Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.
took it out , next day blew a hole in my muffler dnt know how and my fuel gauge is dropping twice as fast , runs rougher , ive been staring at it and it actually stopped for a milly sec like it missfired
I remember you saying you did the inlet manifold gaskets at the same time.
Did you torque the inlet manifold bolts correctly (e.g with a torque wrench), if you do them up with a standard wrench or spanner chances are you will over tighten them and damage the gasket, the car will then run rough as you have created a giant vacuum leak.....I see it far too often with V6's, terrible design those plastic gaskets.
Removing the bellmouth shouldn't cause the issues you are describing.
Introduced in 1995, the Series II is quite a different engine. Although the stroke for the 3.8 L engine remained at 3.4 in (86 mm), and the bore remained at 3.8 in (97 mm), the engine architecture was vastly changed. The piston connecting rods were 1 in (25 mm) shorter, so the crankshaft was redesigned. A new intake manifold improved breathing, and a new cylinder head had larger valves. The result was 205 hp (153 kW) and 230 ft.lbf (312 Nm), better fuel economy, and 26 lb (12 kg) lighter overall weight.
The 3800 Series II was on the Ward's 10 Best Engines list for 1995 through 1997.
[edit]L36
The L36 was the first Series II version of the 3800. It has a 96.52 mm bore and 86.36 mm stroke for 3.8 L (3791 cc) of displacement. Power is 205 hp (153 kW) and torque is 230 ft.lbf (312 Nm). It was first introduced in 1995.
This engine is or was used in the following vehicles:
Buick Park Avenue
Buick Le Sabre
Buick Regal
Buick Riviera
Chevrolet Camaro
Chevrolet Impala
Chevrolet Lumina LTZ
Chevrolet Monte Carlo
Pontiac Bonneville
Pontiac Firebird
Pontiac Grand Prix
Oldsmobile Delta 88
Oldsmobile Intrigue
Oldsmobile LSS
Holden Commodore[/QUOT
Make sure you take note of the dates on these threads - it's considered poor forum etiquette to dig up old threads. Especially for no good reason....where did u get these stats from?? Coz every mag, book, manual & everything ive ever read, all says quite different : VN = 125kw VP = 127kw VR = 130kw VS = 147kw L67 = 171kw 5.0 VN-VS = 165kw VS s3 = 168kw bar SS & HSV