Crud/3fe/EGR

[lowtideride]

I am getting the 3fe ready to drop in the 80 series frame. I am desmogging it because it makes things easier/cleaner. I pulled the EGR off the 3fe last night and this is the second one I have taken off. It was filled with nasty goo/carbron crap like the last one I took off.

What is the best method of cleaning the EFI and soon to be capped EGR compents? For how dirty it was in both 3fe's I took apart it would seem that it would have to soak in somthing for a while to loosin the crud up.

Did anyone else have to deal with this?

thanks for the help,
-Al

 

[WHITCHCOCK]

Crud

Al

I just rebuilt my motor and I had time between engine removal and engine arriaval; so I took my time and took the entire intake manifold/throttle body apart. My EGR had crud on it but that was just the starting point for the filth within the intake manifold. $25 bucks for a 7-day boil at the NAPA nasty tank made it all come back clean. Worth every damn penny - I found 1/4'' of crud on the walls of the intake manifold.

 

[lowtideride]

Nice, I will look into doing the same.

 

[WHITCHCOCK]

One other thing replace all the gaskets - hell of a lot easier to get to now than when assembled under the spagetti farm.

 

[lowtideride]

I'll drop c-dan a line and see what gaskets I can get for what... I have rebuilt carbs before but never really touched the EFI til now. So, I am just kinda learning my way around it. If there is a certian list of gaskets I need I guess c-dan would be the man to talk to.

 

[Moby]

I took my intake manifold to the machine shop and had them "warm" tank it. I figured submerging it for a long soak would be easiest and I didn't want to deal with the chemicals. They soaked it overnight and it still took some scrubbing to get everything off. All injectors (including the cold start which was really nasty with carbon) got cleaned and balanced by an injector shop. My throttle body got bored oversized so I didn't have to clean that myself

 

[lowtideride]

I took my intake manifold to the machine shop and had them "warm" tank it. I figured submerging it for a long soak would be easiest and I didn't want to deal with the chemicals. They soaked it overnight and it still took some scrubbing to get everything off. All injectors (including the cold start which was really nasty with carbon) got cleaned and balanced by an injector shop. My throttle body got bored oversized so I didn't have to clean that myself

Was engine preformance much smoother afterwards?

 

[WHITCHCOCK]

Fi

I had all the FI ballanced/tuned whatever they call it and it is more of a peace of mind thing for this engine - more power being very relative with 3fe - I just want to run the beast and not worry about it again.

I figure in the end my 189k no oil in the head motor was down to 120-100 hp - it would barely do 60mph on the flats. Afterwards, she'll pull 65 mph on the flats at 1800-1900 rpm with 33s (checked by gps) and at steady highway miles she's getting 14-16mpg with lots more umph.

But what is causing the improvement? FI? New less restrictive exhaust? Rebuilt motor? Rubber overdrive? Probably a combo of everything.

I have messed with FI on more performance engines (I played with various race cars as part of a mispent youth) and it can make a measurable 2-5% difference on a dyno with slightly better milage - not much but there is some power to be found there, but I'll add the caveat that this was in the late 80s/early 90s and everything has gotten much more sophisticated since then.

 

[WHITCHCOCK]

Engine Gaskets

AL

Check the whole engine rebuild gasket kit - I got mine from Crusierparts - and it was very reasonable $300 sticks in my head and it had every gasket and then some.