I am on my 3rd. buick supercharged motor (all different years) they all have motor knock under load, gas milage is good, no oil burning. put 60,000 klix on last one.anybody else have similar problem?
Are you using (or have you tried using) premium fuel in it?
Wife had a GM product years ago that I mistakenly put regular into ...... holy crap did that thing knock and clang IMMEDIATELY after pulling out of the gas station (she always ran premium in it). I headed straight for Canadian Tire, bought some sort of fuel treatment (can't remember what, I may have even bought two kinds and poured them both in ), and the noise was gone. I never made the mistake of putting regular fuel in it again
When I said I was on my 3rd. 3.8 supercharged I meant 3 different years and cars 1993/1997/2005 all purchased with less than 150,000 km. ALLWAYS use shell 91 grade, never,never use ANY grade of Petrocan,my 97 was ruined the first and only time I filled up there,cost me almost 2,000.00 in repairs. as a point of interest I get 4.9 lit/100km. Sherlock.
When I said I was on my 3rd. 3.8 supercharged I meant 3 different years and cars 1993/1997/2005 all purchased with less than 150,000 km. ALLWAYS use shell 91 grade, never,never use ANY grade of Petrocan,my 97 was ruined the first and only time I filled up there,cost me almost 2,000.00 in repairs. as a point of interest I get 4.9 lit/100km. Sherlock.
When I said I was on my 3rd. 3.8 supercharged I meant 3 different years and cars 1993/1997/2005 all purchased with less than 150,000 km. ALLWAYS use shell 91 grade, never,never use ANY grade of Petrocan,my 97 was ruined the first and only time I filled up there,cost me almost 2,000.00 in repairs. as a point of interest I get 4.9 lit/100km. Sherlock.
toomuchjunk wrote:
57.6 MPG WOW you must have a real light foot!!
A real light foot and turning the engine off on hills
AS mentioned Timing chain tensioners wear out, slapping chain?
Also if it has a knock sensor check the torque, a loose one will require more bang to reduce timing. Torque tighter and it will be more sensitive.
Not S/C bearings/gear play?
Ya they are amazing engines. (considering the year of design) kicks jap ass, for the price and technology.
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Fords Rule ! If it ain't designed and manufactured in North America it sucks ! I don't do rice, pasta, fish and chips, sauerkraut, Ikea or other third world motor vehicle !
Never, never use ANY grade of Petrocan. My 97 was ruined the first and only time I filled up there,cost me almost 2,000.00 in repairs
Any chance you could give more details on this?
I buy (and have always bought) from whatever gas station is close and open (when I need fuel), including Petro, and have never ruined an engine due to my gas purchase. As a matter of fact, I've never even heard of this before. What's the story?
Never, never use ANY grade of Petrocan. My 97 was ruined the first and only time I filled up there,cost me almost 2,000.00 in repairs
Any chance you could give more details on this?
I buy (and have always bought) from whatever gas station is close and open (when I need fuel), including Petro, and have never ruined an engine due to my gas purchase. As a matter of fact, I've never even heard of this before. What's the story?
57 MPG? engine ruined after one fill up at Petrocan ? I'm eagerly waiting for his reply.
To Chips,regarding bad gas at petrocan,a friend gave me a discount card for that brand and the first fill-up the car started to run rough the next day like it had water in fuel so dumped in small bottle of de icer,end of week still running ROUGH so filled up at same station,next day car would not even start,plugs were soaked with gas,cleaned them. still no start so pulled out fuel pres. regulator and it was plugged with sand.ended up replacing fuel pump, injectors fuel filter and blowing out lines etc.car then ran as before I used that station. weird thing is gas co. claims no body else had problems.They checked tanks at station about 3 weeks after I complained! I think average joe has no idea why his car quits and when it does goes to garage and they fix problem without trying to find what caused problem. As to my gas mileage in 2014 put 6721 km. on buick and used 1578.054 lit.fuel my calculations equal 4.259043 lit./100 km. Sherlock.
), and the noise was gone. I never made the mistake of putting regular fuel in it again 
