Blow Off Valve Is Causing Car To Stall!

[Dose Pipe Sutututu]

1 hour ago, joshuaho96 said:

get a lean spike instead of a rich spike as the MAF double-counts the airflow.

You mean a rich spike, as the air has been metered multiple times due to the turbulent air, you end up injecting more fuel causing a momentary dip in torque and quite possibly a stall event.

TL;DR, install a Haltech Elite or S3 or R3, convert to DBW, throw all ancient shit into the bin and enjoy the car.

[Kinkstaah]

If the BOV is plumbed in as mentioned, like stock.... why exactly would it stall? It'd be like stock. Do stock cars stall with stock bovs?

[silviaz]

19 hours ago, joshuaho96 said:

If you block off the BOV entirely you will get reversion out of the MAF and get a lean spike instead of a rich spike as the MAF double-counts the airflow.

Hmm that sounds pretty bad lol. So that applies for all cars right even the s15's that have the bov blocked off?

[silviaz]

18 hours ago, Dose Pipe Sutututu said:

You mean a rich spike, as the air has been metered multiple times due to the turbulent air, you end up injecting more fuel causing a momentary dip in torque and quite possibly a stall event.

TL;DR, install a Haltech Elite or S3 or R3, convert to DBW, throw all ancient shit into the bin and enjoy the car.

I don't need a rich spike. I'm still blowing black smoke after my tune when flooring it lol. I wonder if a jammed actuator has anything to do with it

Edited November 4 by silviaz

[joshuaho96]

On 11/3/2024 at 3:42 AM, Dose Pipe Sutututu said:

You mean a rich spike, as the air has been metered multiple times due to the turbulent air, you end up injecting more fuel causing a momentary dip in torque and quite possibly a stall event.

TL;DR, install a Haltech Elite or S3 or R3, convert to DBW, throw all ancient shit into the bin and enjoy the car.

Right, not sure why I thought it to be a lean spike. It might be fixable with modern card-style hot film MAFs which have some design features to avoid counting reversion flow but I've never tried it myself.