Stalling issue after turboed
 

I just put turbo on last week. The car stall on me whenever i slowing down. I have to leave the car in gear until the car almost stop, otherwise the car will stall. I thought I was running too rich and i went to the shop to tune it today, and it still stalls. BTW, I have rsx s injectors and safc with return setup. Anybody has an idea what could cause this? Could it be the spark plug? thx

The bleed hole in the check valve for the MAP sensor could be too small (if you have a check valve).

Or your initial fuel pressure may be too high.

I set my fuel pressure at 50 psi and i don't have check valve.

ahh lets see you might check your vaccum lines, that would cause a stall, turboengnr has a point check the fuel presure but that would be the only thing that would cause a stall that i know of other then a boost leek. if you have a boost guage make sure it go's into boost and dosent go up and down.

50 psi shouldnt be too high. Stock is somewhere between 40 and 45 psi. Mine happened to be 42. But an extra 8 psi shouldnt hurt anything, unless your idle tuning it a bit too rich. Check your fuel map in the high vaccum section (25-30 in/hg). If it is left stock, then it will have a very hard time coming down to idle. With the extra 8 psi and the stock fuel map, it will be extremely rich with the larger injectors.

what he said ^^^^

At idle, the correction setting on safc2 is -%30. I shouldn't stall the car with this setting ideally. It is just weird.

do you have a check valve?

i would suggest double checking the wiring on the SAFC. i had a similar problem.

I am positive safc2 is working otherwise the shop can't tune it. Im hoping spark plug will change it since my friend's rsx s turbo has the same problem and he told me changing the spark plug will make it better.

how is your vacuum?

Are you sure the spark plugs are the right ones? This also happened to me because i accidentally bought and installed the wrong spark plugs

try iriduim plugs, and do check vacuum hoses. i have stalled out in n/al cars cause of leaking or lack of vacuum hoses in the car. other than that your manifold absolute pressure could be too low. ill let ya know if i can think of anything else.

I am going to buy some ik20 this weekend, i will tell you guys how it goes.

Same problemmmI will try to change the plugs...
Also, I you guys have IK20 plugs for turbo...then you should be ok with OEM ones, per Denso website IK20 are specs for a stock car....
But I think IK22 should do better

I changed my sprak plugs last weekend. The stalling issue is still there. I am thinking my iac valve might be the problem since I did auto to mannual swap and i still have auto iac valve on it. The part number for mannual iac valve and auto iac valve is different from honda. Hope that is the problem.

Do you have a CEL?

Yeah, I scan code. it is "system too rich". The CEL comes and go.

Hey, did you get it fixed?
I have same problem, I installed colder plugs BOSH Platinum (single electrode) +2 to original specs...
When not warmed up, idle struggles between 600-900 rpm, but when warms up idle doesnt stay. To start a car need to use gas, vacuum is about -30 at idle (normal?).. :shrug: :help:
You guys keep saying to check vacuum hoses, but which ones? :help:
I only know about two (I will attach pic later)...
I did not have chance to put premium gas, I have 87 now, but can gas octane cause stalling problem? :help:

pls help!

Yopur need to run at least 91, or else you are detonating super bad =*(

Thats for sure, I did not take car out from garage yet..but I will put Sunoco 94, cause I have about 1/2 tank of 87.

But will 87 octane keep engine stalling, I dont think so? I :shrug:

the problem is still there

Is it fixed?
I have same problem.

Be careful with that half tank of regular, stalling with be the least of your problems!!!

:)
Yeah, I already mixed it with Sunoco 94, no the gas octane is at least 91 now, but stalling persists

Its not the spark plugs. Check the wiring or your tune.

Is you IAT sensor installed

Yes it is.
I'm done through basics with this problem.
Vacuum hoses - proper diamer, plugs Bosh Platinum 8 (2 steps colder thaen stock Denso 20)

I think whatever sieetings I have - I run RICH AS HELL - SPARK PLUGS TIPS ARE BLACK. I think something tells ECU to dump extra fuel. I cant figure out what it is.

Also, why on the bottom of the TB, on a side of the butterfly, there is a hole and a little other hole, they seem like to conncet to intakemanifold and have a separate lille chamber thats connected with the main intake manifold by hole.

These chamber and hole in TB do not line up. can this cause an idle / rich mixture problem?
BTW, by TB is dirty as s-h-i-t, covered with kind of black powder - looks like RICH mixture thing...
MAF? TB holes? O2 sensor?

My IAT is not plug in, but i don't think that will make the car to stall