Potential of engine damage from lean fuel mixture or no fuel
Potential of engine damage from lean fuel mixture or no fuel
(OP)
I've got a circumstance where there is an issue with a hole being burned through a piston on the #5 cylinder (driver front hole) of a 1998 Jaguar XJR supercharged vehicle. Some of the claims are that there is no fuel being delivered, which would set a fault code, some more logical ideas are that there is a lousy spray pattern with the injector and it's a lean spray. Any really smart input would be greatly appreciated.





RE: Potential of engine damage from lean fuel mixture or no fuel
Rod
RE: Potential of engine damage from lean fuel mixture or no fuel
RE: Potential of engine damage from lean fuel mixture or no fuel
Regards
Pat
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RE: Potential of engine damage from lean fuel mixture or no fuel
The story gets too lengthy on how I learned about failure to speedily replace non firing spark plugs.
Seems one side of the "smart box brain." thinks the non burned fuel in my 95 Ford Windstar, 3.8 L, V6, need more air and the other side detecting more air, decides to sends more fuel.
When conditions get to some point, the Catalytic Converter ignites, with flames coming out of the connection joint. Usually, the Catalytic Converter requires replacement. Sometimes the automobile will burn up.
At 74th year working on IR-One PhD from UHK - - -
RE: Potential of engine damage from lean fuel mixture or no fuel
RE: Potential of engine damage from lean fuel mixture or no fuel
then again, it's been a month since anyone posted... maybe my memory is just getting bad. oh wait, no, it really does say that right up there in the january posts.
hey, thanks for clearing things up though.
RE: Potential of engine damage from lean fuel mixture or no fuel
Rod
RE: Potential of engine damage from lean fuel mixture or no fuel
It is a nice little tool and if you are into building high hp engines and you use a MS system or a programmer then it should find it's way into the top drawer of you toolbox!
About the lean no fuel issue think about that caddy motor that cuts off 4 cylinders when cruising.
RE: Potential of engine damage from lean fuel mixture or no fuel
Yes, Mildred. I did try "ColorTune" when I was a kid. It was cute. At the time I thought it great, but by and large, time and experience has proven it pretty much useless in tuning a high output engine. Great for my MG-TD, though! Using EGT probes and gas analyzers is much faster and much more efficient. If you know how to "read" a plug (trust me, most techs DO NOT) gimmicks like ColorTune are redundant, if not superfluous.
Rod
RE: Potential of engine damage from lean fuel mixture or no fuel
RE: Potential of engine damage from lean fuel mixture or no fuel
Keep in mind that my wife drove race cars when we were first married in 1962. She's a red headed Irish lass with a lead foot, even today! I have no idea what she was actually doing (don't tell her I said that). She says she was "just driving along in the fast lane and it started making noise and smoking"! ???
Rod