Re: Ruff Idle ,Huge Loss of Power
 

What is the EGR and how do I test it.

Mike

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Re: Ruff Idle ,Huge Loss of Power
 

Tried to find info on the EGR in the manual . We could not find info on a EGR .
In the mean time , I changed the oil and will be looking to see why the AC did not come when it worked last time I pulled the plenum to change the FPR .

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Re: Ruff Idle ,Huge Loss of Power
 

EGR... Exhaust Gas Recirculation. An emissions device used on vehicles from the 90s through (to a small degree) today. It puts exhaust gasses back into the intake to help minimize NoX emissions. The valve should be closed at idle and gradually opens as rpms and load come up. If it stays open at idle and low rpm rough running is the result. You will need an FSM (Factory Service Manual) to test it properly. If your doing any type of work on these cars an FSM is a must have. Internet input, as you have seen from this thread, will send you in a million different directions. Follow the test procedures in the FSM. As a stop gap measure find the EGR valve and the tube that goes to your intake manifold. It goes in right behind the IAC valve on the passenger side of the plenum. Disconnect the tube from the plenum. Find a way to plug the tube (an accordingly sized rubber stopper will do the trick) Then reconnect the tube to the plenum. Please make sure that whatever you plug it with can?t be sucked into the plenum! If that solves your problem your EGR is the issue. Usually they stick open when they go bad. But please... get an FSM and read up on the various LT5 systems. There is also a commonly available training manual that does an excellent job of explaining the various systems. I believe LGAFF sells them on CD.
H
:cheers:

Re: Ruff Idle ,Huge Loss of Power
 

Wow . Thanks
Yes I have the FSM , 2 huge red books . Thanks for that very infomative info .


Mike


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Re: Ruff Idle ,Huge Loss of Power
 

Could you record some video/audio to demonstrate the symptoms you are experiencing?

Re: Ruff Idle ,Huge Loss of Power
 

Yes I can . I will do that tomorrow .
Thanks for the help guys

Mike

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Re: Ruff Idle ,Huge Loss of Power
 

On a related note I just changed plugs on my 94. I bought it awhile ago, but had it in hiding from the wife for longer than normal. I changed plugs for the first time on this car and bought a few different sets. I pulled out some NGK Triex5 I think. I think an older plug of there. It was running fine but I am doing all the maintenance so I know where it is. I replaced these plugs with NGK Iridium plugs and ran fine for a few days then noticed a stumble turning into my driveway. Seems to stumble at times below 2000 rpm, more pronounced at 1000 to 1500. Idle didn't seem quite as smooth but after reading this analysis I might first change plugs, but also check pressure and fpr.

Re: Ruff Idle ,Huge Loss of Power
 

I already have LGAFF CD but I can't find the dam thing . I bought that CD even before I got the car . It's here somewhere . Will keep looking or just buy another one . Completely forgot that I had it .

Re: Ruff Idle ,Huge Loss of Power
 

Everything you need should be in your 1995 Factory Service Manual.
If I had one I could point you i the right direction.
H
:cheers:

Re: Ruff Idle ,Huge Loss of Power
 

Oh ,, you mean the big read Books ! Yikes ... There a bit of a read indeed .

Will figure it out eventually . Not like we can go any where right now so in no rush .

Bugs me that I can't find the CD . It will pop up somewhere in the house one day

:-D