My check engine light has came on for the second time in 3 months, and considering that i purchased one of those p.o.s. "speed chip" things off ebay, do you think that could be messing it up. When i first installed it, the check engine light didn't come on, and didn't for a month after that. i got it fixed, and it was a coil and a spark plug. The same thing seems to be happening again. could this be the problem?
2nd time my check engine light came on
- Thread starter KD00LS
- Start date
That chip is definitely the problem. If you search on here you will find discussions of it. It tries to trick your PCM into thinking the air is colder than it is. Since the PCM is smart it later detects this problem and sends the check engine thing. Remove it immediately. Plus it has been shown to not show any performance increase after the first few drives. System relearns itself.
Quik LS
Dedicated LVC Member
yep - it's likely telling you the IAT sensor has faulted - which is the sensor you removed and shorted with the resistor.
well, the first time i took it to the shop for the check engine light, it was a blown coil and spark plug..... would this chip destroy those sensors? if so, where can i get replacement wires, or can i just mend the two copper wires together again? :slam
Quik LS
Dedicated LVC Member
Well - I don''t think is could directly cause you these problem - more likely could cause you to run too rich and foul up your plugs over time....KD00LS said:
Quik LS
Dedicated LVC Member
It may - if it is faking your LS into thinking is 'extremely' cold I'm not sure what adjustments the powertrain makes to compensate for that.KD00LS said:
Quik LS
Dedicated LVC Member
which one do you have? - the resistor that plugs into the sensor plug or the 'box' that is cut in-line?KD00LS said:
if the resistor - simply remove the resistor and plug the wiring harness back into the IAT sensor
if the 'box' - unplug it and 'patch' the wiring
i removed the "performance chip" (piece of metal crap) and threw it into the woods, resoddered the wires together
my car still shakes a little at idle, small stuttering, should i replace all 8 plugs with better ones, or reflash the pcm
my car still shakes a little at idle, small stuttering, should i replace all 8 plugs with better ones, or reflash the pcm
Quik LS
Dedicated LVC Member
give it a couple of days to sort itself out - or - unplug the battery for 10mins to set the PCM.KD00LS said:
after i resoddered it i unplugged the positive and negative end of the battery cables, touched them a few times together, and the pcm reset
a few questions...
Should I get a pcm reflash, how much does it cost?
Should I upgrade the spark plugs, how much $?
and for now should i just put in fuel injection cleaner, and what brand?
anything you wanna add about gaskets etc. would be appreciated
a few questions...
Should I get a pcm reflash, how much does it cost?
Should I upgrade the spark plugs, how much $?
and for now should i just put in fuel injection cleaner, and what brand?
anything you wanna add about gaskets etc. would be appreciated
Quik LS
Dedicated LVC Member
only my opinion:KD00LS said:
- only reflash the PCM if you have a need that the newer code fixes
- new spark plugs make a difference, not really a believer in 'performance' spark plugs