Fuel pump and CEL

[freshtiva]

Anyone know off hand if a failing fuel pump would trigger a check engine light. Last night my car was surging and every time it surged the CEL would come on briefly. Nothing obvious after a quick look under the hood.

[Pu241]

No, none of my fuel pump failures threw a CEL.
But, also none of them failed in the way you describe.
They ran fine, then on the next start-up "no go".
I'm thinking your issue could well be somewhere else.

[freshtiva]

Mmm, drove it this morning and it ran perfectly, no surging, no CEL

[freshtiva]

Its back, anyone have a clue ? See video below

[georgeb]

Ground the STI and see if it shows something.

[MasterTec]

Could be the ECM relay. The computer keeps resetting maybe?

[freshtiva]

Ground the STI and see if it shows something.

I used my multimeter ( + cable on the STO pin of the self test output plug, - cable to ground ) and used a jumper to ground the self test input connector. I got a code of 9. Anyone know what 9 is ?

[sc72]

CEL Code

Hello Fresh, the 09 code is asking to have the coolant temperature sensor checked. Good luck.

[freshtiva]

Thanks, thats the one on the intake manifold right ?

[georgeb]

You don't need a multimeter. The CEL blinks the code.

[sc72]

CEL Code

yes it is, i changed mine and improved the mpg's.

[freshtiva]

You don't need a multimeter. The CEL blinks the code.

Oh yeah ? Just ground the STI plug ? Does that work on both KOEO & KOER tests ?

[freshtiva]

Wow, too cool !! Thats much easier Still getting a nine. Video below

[georgeb]

Not familiar with the tests you mention above.

[freshtiva]

KOEO ( key on engine off ) KOER (key on engine running)