Those mickeys would still make great sand tires as is.
Today the check engine light came on and I can't seem to get it into the "diagnostic mode" where it flashes codes. Any thoughts or suggestions?
It's carbureted but it has the electronic controls. It runs perfect but I heard that it could be my oil pressure switch so I replace that and my distributer with a new msd unit and I still have a check engine lightHave you got any driveability issues? Running rough? Hesitation? Mis-firing? What's going on besides the light being on?
Keep this in mind, TBI systems are very basic with being OBD1 won't set codes unless something is way out of line. Gotta go old school here and diagnose your symptoms if you got any if you can't flash codes out of the ECM. Don't overlook the basics. Plugs/wires/cap/rotor if it's an ignition miss. Running out of power under load? Check the fuel filter. Inconsistent idle quality? Check for carbon build up on the throttle body itself or on the IAC.
I could keep going but without symptoms I could go all over the place.
Thanks it is the worst carb because of the emission control. I want to change to the fitech efi system but it's not smog legal in californiaYikes..Computer Command Control Quadrajet. Now I see the location is California. It all makes sense.
That being said, you probably pulled out a ESC (electronic spark control) distributator for the MSD unit. While it probably works without the ESC dizzy, the ECM is probably looking for it.
For lack of any driveability issue I'd drive it with the light on. Had you not been in CA, I'd say disable the system to ditch the early computer controls. but you got to pass emissions and I'm sure they check the light works correctly during the test. If the lights on, no test, go fix.
I'd probably take the time to invest in a GM factory service manual and Electrical schematic manual and follow the GM diagnositcs to find out why you can't get codes out of it and then what to do once you get the codes read and can get the problem is. Chiltons or Haynes manuals suck in this department as they are generic for multiple years.
Damn, that's a good idea! I never thought to add push on fittings to my rubber lines. Would make dropping the saddle tanks in my crew cab easier IMO. Right now I just have a lot of extra length coiled up there so the tanks can come all the way to the floor.