94blackonblack

ok guys been awhile i recently got a 95 firebird formula and it seems like its missing like jumpy when i get in it after 1st gear like at the end of second all the way through third fourth and fifth havent had it up to speeds were i needed 6th yet but i have no missfire code like i did with my 94 i have three codes right now and only one of them i can c being the problem but i plugged the vac going to the egr ok the codes are
27 egr electrical fault quad driver
11 this is because the ses light is gone
66 a/c pressure sensor circuit problem well the ac is gone so thats not realy a problem

i did a search and came back with none of my issues or problem that sounds similar

94blackonblack

a little more i did have a o2 code but changed the sensor and it has not returned and a ecm prom error

Injuneer

No misfire codes in OBD-1 (93-95). Misfire detection was added in 96 as part of OBD-2, which required the addition of a crank position sensor, which OBD-1 engines don't have.

You may be using the wrong code list.... there are no quad driver codes after 93. DTC 27 = EGR vacuum solenoid electric circuit fault. Similar but you can avoid mix ups in the future by using Shoebox's list specifically for the LT1.

http://shbox.com/1/Dtcs.htm

What was the actual number of the O2 sensor code? Not all O2 sensor codes involve a faulty sensor.

94blackonblack

its obd 1.5 i had to use a motis to find out what was going on and i guess that would make sense on the missfire ill have to wait tell tonight to hook my little camera under the hood and check both sides for a light show my 94 had a burned wire from the header diddnt realy feal like this but i guess it was a auto thank you for your reply

Injuneer

It isn't OBD-1.5. The Corvette LT1 used that. It had after cat O2 sensors and would produce some OBD-2 format (Pxxx) codes in addition to the OBD-1 codes. Was never used on the F-Body LT1. The 95 F-Body PCM is the same part # and code list as the 94 F-Body PCM.

94blackonblack

I have plugs and wires on the way I think they bumped a plug and cracked it putting the engine back in after sealing it up

94blackonblack

Found the problem it is the wires behind the power steering pump

94blackonblack

Thank you very much Injuneer for the info I appreciate it very much I got it fixed the top wire right behind the ps pump was broke I made a wire all is good

Injuneer

Glad to hear you got it fixed.