Womb Raider

Whats going on evolutionm, need some help figuring out this idle problem, its killing me inside very very slowly lol.

so my evo has been sitting for about a year a half, recently got it back on the streets, but my idle is super rough and air/fuel is all over the place unless im actually driving, in that case it stays between 14-15.

I had 3 codes come up:

P0172 (system too rich (i have stock injectors atm, waiting for fp turbo to get here before i swap em out for pte 1200cc injectors))

P1400 (Manifold Differential Pressure Sensor circuit)

P0441 (EVAP Emission Control System Purge Flow)

I changed the sensor thats sits on top of my intake mani to fix the p1400 code. Cleared the code and now my cel isnt on anymore but still rough idle.

ive seafoamed my vehicle twice to clean the fuel system from it sitting for so long w/ gas in it.

my turbo is bad, compressor side i want to say, could that cause it?

im going to pull the maf sensor and see if thats the case, is there a way to test it?

I'd appreciate any suggestions, thanks.

In addition, ive driven it for a a couple hours after switching sensor, still no cel.

TomekEVO

iTrader: (1)

Fixing the P0441 code will most likely get rid of your idle issue.

What kind of fuel pump do you have?

Womb Raider

Wahlboro 255.

I fixed that manifold pressure code and cleared the codes. Cel has not popped up again but is still idleing pretty rough.

Im going to send the injectors to get tested, cleaned and balanced to see if that fixes it.

Womb Raider

Update: CEL came back on, im only getting the P0441 EVAP code.

I just ordered another Solenoid im hoping its the right one. Those suckers are not cheap lol.

I'll post another update once i get it in.

Womb Raider

Ended up cancelling the order. The solenoid did not look like the defective one on my vehicle

no part stores or even the dealership has it around here.

the dealership gave me a list of solenoid part numbers yet none of them look like the one on my evo.

Solenoid part numbers:
MN143213
MR204853
MR560952
MD320313 (closest looking one, appears to have an extra nipple)

Womb Raider

I'm having a hard time finding pictures of them on google.

LetsGetThisDone

iTrader: (1)

That's the FPR solenoid. Bypass it and connect the vacuum line from the intake manifold directly to the FPR.

Womb Raider

Could that be the cause of my rough idle?

LetsGetThisDone

iTrader: (1)

It could if its stuck closed and not letting the FPR see vacuum. Which would raise fuel pressure and could cause rich condition.

Womb Raider

Yeah im running rich af on idle. I'll try that. Will that clear the code aswell?

LetsGetThisDone

iTrader: (1)

It will have no effect on the EVAP code. That's a different issue.