Check engine light goes out at steady speed

[ericem]

Hey guys. I thought my knock sensor was the reason for the code, but I removed it and inspected it, and saw no cracks, and the connector looks to be the newer updated one, looks clean like a new sensor. There was a MAF sensor code too. Need to check again though. What could be the issue most likely if the check engine light goes out at a steady pace, and when the engine is cool? I have a spare MAF sensor, it is the one N/A's use. Think I should pop it in? Anything else that can cause a code like this? Thanks guys!

 

Forgot to add when the check engine light is on, the rpms like to surge, like if i hold my pedal at once place, it will fain rpm's but like surge, and my idle surges up and down. Would a knock sensor do this??

 

Car is a 94 SS

Edited February 6, 2009 by ericem

[GeneralDisorder]

N/A MAF will not work. Wrong output voltages.

 

The knock sensor is probably bad regardless of what it looks like. Mine didn't look bad either.... drop the $50 on a new one.

 

Clean the MAF with some electrical contact cleaner. The wires get dirty.

 

GD

[msmithmmx]

If it's telling you knock sensor then I would replace with a known good one. Post on Things needed. You can grab one for under 10 bucks.

[ericem]

The one in my N/A wagon is good recently replaced. Going to swap it and see how it runs. I remember the knock sensor was cracked on my N/A and figured I should replace it but there was no code. Made pretty well no difference to be honest. Was looking at fuel economy savings more then anything. I am just hoping it is not a wiring issue, but it doesn't seem to be since if I wiggle the wire etc it doesn't go away only like i said if the engine is somewhat colder then completly warmed up or I am on the highway it is fine.