Car has mods in sig. Smog pump is disconnected/no cats. Idle has occasionally stumbled for about 1 second or 2 like it misfired, then returns to normal. This happened 3 times in the last week (driven every day). Saturday night I pulled into my subdivision and it just died. I started it three times (turns over but didn't start up) and it finally ran on the fourth try. The stumbling is intermittent and happens out of the blue. I've had a new fuel pump/relay installed within the past two months, and it primes just fine. I ran codes and got 14, 21, 44, and 94. I'm not concerned about 44 or 94, but could someone give some input on 14 (ignition profile pickup erratic) and 21 (coolant temperature out of specified range)?
Thanks-
Ted
Thanks-
Ted