runs great but gets jumpy? 95 formula m6
 

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

Re: runs great but gets jumpy? 95 formula m6
 

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

Re: runs great but gets jumpy? 95 formula m6
 

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.

Re: runs great but gets jumpy? 95 formula m6
 

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

Re: runs great but gets jumpy? 95 formula m6
 

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.

Re: runs great but gets jumpy? 95 formula m6
 

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

Re: runs great but gets jumpy? 95 formula m6
 

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

Re: runs great but gets jumpy? 95 formula m6
 

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

Re: runs great but gets jumpy? 95 formula m6
 

Glad to hear you got it fixed.