[JeepItUP]

1.Ok sounds like an exhaust leak, and faint smell after idling in cab of exhaust fumes. But when idling i cant hear the clicking noise, only happens it i get into the trouble hard. But slow acceleration it doesnt make the sound. Is it exhaust, and if so how hard is it to change gasket. I tightened the bolts already and everything was tight, cant see any visible opening alone the piping.


2. Previous owner said i would need to put a new fuel injector soon. I am not sure why but im guessing its never been replaced. 157,XXX miles. Does it need replacing, or what? Also my other question, is the injector inside the Carb/TBI unit.

[jgillespie]

i had a similar problem a year ago. i had exhaust coming into the cab through the dash vents for the defroster. it ended up being a bad head gasket.

to change the gasket, it should not be a difficult task whether it is the head gasket or exhaust manifold. you will, however, need to get a new set of bolts for either place you change a gasket (they say you should change the bolts each time so they will keep their tightness after being torqued down.)

good luck

[jgillespie]

don't know about the fuel injector. but unless its a custom setup, yj's didnt have fuel injection until 1991

[JeepItUP]

Originally Posted by jgillespie88

don't know about the fuel injector. but unless its a custom setup, yj's didnt have fuel injection until 1991

What i have learned from my book is that 2.5 L have a throttle body injection system(Single Point). Where as the 4.0 L has carb

"The Throttle body fuel injection is used on 1987-1990 wranglers equipped with 2.5L engine and is a pulse time system that uses a single solenoid-type injector to meter fuel into the throttle body above the throttle plate" Section 5-5 Chilton Wrangler/ YJ 1987-1995 Repair Manual

[jeepsurf]

Originally Posted by jgillespie88

don't know about the fuel injector. but unless its a custom setup, yj's didnt have fuel injection until 1991

My 1990 YJ has a single injector in the throttle body.

[jgillespie]

well good, thanks for some new knowledge about the older YJs.

[JeepItUP]

Originally Posted by jgillespie88

well good, thanks for some new knowledge about the older YJs.

No problem!

But i need to figure out where this thing is the picture in the book, i cant tell where the hell it is laugh out loud!

[jgillespie]

look for a copy on the internet of your owner's manual, maybe it would have some more descriptions of the pictures

[bella mia]

Take the air duct off the throttle body and look in the center. that is the injector. The duct hose goes from the air filter box to the TBI, resembles a carb.

[Dutchers]

yeah, like everyone is saying the injector is in the carb, the easiest way would to probably follow the fuel line to the injector. but before i go replacing anything id run some fuel injector cleaner through a tank first (b12 chemtool works awesome) b/c i dont know howd you can foresee a fuel injector failing.....
also if it is an exhaust leak that will cause the rig to run rich b/c of the extra oxygen entering your exhaust system

[JeepItUP]

It doesnt run that much rich, just its an annoying sound.

As for the injector i see what it is now, and that is true i dont know how you could foresee one going bad, how long do the original ones last time its time to replace them?