I bought a cheap replacement and it appears to be a back presser type egr valve.The end of the valve has a hole in it and the valve will not operate under vacuum unless there is pressure to the hole.The old one I removed does not appear to be like that.
Is the egr valve on a 1990 the back pressure type?
- Thread starter john.0_o
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if you are asking if you bought the correct valve you would have to supply the manufacturer and part#. It is either the correct valve or not there is no such thing as two different ways of functioning for the correct part . Below is link to an EGR for your car, it is activated by engine vacuum.
http://www.autozone.com/autozone/pa...y?filterByKeyWord=egr+valve&fromString=search
http://www.autozone.com/autozone/pa...y?filterByKeyWord=egr+valve&fromString=search
Of coarse it's either the correct one or not.
My question was not if I bought the correct valve but weather or not the correct egr valve in a 1990 uses a back pressure egr valve or not(read title of thread).I ordered one that was supposed to be the correct one,but that does not mean I actually got the correct one.With no numbers on it I have no way of knowing.
I know it's activated by engine vacuum but some of them need positive pressure from the exhaust before they will allow the engine vacuum to do its job and the one I received is one of those.
If you are not familiar with the two take a look here.It explains the difference between a vacuum operated egr and a positive back pressure ergr.
http://www.agcoauto.com/content/news/p2_articleid/207
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this link shows the original equipment part AC Delco 214-5076 GM part number 17113374. If it matches the EGR you removed you will know which version is correct.
http://www.ebay.com/itm/like/170781191091?lpid=82
http://www.ebay.com/itm/like/170781191091?lpid=82
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Thanks for that link.The old one looks just like it with the exception of the last number on the part number mine is 17089051 not 17089050.I would imagine they are the same.I'm just going to go ahead and tear apart the old one and find out for sure.I'll post my findings.
Evilcowboy420
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Why in a 23 year old car? Considering Missouri law has no emissions test on 95 and older vehicles why not block the hole with a plate and forget about it. Those EGR valves are designed to fail (at least I am convinced of it). The diaphragm ruptures creating a vacuum leak that can make you go on a wild goose hunt to find.
I understand you already paid for it but I would do the cheap block off by taking a aluminum can and tracing an outline of your gasket and fit the piece on the manifold with the gasket and EGR and then just plug up the vacuum line.
All those stupid and retarded things do is rob the engine of potential power and does a fantastic job of making an intake manifold look like an exhaust manifold. Which is why you probably had that nice looking lump of carbon fused to the rectangle opening when you removed it.
I still stand by the visual evidence that a blocked Intake manifold will always be cleaner than one running an EGR valve.
You will throw a light unless you reprogram the eprom to a higher value for it to trigger the egr. Just my thoughts
I understand you already paid for it but I would do the cheap block off by taking a aluminum can and tracing an outline of your gasket and fit the piece on the manifold with the gasket and EGR and then just plug up the vacuum line.
All those stupid and retarded things do is rob the engine of potential power and does a fantastic job of making an intake manifold look like an exhaust manifold. Which is why you probably had that nice looking lump of carbon fused to the rectangle opening when you removed it.
I still stand by the visual evidence that a blocked Intake manifold will always be cleaner than one running an EGR valve.
You will throw a light unless you reprogram the eprom to a higher value for it to trigger the egr. Just my thoughts