Check Engine Light??

[V10 MOJO]

dynoed my car last night and this morning Check Engine Light is On??? any takers on what may be up before i put it up on jacks and start playing around with things i dont know much about

 

[YouWish]

Have your cats been removed? If not have you checked for an exhaust leak? What does your code read?

 

[V10 MOJO]

nothing new done for quite some time, like i said, only thing done lately was a dyno yesterday and now a check engine light today

 

[YouWish]

nothing new done for quite some time, like i said, only thing done lately was a dyno yesterday and now a check engine light today

When you dyno'd did you have them check to see how lean you are running? Dyno puts alot of stress on the motor because you are running at or near red-line. If you are running too lean this could cause the "check-engine" light to come on.

 

[Greg 99ACR Red and Silver]

Did you gas up in the last few days? Could be as simple as a not-so-tight gas cap. Wratchet it tighter, and if it is the culprit, the light will go out after a few more starts. Several times in my ownership, the light's gone off and not reappeared after 15-20 start cycles.

 

[Snake Bitten]

Dyno puts alot of stress on the motor because you are running at or near red-line. If you are running too lean this could cause the "check-engine" light to come on.

MOJO lives in the "near red-line" zone...

Rich...get the code read at Pep Boys, Auto Zone, Napa...for free...then post the codes...and buy a code reader while you're at it...Roe's gotta one cheap...

 

[Tom86ZT]

On the dyno you may have built up extra heat through the cats and back to the O2's. Try the ingnition reset trick (with car off, turn key to on (not start) and back off. Repeat this about 10 times in succesion). This will clear the code. Then drive normally (for you of course rich). If it comes back something else is going and you'll need to read the code.

 

[V10 MOJO]

yeah, i guess your right, i should buy one, Ok im going for a drive to autozone

 

[V10 MOJO]

went to autozone bought one; code P1494; book says, "youre a dumbasss tighten gascap", LOL

 

[Vipermed 97.01]

Actually 1494 is also a leak detection pump pressure switch or mechanical fault,which is behind your frt facia on the drivers side,possible vacumn line off.that is if the gas cap tightening did not work

 

[V10 MOJO]

shiit OK so its up on jackstands now anyway for other stuff im doing, what then do i look for GURU. im racing saturday so this thing gotta work right