markoside

Does any one have instructions for removing the throttle body and or intake manifold for a '97 SC300. I think my EGR intake ports are clogged and need to be cleaned out.

Thanks a ton.

stevegrizz

Its pretty self explanatory-
1- pull off intake pipe
2-loosen tb bolts so it can move slightly
3-remove all the stuff keeping it from sliding off sensors/coolant lines/egr/cables
4-remove the intake

markoside

Thanks Steve. Will that give me access to clean out the EGR intake holes?

stevegrizz

pretty sure egr is connected right to the tb...

having said that- why do you think it need to be cleaned out; what symptoms do you have?

markoside

I have a P0401. Replaced EGR and hoses. When I pull a vacuum on the EGR, the engine does not stall. Per Scotty Kilmer, on the 4 cylinder honda / Acuras the EGR holes inside the intake manifold get clogged and block EGR vacuum. Living in CA, need to get the check engine light off.

stevegrizz

I had the same code and it was fixed by replacing the egr vacuum modulator-

do a search on here or google and you'll find the way to test both system (egr valve and vacuum modulator)

if it does turn out to be the modulator, you can get a cheap one from autozone if you aask for the camry part instead of the lexus one

markoside

Yep. Already tested it. When you pull a vacuum on the EGR, it should make the engine stall. It does not, so I replaced the EGR. Still does not stall the engine. My best guess it that the ports are clogged, i.e. EGR opens, but the ports do not allow vacuum from intake to pull in EGR gases.

stevegrizz

Im telling you check the modulator- i had same symptoms- 25$ part and ten mins of work; just have to diagnose it. Pulling the vacuum off only tells you that there is an issue with the whole system, not which specific part.