egr problems

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Mar 15, 2009 | 02:40 PM

JaysRanger

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egr problems

ok i just put my 87 f150 back together and dint think to lable the vacuum and its idleing at about 2500....and ill unhook the the iac and it will go down to like 600. but i unhooked the vac from the tree on the intake that went to the to egr which i dont think is right and the idle is back to where it should be

Mar 15, 2009 | 03:40 PM

Conanski

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No that's not right. Vacuum should go to the EVR solenoid near the coil and then the output of that would go to the EGR valve.

Mar 15, 2009 | 03:48 PM

JaysRanger

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does it matter which port on the tree it goes on the the evr? and that would cause it to idle high?

Mar 15, 2009 | 03:51 PM

JaysRanger

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and the other two relays with the evr dont need to be used again do they.. im lost on this lol i just need to know where each needs to go to make it run smooth again thanks

Mar 15, 2009 | 10:01 PM

JaysRanger

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does anyone know where to get a dirgram are can anyone take a few pics of it at the relays by the coil

Mar 15, 2009 | 11:42 PM

Conanski

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Vacuum is vacuum so it doesn't matter where on the intake you connect the EVR. The high idle was likely cause by the fact the EGR valve was being held open by manifold vacuum, it should be closed at idle.

Mar 16, 2009 | 12:56 AM

JaysRanger

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ok well i hooked it up to the evr and then to the egr and it still does the same.. idles really high in till i unplug the iac are take the vacumm hose off for the evr and its not clogger are nothing so maybe a bad evr??

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Mar 16, 2009 | 10:58 AM

Conanski

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From: Ottawa, Ontario

The EVR is electrically connected is it?
Test the TPS, if it's out of range the computer will open the IAC trying to compensate for a probelm that doesn't exist.