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Anyone familiar with the 20v 4age? Where is the vac leak!
Last Post 09-18-2011 07:15 AM by jere. 1 Replies.
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sirnixalotUser is Offline
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Nikko

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09-14-2011 03:52 PM  

 I recently swapped in an AE101 silvertop, automatic transmission and full engine/chassis harness into an EE103 corolla wagon.  No splicing of any harness as i swapped all wires from head light to tail light.

Everything ran fine before the swap, alas now not so much.

During the swap one of the bolts securing the hook for lifting the engine by the distributor broke so it swiveled up and snapped off part of the vacuum chamber on the top near the injectors. I swapped on a spare one from a black top that i had. It also dented the inlet to the plenum which i hammered back into shape.

I have taken the throttle bodies off, blocked off the evap, power steering and ac idle up lines and changed all the vacuum hoses to new ones.

The engine will start reluctantly and idle at around 1100rpm. If i open the throttle it will stumble and die out UNLESS i move the AFM signal arm thing (sorry for lack of technical term) manually.  I have tried a Toyota Windom AFM (same thing as the Camry) to rule out the stock AFM and both result in the same engine behaviour. 

Before i swapped the motor if i removed the oil cap while the engine was running it died (from the unmetered air). Now when i do that the engine keeps running so there is a leak i just don't know where (i cant see where it would be leaking from the crank case). The odd thing is if i disconnect the hose going to the pcv valve the engine dies right away.

I do not see any obvious cracks in the plenum nor the valve cover.

Unplugging the electrical connection to the ISCV does nothing. I have not yet tried blocking off the ISCV hoses.

 

Thanks for any pointers or insight!

jereUser is Offline
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jere

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09-18-2011 07:15 AM  
I am not familiar with that motor, but I would check the O2 the TPS and the sensor that measures the incoming air and make sure they are all working properly with a volt-o-meter thing before anything else.

Then I suggest you make a boost leak detector like turbo guys use (air compressor or re purposed garden sprayer). Basically just cap off the intake and pressurize the intake and listen and feel for leaks.
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