idle problems

Edit: Just took the OBD-1 codes. KOEO readings were: 157 - (R,M) Mass Air Flow signal is/was low or grounded - MAF [Understandable, had the MAFS disconnected to get it started] 543 - (O) Fuel pump monitor circuit shows no power - Power / Fuel Pump Circuits KOER readings were: 173 - (R,M)...

'93 Ranger has a rough idle whether it's warmed up for cold start. It will shudder down to what sounds like 600rpm then it will kick back up and it will keep going back to the shaking and shuddering. I could change the plugs, wires, injector. What's wrong with it?

I'm wondering if anyone has had a high idle issue that is not due to a bad TPS, IAC, or TPS connector as I have seen on the other related posts? In my 2000 2.5L, 2wd manual trans, 87,000 original miles, I have replaced the IAC and the TPS first with no change and then the TPS connector($130 out...

My idle keeps bouncing between 900 and 800 rpm. Dose it every 2 seconds. Now and then it will fall to 500 rpm and die. I have searched everywhere for a vacuum leak. No codes. checked everything. Put a hose clamp on the pvc to manifold vacuum line. It was working perfect staying right at 850 rpm...

wont idle in cold weather -------------------------------------------------------------------------------- i got a 98 ranger with a 4.0 ohv engine and the check engine light has been on for about a year and a half. it keeps throwing the same code, the fuel system is too lean in banks 1 and 2...