92 2.3L Check Engine Light - Codes 327, 328, 334

[pad2383]

Hi,

I've got a 1992 Ford Ranger 2.3L with about 240,000 miles on it. The check engine light started blinking on and off pretty regularly so I pulled the OBD1 continuous memory codes and came up with this.

327 - EVP/EPT circuit below minimum voltage

328 - EGR closed valve voltage lower than expected

334 - EGR closed valve voltage high

I can't say these codes mean a whole lot to me besides I've got issues with my EGR valve or the EGR valve position sensor.

I replaced the MAP sensor/EGR vacuum solenoid less than two years ago, so that ought to be fine.

I figured I would post and see if anyone had insight into these codes or the combination of them together. Any tips for diagnosing/fixing it? I was thinking I'd start by replacing the EVP sensor. They're not too pricey.


Pad

 

[PetesPonies]

Put a vacuum hose on the EGR valve and suck on it. If you can draw air the EGR is bad.

 

[pad2383]

Just in case it might help someone else in the same situation, I put a new EVP (EGR position sensor) in and that fixed up the problem. No more check engine light and running great.