check engine while running, help Options

[empite]

Hello guys , I have a half cut st205 that when I start the engine the check turns off and after couple seconds turns on again , 3 things cause this probably and I want to make sure who exactly knows very good the motor .
1)I use a fuel pump that is probably from lower cc engine because the fuel recycling that does (when the pump send the fuel to the fuel filter and after to the engine becks and after all the fuel is more than it needs goes back to the reservoir) is very low I can record it with video if you don't understand what I mean. So does the engine check cause by fuel low compression?
2) does the engine check appears cause some fuel becks needs to be clean? Or the check engine doesn't appear if the fuel becks doesn't work or something like that?
3) theres a valve for idling rpm i think, that's missing

The motor on idling runs with 700 rpm and sounds like needs more fuel or some fuel beck doesn't work...
What do you think guys ?

Thank you in advance

[richee3]

It's best to pull the code to see exactly what the problem is instead of guessing. Jump a paperclip or short piece of wire between the TE1 and E1 pins in the Diagnostic box then count the number of CEL flashes. I have a thread in the stickies that lists all the codes.

[empite]

It's best to pull the code to see exactly what the problem is instead of guessing. Jump a paperclip or short piece of wire between the TE1 and E1 pins in the Diagnostic box then count the number of CEL flashes. I have a thread in the stickies that lists all the codes.

Yes I know I was already do this yesterday but I didn't have much time , thanks for the advance by the way . what's your knowledge about the fuel on the motor 3sgte ? Is it true that needs bigger fuel pump that 1800cc has ? Cause they told me to buy a supra fuel pump