I have no egr valve will it effect my performance? the car is down on power do you have any suggestions?

 

Yes it will hurt if its not programmed out of your prom. Get a new valve.

 

EGR is one of those things that are actually good for your car. It does not rob performace because it shuts down at WOT but it helps with emmsions and cooling the combustion chamber. Most people only get rid of it to clean up their engine bay a bit.

 

not that im doubting you or anything, just curious. How does a faulty egr valve hurt performance? or does it just hurt gas milage.

-chuck

 

Well it hurts gas mileage and if it is stuck wide open it will not shut off when you go WOT. That means that you are re-combusting all of that residual exhaust gas and you are not getting a fresh charge in each intake stroke. That kills your power numbers. EGR is meant for low engine load at low rpms. If it is malfunctioning it will effect the way you car runs at any rpm even if you can't feel it.

 

More like how does the ecm hurt performance it gets a code and then goes to a perset mode that is not a good mode for milege

end why get ride of egr its not working at idle or wot so why kill us off faster.

 

Well the ecm doesn't hurt the performance it is the intake charge that decreases the power. A hot, oxygen depleted intake chage is not optimun for a powerfull burn. Also, if it hangs open to much the O2 could read a rich condition. I really don't understand the wording of your last question. If you could re-word that a bit I could possibly answer it better.

 

i put the egr on and the car still runs bad it has no top end power and giveup at 3800rpm I have new pluga cap rotor o2 coil I have on idea where to start

 

if you are suffering from upper RPM drop off (other than what these cars have normaly) i would check spark, and fuel pressure. the EGR should not effect WOT performance, unless the chambers are getting hot, and causeing detination. to check your knock counts, you would need a scan tool of some sorts. scanning the car would give you a ton of other valuable data to help you find the lack of performance.

 

omw, never knew it could cause that?!

Is this common when the EGR isnt working? b/c i was getting insanely high knock counts last time i checked and the best i could come up with was the lack of a muffler, or a bad sensor. Maybe this EGR is the cause b/c everything else (engine wise) is still stock.

-chuck

 

well, the EGR returns and inert gas back into the cubustions process, and helps to cool the cumbustion process. if you cumbustion process is really hot, it can heat the heads up. especialy if there is a edge or sharp point. when those get hot enough, it can actualy ignite the intake charge, cuasing detination.

 

Is it normal to have 0 knock signal on the auto x-ray

 

?

 

Well, considering how well i've heard our stock heads are made i bet this could be the main cause of my high knock counts, After i get my exhaust all done we'll find out for sure.

-chuck

 

Chuck,

after you exaust you could just be lean. i had BLMs in the 140+ range in higher RPMs after my headers went on. with a free flowing exaust, you have alot of room for more air