egr on 87 b2 bad milage and running rich?

[dch1992]

could the egr on my 87 b2 2.9 cause it to run rich and get horrible milage

 

[adsm08]

I'd be looking at bad O2 sensors before I suspect EGR problems. Does it do anything else?

 

[Shran]

Keeping mind that it's really hard to troubleshoot over the internet, my experience points toward a possible bad fuel pressure regulator, but it is just a guess.

 

[dch1992]

sorry for not posting enough info got a new o2 senor about a month ago has been running rich but better sence then 2 new fuel pumps both were bad...got a obd 1 code scanner codes 33 34 and 41 come up one has to do with egr pressure senor fault ordered a new one another one is egr valve not open and closing properly...i think it cause the pressure senor and 41 was rich or lean maybe it was 42 so thats we i got the egr thing from

thnx