Originally posted by brapple:
sorry if it wasn't clear but we have cleaned the throttle body hoping that would solve the problem

We think since the car idles fine it is not the EGR valve. So that would only leave the DPFE sensor right?



Correct, sort of. If you want to check your EGR valve, just get a short length of tubing from the auto parts store. It should be a small diameter size to fit the nipple on the EGR valve.

1. Unplug the stock vac hose from the valve & plug in your blank length.
2. Start the car & put a vacuum on the tube (suck on it if you don't have a pump).
3. If the car stumbles or stalls the valve may be good. To verify:
4. Apply vacuum until the car stumbles, if you can hold a constant vac by pinching the hose to keep the car running rough then your valve is good, no leaks.

Now its time to focus on the DPFE.

The older aluminum body DPFE units had a tendency to accumulate corrosion & fail (like mine).

The DPFE is just a little tricky to get to, even though it is in plain sight just below the EGR valve. Its held in place with two bolts & has two vacuum hoses plugged into it. If you're just a little handy & your arms are not gorilla size this should be a 4 out of 10 on the difficulty scale - just keep track of the hoses (see my signature below).

Must be that jumbly-wumbly thing happening again.