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#1
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hesitation when pressing gas pedal
Hi everybody. My SVX shows some hesitation when I press the gas pedal to change lane and pass somebody. This hesitation last 2 or 3 secs, after that, car pushes hard and show all the torque. Do yo think temperature going down may affect? Any ideas anybody? No CL. New air filter (K&N): no change.
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#2
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Re: hesitation when pressing gas pedal
Try cleaning the mass airflow sensor and getting on oem air filter.
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"The things you own end up owning you. It's only after you lose everything that you're free to do anything." 92 Pearl White Ls-l (138k) Euro Headlights & Blinkers, 97 Grill, Euro Tail Lights, SS Brake Lines, Stebro Exhaust, Slotted Rotors, Classic Registration 96 Legacy Outback (206k) 5-speed 2.2 Lightweight Crank Pulley, Group N Trans & Motor Mounts SOLD Wanted: Steering Wheel |
#3
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Re: hesitation when pressing gas pedal
news about this issue:
I´ve just verify that the hesitation is just until rpm´s get 2500rpm. from that point, the car push really hard. I suspect this is because of the firing advance. |
#4
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Re: hesitation when pressing gas pedal
Quote:
http://www.subaru-svx.net/forum/show...ght=bead+crush
__________________
1992 LSL ebony pearl 170k - Thank you Ron Mummert Reading Box of Wine Car ----------------------------------- 1992 SVX LSL 5-Speed Sold at 180K 2019 1995 SVX Lsi Polo Sold at 118K 2007 |
#5
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Re: hesitation when pressing gas pedal
Check for ECU Codes too.
http://www.svx-iw.com/svxiw/article/...php?article=78 btw: did anyone notice the first sentence in this doc? hint, transmission.
__________________
"The things you own end up owning you. It's only after you lose everything that you're free to do anything." 92 Pearl White Ls-l (138k) Euro Headlights & Blinkers, 97 Grill, Euro Tail Lights, SS Brake Lines, Stebro Exhaust, Slotted Rotors, Classic Registration 96 Legacy Outback (206k) 5-speed 2.2 Lightweight Crank Pulley, Group N Trans & Motor Mounts SOLD Wanted: Steering Wheel |
#6
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Re: hesitation when pressing gas pedal
I have no CEL on.
What is it "the old bead crush mode"? |
#7
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Re: hesitation when pressing gas pedal
There is a noise suppression bead on the ECU circuit board. The SVX had a hesitation issue when it was first sold, and the factory fix was to take a pair of pliers and crush that little bead. There's a thread on it, and a How-To page.
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Chris 92 Ebony Mica LS-L "A Rolling Restoration": 223,250 KM - Sleeping 2007 STi 6MT, Stance GR+ coilovers, PWR Rad, JDM hood badge, svxfiles 6000K HIDs, JDM Clear Corners, $15/15 min mod, $20/20 min mod, Energy Swaybar Bushings, Hella Supertones horns, Gold STi BBS rims, Group A lightweight crank pulley, A/C system removed, Custom header-back exhaust, Hybrid carbon/metal rear sway bar, restored headlights with CCFL halos 2008 Subaru Legacy Spec B - Diamond Grey Metallic - Sold 2020 Ram 1500 Longhorn - Red Pearl |
#8
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Re: hesitation when pressing gas pedal
Sean posted a link ^^^^
__________________
"The things you own end up owning you. It's only after you lose everything that you're free to do anything." 92 Pearl White Ls-l (138k) Euro Headlights & Blinkers, 97 Grill, Euro Tail Lights, SS Brake Lines, Stebro Exhaust, Slotted Rotors, Classic Registration 96 Legacy Outback (206k) 5-speed 2.2 Lightweight Crank Pulley, Group N Trans & Motor Mounts SOLD Wanted: Steering Wheel |
#9
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Re: hesitation when pressing gas pedal
Sorry that was supposed to read "mod" not mode. Damn smart phone.
__________________
1992 LSL ebony pearl 170k - Thank you Ron Mummert Reading Box of Wine Car ----------------------------------- 1992 SVX LSL 5-Speed Sold at 180K 2019 1995 SVX Lsi Polo Sold at 118K 2007 |
#10
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Re: hesitation when pressing gas pedal
it doesn't seem a problem they way you say it...mine is kinda the same
when you step on it in 4th, it can't push that hard so it waits to make sure you wanna go fast then downshifts and you'll be gone...process takes 1-2 secs! it's just the way most automatics are... again it might not be this but mine "hesitates" too!
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DIY FTW! 1993 SVX 25th Anniversary Edition @+142k -Rebuilt Tranny @135k -Regasketed Engine @140k -Enkei Raijin 18x8.5, with 255/35/18's @140k -BC racing Coilovers (From STI's) @142k |
#11
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Re: hesitation when pressing gas pedal
to David 12121: theres no kick down in the process... I´m in Power mode all the time. This hesitation is present in every gear but its more noticeable at 3rd or 4th or when cold, when you can feel almost three steps of torque improve before reaching the 2500rpm point, where it really pulls. When hot, only the 2500rpm piont is really noticeable. I would say its mapped on the chip...
to crazy pilot: so I have to remove the ECU, identify one resistor and crush it with a plier? is it the bead crush about? So I dont need to change the chip? Last edited by THE NEW GUY; 10-29-2011 at 11:06 PM. |
#12
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Re: hesitation when pressing gas pedal
Did you check to see if you have old codes stored? Sounds like you may have a sensor on it's way out.
__________________
"The things you own end up owning you. It's only after you lose everything that you're free to do anything." 92 Pearl White Ls-l (138k) Euro Headlights & Blinkers, 97 Grill, Euro Tail Lights, SS Brake Lines, Stebro Exhaust, Slotted Rotors, Classic Registration 96 Legacy Outback (206k) 5-speed 2.2 Lightweight Crank Pulley, Group N Trans & Motor Mounts SOLD Wanted: Steering Wheel |
#13
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Re: hesitation when pressing gas pedal
I did not have time to check stored codes but I did remove the throtle body and clean it deeply. bypass valve too. Control of iddle speed is way better now... but still hesitate. I've discard relations between hesitation and induction valve by confirming the operation of the induction valve in different moments of the hesitation. (vacuum meter connected to the induction solenoid). By the way, I've got to say that the induction valve does not activate the iris at speeds over 4200rpm's. As a matter of fact, the induction solenoid was activated only when the torque of the engine is very required at low rpms and stay on until you release the gas pedal or the engine reaches the exigency level demanded by the gas pedal. Tomorrow, I'll read stored codes and try to replace the O2 sensors.
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#14
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Re: hesitation when pressing gas pedal
Quote:
This system won't cause your problem. Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#15
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Re: hesitation when pressing gas pedal
Ok guys. I should check stored codes before posting this.
I have the following codes: 32: copilot's O2 sensor 37: pilot's O2 sensor 28: pilot's knock sensor (but is new, bought in amazon)) 14: injector 1 56: EGR valve (but I just replace the EGR plastic pneumatic valve and disassemble and clean all the system, and replace all the vacuum hoses) 23: MAF abnormal voltage I'll change the O2 sensors this week... then I'll let you know. Last edited by THE NEW GUY; 11-01-2011 at 08:15 AM. |
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