Stalling between gears.

[Kevin TSI]

Ok I am looking at a 93 talon tsi. Here is a list of the mods.

6 bolt
b/s removed
new rebuilt head with cometic gasket and arp studs
new comp 101 cams
pte 680cc injectors
johnnyracecar IC
homemade IC tubing
2nd gen MAS
Dejon Intake
Hahn S20g turbo
S-AFC 2
Datalogger
Fidanza Flywheel alum
TRE performance tranny
ACT 2600
autometer guages
aeromotive afpr
255 walbro
new d/s front cv axle
thermal catback 3in
megan 3in downpipe

It is stalling between gears and also when I was coming to a stop. It does it every time so I don't think it is just because of the flywheel and cams. Could it be the CAS, bad battery connection or something else? I am going back to look at the car again but I need to know what to look for when I go.

 

[x3whlmotion240]

hmmm..if not bov...have u tested the tps? with scan tool and make sure its putting out correct "graph"...i say tps because sometimes when u left off the pedal the tps will just cut out as soon as the throtle plate closes and thats causes ## stalls?

 

[steve]

i didnt have time to do much today but i double checked the CEL on a analog multimeter and read 3 long sweeps and 1 short (31) also i went to the S-AFC settings in the knock sum under idle its from like between 60-90ish. Im not thinking this is knock count is it?? thx ken

Thanks for double checking.

How long have you had the SAFC connected to the knock sensor?
It doesn't read the same as what the ECU has for knock count.

The ECU has the advantage of knowing where the pistons are in their stroke and can ignore the time when there isn't an (pre)ignition event possible. The SAFC only hears noise and has a sample that you trained it for. It compares the sample with the current sounds and decides if it hears knock.

There might be some useful information if you study the SAFC output long enough but it didn't seem worth the trouble to hook the wire up to me. I also wasn't sure it wouldn't load the knock sensor and cause it to distort the signal to the ECU like the blue wire does to the O2 sensors if you hook it up.