil steam cleaning the bearings and crank got. Dealer replaced gaskets as "We only fix whats broke" - engine spat a rod 13K miles later.
I have photos of it in my msn spaces page in my signature. Its under "3800" You can see the pieces of whats left.

With the 3800 Series II engine, your best bet is to change the lower gaskets and upper intake before 50K miles, as that's when the gaskets crap out.
Those who run longer are on borrowed time. This is one time where "if it aint broke dont fix it" does NOT apply.
There is no reason why the series II 3800 shouldn't run until 300K miles if that problem is corrected before its too late.
Ive got a pictorial guide I put together if anybody needs it from start to finish for FWD cars. RWD would be similar, but obviously intakes are different.

Umm...probably one and a half years. Haha.

He turned it off before it locked, is what we determined.

[jetice]

It wasn't a simple resistor, it was a potentiometer. He put it in right before the pcm in-line because we thought there might still be something wrong inside the wires. And I asked him the other day and he said it was on the knock sensor, not the O2. We replaced the O2's a while ago, but now it occasionally throws a HO2S Lean Reading. I looked at the lean/rich graph on our Solus and it just stays lean unless you hold/tap the throttle, then it reads rich. When you let off it goes right back to lean.
My dad was looking at the scanner the other day at idle and said that the Fuel Trim(?) Counts look a little high also.

[jetice]

EDIT: Hit post and it didn't come up, so i re-posted.