Hey everybody, longtime fan of the site. I have a stock 2.8 automatic multiport that has been my daily driver for going on 4 years now.

After dropping my dad off at the airport I noticed that my car was running a little rough and my gas mileage was plummeting. Also at idle the car is vibrating almost surging ahead or choking.

Now the first time I looked for trouble codes I got 34 for MAF, so I took out the MAF, cleaned it, put it back in, MAF code is gone.

Went for a drive, still riding rough and now my voltage meter on the dash is jumping to 18 volts. Pull over the car and retrieve trouble code 53 from the ECM, which is system voltage is to high or digital egr valve solenoid error.

Reconnect all wires to the alternator, started the car up, no codes, but car is still riding rough.

Im inclined to think I need a new EGR Valve or 02 sensor based on the symptoms but Im not getting any trouble codes, but before I go out buy the part and install it, any other ideas from the minds on the board about possible solutions or troubleshooting suggestions? Is there a way to test the o2 sensor without causing to much damage?

Thanks!!!

 

i realize this post is 1 year and 2 months old, but wanted to give you my exp. I need a new egr valve and it's causing code 32 (egr) and code 44 (oxy sensor). I have the same symptoms you do.

Make sure your egr valve isn't stuck. lightly press the diaphram upward and that will unstick it, at least for a short time. It made a big difference with mine.

Now i'm having trouble finding a replacement EGR valve. No one carries them and/or can't order them.

 

I found an EGR valve at Advance Auto it was just under a $ 100 if I remember right .