Engine/Transmission (1994 - 1998) Egr Valve ??????

[Bob Hart]

Check eng lite when on Had it checked out and was told that my EGR Valve needed to be replaced. I understand that it is only on Calif trucks. Cost of valve $312. 00 Plus $112 to install. It looks to me as tho it would be simple to change. Could I get into any proplems changing it myself ???

Do I need this valve at all?

 

[cksh8me]

Dead EGR

My egr died at about 100k miles and I put a plate in place of it for about a buck. Now the truck has over 260k miles and no problems. You don't have to smog a diesel so that is not an issue. After your truck is warmed up it the egr closes off and works just like a plate. If you do want to replace it it's a couple of bolts and a hose fitting. Good luck

 

[Bob Hart]

Thank you for the info

 

[jtwcummins]

12V Egrs are interesting. When the ECT measure coolant at 140* the ECM picks up the EGR solenoid, this opens the valve and allows exhaust to mix with intake air. The typical codes are for poor EGR flow, but all seem to show as a 32 using the Check Engine Light. Flow is checked by an increase in IAT, Intake Air, of about 10* when exhaust is put in the intake manifold. The EGR is on all the time when above 140* except during wide open throttle, WOT. Most gas engine EGRs can't be open at idle, will kill the engine or make the idle rough. The EGR system is really simple mechanically. A tube from the exhaust manifold to the intake with the valve on the intake. The valve can be easily checked by using a hand vac pump and seeing if the pintle on the diaphram moves on the EGR valve. The valve and the tube can be removed and cleaned if the valve pintle moves.



The best way to disable is to put a screw in the vac line from solenoid to the valve. I installed an ATS manifold and a dual ram w/o EGR. I used the solenoid in the front diff vac line so I can go to 4 wheel low with the front diff disabled and back a trailer w/o any problem. Having it off caused a constant check engine lite. I used a relay in the solenoid circuit that adds a pot to the IAT when the EGR is suppose to be on, by fiddling I was able to get the MIL to stay off.

 

[BPonci]

What year is your truck? If its a 96 the egr valve valve can be removed without a check engine light coming on. Do yourself a favor and install a 95 year model intake plenum.

 

[jtwcummins]

It's a 97 w/ an engine for a 96 since it was built in Jan 1997. Will stick with the Banks twin ram. One of the parts supplied is a door jamb sticker with a CARB number, this makes it legal if Cal ever starts going emissions nuts.

 

[Bob Hart]

my truck is 1998

 

[firemanshawn]

My EGR went out while camping..... It created a vacume leak and would not allow my airconditioning control system to work right ( the air would blow out the defroster and nowhere else). I plugged the vacum line between the sonlinoid and the EGR. I have had no problems up to this point.

 

[Joe G.]

A friend of mine had a problem with the EGR on his '97. Truck ran fine, but very low power. The problem was that there is some sort of connection from the EGR to the AFC. (I'm not familiar with the details of the EGR on a '97. ) The boost connection to the AFC carboned up and blocked it. He has an AFC from a '95 on it now and it runs great.

 

[jtwcummins]

The EGR will fill the intake manifold with soot. When I installed the twin ram I used a shop vac to get it out. Was built up enough to block the vac

 

[BPonci]

Discard and be done with it.