Odd EGR valve problem

[asnider]

Hi all. I'm new to this, so please bear with me. Just bought a '94 Ranger, 2.3L 4 cyl, 2wd, ext cab, XLT. Keep getting check engine light. Thanks to the great info here, pulled the codes, got 332 and 172. The downstream O2 sensor is MIA, so I'm focusing on the EGR valve code. Checked all vacuum lines. All looked good. Removed valve and cleaned it. Valve works when vacuum applied (sucked on it while looking in mirror and could see valve lift with little suction). Reattached and tightened connecting pipe to exhaust (which was so loose it rattled). Disconnected battery to reset codes. Drove. Still getting 332 code. When I pull the vacuum line off when the engine is hot and running, suction is very weak. Strong going into solenoid (enough to stick to my finger) but very weak coming out. Not getting solenoid code. Could this be the problem anyway? Could the missing O2 sensor be causing the solenoid to misbehave? Can a solenoid be fixed? Thanks for any insight you can offer.

 

[scotts90ranger]

the post cat O2 sensor wasn't on these things until '95, and in that case I'm not sure if you have 2 or 3 digit codes on that year...

 

[asnider]

Hmmm, there was a bung on the exhaust where the Haynes manual said an O2 sensor should be, but there was no wiring near it. I found that odd. I'm definitely getting 3 digit codes. I was careful counting and both the Ford dealership and Midas got the same codes I did.

 

[scotts90ranger]

ok, 3 digit it is then.

 

[Ranger44]

It's possible that vacuum line has a hole or crack.

Have you checked the ports leading into the intake for carbon buildup?