egr valve gasket w/screen!

[Kafka45]

I'm having a HUGE problem with carbon and my EGR valve. I've read here that there is a egr gasket with a screen available. I haven't found one on the web so far. Anyone know where I can get one? This taking off the valve and cleaning it out every couple of days is getting to be a royal pain.

thanks...

k

94 SS K&N air... Magnaflow exhaust..

[busa_4]

every couple of days? you have more than egr problems! i would say you are running very rich to have carbon buildup in days. check your fuel system. perform a fuel injection service and perform a intake clean. you are going to want to get that carbon off the intake, throttle plate, intake valves, and combustion chamber.

[princeal]

I agree I think you have a serious carbon problem that needs addressed But after that the company that makes the screen is Tomco Inc. they call it the Klean Screen I found them on the net. they can tell you your nearest dealer The gasket was a little over 11.00

[BlazerLT]

It is not worth that kind of money.

You have to ge tthe carbon out of the engine. You just can't get a screen and forget about it. The carbon chunks will build up and cause even more problems.

Better to have the carbon out of the engine than trapped in it.

[sector95]

Originally Posted by Kafka45

I'm having a HUGE problem with carbon and my EGR valve. I've read here that there is a egr gasket with a screen available. I haven't found one on the web so far. Anyone know where I can get one? This taking off the valve and cleaning it out every couple of days is getting to be a royal pain.

thanks...

k

94 SS K&N air... Magnaflow exhaust..

First off, the EGR valve *will* have carbon on it....that's what it passes back into the intake track: exhaust gas. When you say you're having a "HUGE problem" what exactly do you mean? Are you getting an engine light or some other symptom that would point to your EGR valve? What happens if you don't clean the valve "every couple of days"?

I think you may be worrying about nothing. If there is truely enough carbon building up on your EGR valve to cause some OBD malfunction code or major driveability problems, then you need to look elswhere. If the mixture is that rich then you've got a problem in your fuel injection system, the computer or both. If the problem is this serious it more than likely would've set a trouble code. Have you tried downloading the OBD trouble codes...if there are any?

Mike

[mike3028]

hey yall, my son had the same problem om his 95. didnt know at the time, but is easy to clean. he said this is a problem with the 4.3's. he removed intake an soaked it overnight and put it back on the next morning. been running fine for more than 2 yrs. now. of course he cleaned the egr valve too. anyway just thought i would mention that. good luck!

[BlazerLT]

Originally Posted by sector95

First off, the EGR valve *will* have carbon on it....that's what it passes back into the intake track: exhaust gas. When you say you're having a "HUGE problem" what exactly do you mean? Are you getting an engine light or some other symptom that would point to your EGR valve? What happens if you don't clean the valve "every couple of days"?

I think you may be worrying about nothing. If there is truely enough carbon building up on your EGR valve to cause some OBD malfunction code or major driveability problems, then you need to look elswhere. If the mixture is that rich then you've got a problem in your fuel injection system, the computer or both. If the problem is this serious it more than likely would've set a trouble code. Have you tried downloading the OBD trouble codes...if there are any?

Mike

I have no idea what you said there.

He has carbon stuck in his EGR, end of story.

[sector95]

Originally Posted by BlazerLT

I have no idea what you said there.

He has carbon stuck in his EGR, end of story.

Whoa...hey, have we got some insight here, eh?


If you're not familiar with what the OBD computer on your '95 controls and monitors, maybe you should read up on it. From reading other threads on this forum this is apparently a common occurance on some late model S10's with certain versions of the 4.3L engine. I had a '93 TBI 4.3L and had no EGR system problems.

If this were my truck I would see if there are any trouble codes locked in the OBD computer. Not every malfunction will turn on the "Check Engine" light. Some autoparts stores will down load the codes for free so check around. Excessive carbon is indicative of either a rich mixture or burning oil. A rich mixture condition should not normally occur in a modern, computer-controlled, fuel injected engine. There may be a malfunction in the fuel system or a sensor has gone bad. The oxygen (O2) sensor monitors the mixture based on exhaust gas tempurature and has a direct input to the fuel injection system. Again, if it were my truck, I would replace the O2 sensor to eliminate it as a possible cause; they aren't that expensive and you can do it yourself. I would also check with the dealership to see if there is a Tech Bulletin covering this condition. It may not be common enough for an official recall but GM may be aware of the condition especially if it concerns emissions equipment. If there is a driveability (emissions) problem then chances are it has set a code.

Good luck.....

[BlazerLT]

Originally Posted by sector95

Whoa...hey, have we got some insight here, eh?

No, just keeping people from confusing him.

Originally Posted by sector95

If you're not familiar with what the OBD computer on your '95 controls and monitors, maybe you should read up on it. From reading other threads on this forum this is apparently a common occurance on some late model S10's with certain versions of the 4.3L engine. I had a '93 TBI 4.3L and had no EGR system problems.

Actually, you need to read up a bit because on the TBI 4.3L in 1995, it was a OBDI based vacuum EGR valve whereas the CPI 4.3L was OBDII in 1995 with a Electronic Linear EGR valve.

Originally Posted by sector95

If this were my truck I would see if there are any trouble codes locked in the OBD computer. Not every malfunction will turn on the "Check Engine" light. Some autoparts stores will down load the codes for free so check around. Excessive carbon is indicative of either a rich mixture or burning oil. A rich mixture condition should not normally occur in a modern, computer-controlled, fuel injected engine. There may be a malfunction in the fuel system or a sensor has gone bad. The oxygen (O2) sensor monitors the mixture based on exhaust gas tempurature and has a direct input to the fuel injection system. Again, if it were my truck, I would replace the O2 sensor to eliminate it as a possible cause; they aren't that expensive and you can do it yourself. I would also check with the dealership to see if there is a Tech Bulletin covering this condition. It may not be common enough for an official recall but GM may be aware of the condition especially if it concerns emissions equipment. If there is a driveability (emissions) problem then chances are it has set a code.

Good luck.....

You see, again, you are making things completely more complicated than they have to be. The EGR valve is clogged open and is flooding the cylinders with exhaust gas at idle which causes the rough idle condition.

You clean the valve, end of story.

You don't have to go through picking the engine apart because an EGR valve is stuck open.

That is all I am saying.

[sector95]

Originally Posted by BlazerLT

No, just keeping people from confusing him.



Actually, you need to read up a bit because on the TBI 4.3L in 1995, it was a OBDI based vacuum EGR valve whereas the CPI 4.3L was OBDII in 1995 with a Electronic Linear EGR valve.



You see, again, you are making things completely more complicated than they have to be. The EGR valve is clogged open and is flooding the cylinders with exhaust gas at idle which causes the rough idle condition.

You clean the valve, end of story.

You don't have to go through picking the engine apart because an EGR valve is stuck open.

That is all I am saying.

Ultimately it doesn't really matter what kind of EGR valve is on the engine or how it is activiated. The bottom line is that this poor guy is cleaning this valve *every couple of days* becuase of an excessive build up of carbon ....definitlely not a normal situation, wouldn't you agree? And, since you've pointed out this engine has the OBDII computer, there is probably a greater chance this computer has some malfunction codes locked into it since the electronic linear EGR is not working right (I got a malfuction code set when the one on my '98 Sierra died at 65K).

Downloading trouble codes and/or R&R-ing an O2 sensor (or maybe two, depending on the engine and emissions package) is hardly picking an engine apart.

Potentially, a lot of info can be gleaned from the onboard diagnostic computers on these vehicles; all I'm saying is why not check it out if it hasn't already been done, especially if you can get it done free? Why are you so adamently against such an idea? I like the simple solution too, but in this case it doesn't seem to be working....

Personally, I'd like to hear from the fella who initially posted this question and find out from him how things are going rather than getting into an argument in semantics.

What say ye?

Mike

[BlazerLT]

Ask any GM technician about this Linear EGR system and you will find out that it is completely normal for this to happen with this EGR valve.

It is just a normal part of it. Only way to get around it is to remove the intake and have it bead blasted and hot tanked.

There is no need to go into a full emmisions system overhaul.

[sector95]

Originally Posted by BlazerLT

Ask any GM technician about this Linear EGR system and you will find out that it is completely normal for this to happen with this EGR valve.

It is just a normal part of it. Only way to get around it is to remove the intake and have it bead blasted and hot tanked.

There is no need to go into a full emmisions system overhaul.

As Charlie Brown would say,

AAAAAAAAARRRRRRRRRRGGGGGGGHHHHHHHHHHH!

Forget it Bub.... "UNCLE"....... "I give"....... You're right, I'm wrong.

Whew!

Do you feel better now?


BTW... are you a "GM Technician"?

[BlazerLT]

Oh here we go with the credibility attack again.

No I am not but I know one, shall I go and make a video of him at the dealership saying what I just told you?

Better yet, go to a GM technician yourself and ask them.

I don't pull things out of my ass bro, so enough of the credential attack.