Extremely sludgy carb/intake manifold

[4geze63]

MY car has high miles and when I got the car back in february I removed all the intake pipes to inspect and whatnot. and notice that whole intake was extremly oily which led me to believe that in TB and intake manifold wuld be the same, I rerounted the breather hose so it will no longer deposite oil.

My question is, is it notmal to have asmuch build-up as I do, I mean iff you run you finger inside the intake manifold you get a pretty good acumulation of sludge. anyways Im going to use seafoam and carb cleaner to get everything totally cleraned out.

The intake was prolly never cleaned on my car, I cant wait to see how it imporves its preformance and idle.

and lastly can I use seafoam/carb cleaner moretimes then once if it looks like it would still need it?

 

[DSMeclipse4G63]

My 95 dsm was like that when I cleaned and replaced the pipes about 1 1/2 years ago. The breather tube actaully doenst have a breather and just dumps oil from the head. I wouldnt recomend just disconnecting it and letting it hang, go to autzone or advanced auto and buy a clear fuel filter for an old GM(about $2 with tax) and put it inline with the breather tube and the intake. I did and all my pipes are clean without a drop of oil after 1 1/2 years and all you have to do is replace it every 3 oil changes.
Andrew

 

[steve]

Besides the blowby oil that winds up in the intake, the EGR enters the intake right next to the throttle body and that doesn't help. You can use as much seafoam/card cleaner as it takes but it can only reach so far. If you really want it clean you'll have to take it off to get at the lower parts of the runners. Not that it should really make a huge difference. Just make sure your throttle body is clean. You might want to pull the BISS and ISC to clean their passages too.

I'd suggest checking the TB shaft seals for leaking but I don't know what to tell you to replace them with if they were, since the '90 has at least one different sized seal than the later cars.

Steve

 

[Tallen]

Regular treatments of Seafoam or MCCC should do the job.

 

[4geze63]

I took the TB off and thourouly cleaned it, after cleaning it my idle increase to 2000rpm,

Tomorrow I am going to ground out the TPS and set the idle back to 900

 

[steve]

Tomorrow I am going to ground out the TPS and set the idle back to 900

You going to do what? Why would you ground out the TPS? You ground the timing check and pin 10 on the diag connector to adjust the BISS for setting the base idle speed
Unless you have removed the ISC (or it's dead), modified the ECU, or running a standalone you should be setting the idle speed to 750.

Steve

 

[4geze63]

I ment ignition timing plug,... i was sorta drunk when i wrote it