Shop Bmw EGR valves

Have the computer scanned to see if there are any stored codes in there.

thanks guys for such a quick reply. no there are no codes. i had a code for a cyl 3 misfire but that was cause of a loose plug wire. it ran about the same before the gasket replacement. i replaced it cause it was leaking coolant.

the firing order is not adjustable. i have a waste spark system. all the plugs were gapped (checked) before installation. and the wires were replace one by one to avoid mixing them up.

Of course the firing order can be wrong.
Here's the order it should be in.

sorry for the late reply. i did the tune up myself and i did not mix up any wires. i took them off one a a time and did the plug and wire at the same time.

Does it only idle rough? How does the engine run at higher rpms? Are you getting any trouble codes now?

yes. all it does is idle rough. on the highway it runs good. it revs good and there are no check engine lights. i have a code for the trans range sensor but it doesnt set off the light. i doubt that would cause this issue.

That's kinda odd there is no codes being set....

If this problem is just at idle & when in drive sitting,, you may want to take a quick look at the motor mounts.........Jack up the engine with a jack & block of wood, just enough to get the weight off the mounts, and see if it does anything for your problem.

What is the issue with the EGR valve? Most techs can tell the difference between an engine vibration from motor mounts and a vibration from misfiring, so Sid and your tech is probably pointing you in the right direction.

An EGR valve not closing is a problem and that has to be resolved. If it won't seat on it's own, then you will have to replace it.

it was not staying open fully. it was only open a little. can it be cleaned?

A little open at idle is a problem. Cleaning likely won't work. You can't access the inside at all. It should be replaced. If the engine has a lot of carbon, it could happen again if a loose piece of carbon gets caught in it.

so how would i be able to clean the carbon inside the engine?

Many shops offer an Induction system service that will breakup the carbon.

is that the cleaning that uses the walnut shells?

I have no idea what that is.

You put crushed walnuts inside the intake & then squirrels go inside the intake to get the nuts & their tails remove all the carbon from the intake........




There is also a method that is like sand blasting but instead of using sand or glas$ beads.....it uses crushed walnut shells....

there was a cleaning where crushed walnuts is used to clean carbon.

Does your scanner have the ability to monitor data stream information?

Did you reuse the EGR gasket? Check to make sure the EGR gasket is causing a leak and the EGR gasket isn't on backwards. Don't spray carb cleaner around the EGR valve, it will ignite.

Also make sure that your EVAP purge solenoid vacuum line and line to the canister is plugged in

Is the check engine light on Buddy?....If it is, pull the codes and post them here

How was it running before the gasket replacement?


Also double check your firing order