Causes For High Afm Signal Voltage?

[wlspn]

Hi all,

Recently dropped an RB25 in my R32 & since first start has never run right.

Is overfueling a stupid amount on idle, (7ms injector pulse width) to the point where it cant be driven due to the amount of smoke & hunting issues (due to mixture I believe...) Thanks to this has been off road for months!

Runs best (but still not perfect) when cold-started but as soon as throttle is touched, even slightly & released, starts pouring smoke & idling like a POS!

Unsure of AFM signal voltage when cold & running half decent but I know after throttle has been touched & its started really putting the fuel in that the AFM signal voltage is around 2v+ on idle!

Basically just want ideas of what could cause voltage to be so high?

This is obviously telling ECU more air is entering the engine than what actually is & is causing my problem...

Things I have tried so far include:

*Swapping AFM

*Swapping ECU

*Checking AFM wires for short-circuit

*Measuring resistance of AFM wires back to ECU plug (& ECCS relay)

*Checking battery output voltage

*Checking all earths (battery, body, engine, ECU, etc)

Probably some stuff that Ive missed but will add later...

In the meantime if anyone has anything to add please help me out!

Am even willing to pay for correct information...

Yes, if you solve my problem I will send you money!

[tridentt150v]

what happens if you leave the AFM disconnected???

[wlspn]

what happens if you leave the AFM disconnected???

Goes into limp mode, obviously, but otherwise is a lot better... Smoke clears up, stops hunting, etc

[mad082]

what ecu are you using? what afm? how did you buy the engine? reason i ask is that there is a posibilty that something isn't stock in the engine, such as injectors, which hasn't been taken into account.

also check the TPS voltage. if the tps is stuffed it will be sending a voltage to make the ecu think the trottle is open and therefor dumping in heaps more fuel than it needs to

[wlspn]

Standard R33 ECU & pink label AFM. Bought the whole R33 a few years ago, stock as a rock... Due to this am running all R33 sensors, etc

Also drove R33 when I first got it & it ran fine... Then pulled engine out, it sat around for a year or more, then dropped it in my 32...

Have checked TPS voltage, all good