LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Do you guys know what plug are these for?

Old 11-06-2006, 05:52 PM
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Default Do you guys know what plug are these for?

Do you guys know what plug are these for? and do I need it? Im not running any of the emmission stuff anymore.




Old 11-06-2006, 06:02 PM
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ok the top pic is for the EGR
Old 11-06-2006, 06:08 PM
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OK the top pic is for the egr solenoid.the second one is for the the evap purge --if i remember correctly, and the third I DONT know cus i have a 94 -- but it looks to be emmissions related. (since its right over the air pump)

i just installed the some longtubes on my car and i dumped the egr stuff. as far as the Evap Purge solenoid. thing. dont -just leave it, and it does performance anywayz , (it only vents on partial throttle in drive) but under WOT, pcm stops modulating it, so it stops pumping fumes into the intake manifold.
Old 11-07-2006, 08:20 AM
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The third one is definitely for the AIR system... Some sort of control solenoid. Ive removed all of that from my motor except the stuff for the EVAP system. But thats going too, along with all its associated parts in favor of a rollover/vent valve on my sumped tank.


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