idle,throttle question

89lx4life · November 4th, 2009, 03:06 PM

had a poor idle, put new 02s in cuz mine were bad cleared it up but still is loading up bad and sounds like the egr valve is bad cuz the valve not opening up its bucking on throttle and wot and not when deceleration and smells like carbon building up any ideas is it the egr most likely ? or maybe iac? not exactly sure just wanted some ideas thanks

flyin ryan · November 4th, 2009, 03:19 PM

egr is only functioning when in cruise condition.. you can simply unplug the wiring harness from the egr if you want it disabled. If you have a cracked or uncapped vacuum line to it that's a different story because then you'll have a vacuum leak.

Does the car have stock injectors and maf?

89lx4life · November 4th, 2009, 04:34 PM

yup stock 19s and maf

89lx4life · November 4th, 2009, 04:37 PM

i thought the egr like recycled gas in to the intake ? because it smells like its not because it cant open up because its getting loaded up so much

flyin ryan · November 4th, 2009, 04:50 PM

Originally Posted by 89lx4life

i thought the egr like recycled gas in to the intake ? because it smells like its not because it cant open up because its getting loaded up so much

no egr is basically for smog and has slight effect on mpg. I'll post a link explaining what it does exactly and why but the short short version is it recycles spent gases back into the intake track with the clean air to reduction the amount of smog out put.

EGR Systems - how it works

And in our cars it's only active during cruising so at idle or wot it's not active and wouldn't cause problem. Only time I could see if causing a problem would be if it was stuck open which would result in a vacuum leak but your check engine light would be on with an error code stored and you'd have shitty idle.

Have you looked for error codes yet? is your check engine light on or does it come on at all during this?

89lx4life · November 4th, 2009, 05:03 PM

okay, so its prob a vacuum leak would the leak cause the bucking that im getting ? cuz thats when im gettin it when im cruising really, havent looked for codes and yeah it comes on and off during it, my idle is shit right now its like 500 and on a cold start it wont keep i have to rev it for a little while

flyin ryan · November 4th, 2009, 05:14 PM

DIY KOEO/KOER/Cylinder Balance Self-Test Procedure

Save yourself some money and time by first pulling the error codes.

89lx4life · November 4th, 2009, 05:16 PM

k codes it is, thanks

November 4th, 2009, 03:06 PM	#1
89lx4life Newbie 1989 Mustang LX Join Date: Nov 2009 Location: Hagerstown, MD Posts: 19	idle,throttle question had a poor idle, put new 02s in cuz mine were bad cleared it up but still is loading up bad and sounds like the egr valve is bad cuz the valve not opening up its bucking on throttle and wot and not when deceleration and smells like carbon building up any ideas is it the egr most likely ? or maybe iac? not exactly sure just wanted some ideas thanks

November 4th, 2009, 03:19 PM	#2
flyin ryan Hardcore Enthusiast Join Date: Jun 2008 Location: NJ Posts: 1,175	egr is only functioning when in cruise condition.. you can simply unplug the wiring harness from the egr if you want it disabled. If you have a cracked or uncapped vacuum line to it that's a different story because then you'll have a vacuum leak. Does the car have stock injectors and maf? __________________ 91 gmc syclone - not stock, money maker 90 lx - turbo, bolts ons etc 88 lx hatch - tons of bolt ons and daily driven 02 zx12r - dyno'd 197 to the wheel http://i44.tinypic.com/2qlws5c.jpg

November 4th, 2009, 05:14 PM	#7
flyin ryan Hardcore Enthusiast Join Date: Jun 2008 Location: NJ Posts: 1,175	DIY KOEO/KOER/Cylinder Balance Self-Test Procedure Save yourself some money and time by first pulling the error codes. __________________ 91 gmc syclone - not stock, money maker 90 lx - turbo, bolts ons etc 88 lx hatch - tons of bolt ons and daily driven 02 zx12r - dyno'd 197 to the wheel http://i44.tinypic.com/2qlws5c.jpg

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November 4th, 2009, 04:34 PM	#3
89lx4life Newbie 1989 Mustang LX Join Date: Nov 2009 Location: Hagerstown, MD Posts: 19	yup stock 19s and maf

November 4th, 2009, 04:37 PM	#4
89lx4life Newbie 1989 Mustang LX Join Date: Nov 2009 Location: Hagerstown, MD Posts: 19	i thought the egr like recycled gas in to the intake ? because it smells like its not because it cant open up because its getting loaded up so much

November 4th, 2009, 05:03 PM	#6
89lx4life Newbie 1989 Mustang LX Join Date: Nov 2009 Location: Hagerstown, MD Posts: 19	okay, so its prob a vacuum leak would the leak cause the bucking that im getting ? cuz thats when im gettin it when im cruising really, havent looked for codes and yeah it comes on and off during it, my idle is shit right now its like 500 and on a cold start it wont keep i have to rev it for a little while

November 4th, 2009, 05:16 PM	#8
89lx4life Newbie 1989 Mustang LX Join Date: Nov 2009 Location: Hagerstown, MD Posts: 19	k codes it is, thanks

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