98 gst code p1105 Manifacture controlled fuel and air metering

[snailpwer]

Hey Im new to having a turbo car and i just bought my friends gst off of him.

the car is now throwing a code p1105 (Manufacture controlled fuel and air metering) and i have read that people say its the fps? but i dont understand what it has to do with fuel and air metering.

the car is a 98 gst with a 16g turbo, cone filter and hks cat back.

am i best off just replacing the fps

I need to know asap cause i have to pass socal smog

Thanks

 

[gofer]

Heres how you'd check the FPS to ensure that its operating correctly.

DTC P1105 - FUEL PRESSURE SOLENOID MALFUNCTION
NOTE: For terminal identification, see TERMINAL IDENTIFICATION in SELF-DIAGNOSTICS section. For circuit and wire color identification, see WIRING DIAGRAMS - 2.0L - TURBO article.


Disconnect Black vacuum hose from fuel pressure solenoid nipple. Disconnect electrical connector. Connect hand vacuum pump to solenoid nipple where hose was connected. Apply vacuum to solenoid. Go to next step.
Apply battery voltage across solenoid terminals. Vacuum should be maintained with voltage applied and should leak with voltage not applied. If vacuum is not as specified, replace solenoid. If vacuum is as specified, go to next step.
Turn ignition off. Check resistance between solenoid terminals. If resistance is 36-44 k/ohms at 68°F (20°C), go to next step. If resistance is not as specified, replace solenoid.
Turn ignition on. Check voltage between ground and solenoid connector terminal No. 1. If battery voltage exists, go to next step. If battery voltage does not exist, check wiring harness between MFI relay and solenoid.
Turn ignition off. Disconnect PCM connector. Turn ignition on. Check voltage between ground and PCM connector terminal No. 3. If battery voltage exists, check PCM connector. If PCM connector is okay, replace PCM. If battery voltage does not exist, check solenoid connector. If connector is okay, check wiring harness between PCM and solenoid.​

 

[snailpwer]

Thanks for the help i will check it in the morning to see if thats the problem

and is there an secrete on the drive cycle after i reset the ecm

like i said the car needs to pass smog asap

 

[gofer]

Mitsubishi TSB 00-13-005, OBD-II Drive Cycles

 

[nickk90]

My car is throwing the same code and I was wondering if it has anything to do with the bucking/stuttering issues I have been having. I have fresh plugs gapped correct and only have a few small boost leaks that we're there prior to this problem. If it was the FPS wouldn't it cause hot start problems?

 

[gofer]

My car is throwing the same code and I was wondering if it has anything to do with the bucking/stuttering issues I have been having. If it was the FPS wouldn't it cause hot start problems?

1. No.
2. Yes.

 

[snailpwer]

is there a place that i could take the car so some one can do the drive cycle for me ?

i truely dont have the time right now to do that much

 

[gofer]

Time is money. If you want someone from a shop to drive around and beat the piss out of your DSM, paying them to do it, then you could probably find someone.

Drive it down here to SD and I'll give it a few drive cycles.

 

[snailpwer]

haha i may hit you up on that being im in sd all the time


I must say after working on N/A cars my whole life stepping into a turboed car is way out of my comfort zone and my car does have problems (boost leaks, fuel cut, cel ) all that fun stuff and im trying to meet people who know a lot and can physically help me.

 

[98EclipseTurbo]

Hey I just check the voltage coming out of the pcm connector and pcm itself with the ignition in the on position and have found out that :
Pcm pin voltage = 6.5 V
Pcm plug voltage = 7.7 V

I have already checked the operation and

The ecu/pcm is supposed to supply 12v out of the unit into the system, it is only supplying 7.7 V with a fully charged battery therefore it is defective ?

The connector has voltage of 6.5 V coming out of it, with the solenoid disconnected. I can see that voltage on both the connector at pcm and connector on the Fuel pressure solenoid.
Where is this power coming from, is there a short maybe and has caused a fault in the ecu?

Thank you in advance to those experienced or those who have useful information in regard to the subject

 

[98EclipseTurbo]

Si I get 6 volts out of the ecu all the way to the solenoid; 6 volt is not 12 volts therefore the ecu is bad ??

 

[98EclipseTurbo]

Im getting another used ecu, will let you know how it goes; I feel like I am talking to myself here

 

[Colt4G63 also]

That 12v you are looking for comes from the MFI relay, not the ECU, and supplies power to all four solenoids, the airflow sensor, the O2 sensor heaters, the IAC, the fuel injectors, the CKP sensor, the CMP sensor, and to pins 12 and 25 of the ECU.

What ECU pin are you testing?

EDIT: Pin 3 grounds the FPS, but there shouldn't be any others going to/from the ECU for that solenoid.