997.2 Delay when starting car?
08-26-2011, 08:14 PM
#16
Rennlist Member
Thread Starter
After the clutch switch was replaced I didnt have this delay issue any longer. I guess it was a delay in the switch not allowing the engine to start due to the faulty switch.
The HPFP issue was resolved after it was replaced.
The HPFP issue was resolved after it was replaced.
02-12-2013, 02:08 PM
#18
Addict
Rennlist Member
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My 06 .1 does it also but might be the starter cable,not one of three batteries.
02-12-2013, 05:04 PM
#19
Drifting
Does anyone have a near one second delay when starting the 997.2?
I noticed the time appears to get longer and longer between my startups. I turn the key completely to the right but my car has a delay before starting. It doesnt matter whether the A/C, radio or any other electronics is on or off when I start the car. I have really started to notice this more than usual and wondered if this is normal on this particular model. I can't recall my other cars having this issue except my 928S. However, the ignition switch screws were loose in that one and I eventually tightened those again.
I noticed the time appears to get longer and longer between my startups. I turn the key completely to the right but my car has a delay before starting. It doesnt matter whether the A/C, radio or any other electronics is on or off when I start the car. I have really started to notice this more than usual and wondered if this is normal on this particular model. I can't recall my other cars having this issue except my 928S. However, the ignition switch screws were loose in that one and I eventually tightened those again.
Modern day engine control systems make liberal use (IACV, EGR valves, cruise control, even throttle plate positional control) of relatively inexpensive stepper/pulse type servomotors, most of them operating in "open Loop" mode.
Stepper motors, "pulse" servomotors, must be calibrated/normalized each time the power is restored, or in the alternative before the power is switched off so when power is restored they are in a KNOWN position. Some of these have only "end stop" positional feedback
Disconnect your battery in a quiet environment and now when you reconnect listen to all the engine compartment servomotors normalizing, recalibrating.
02-12-2013, 07:59 PM
#20
8th Gear
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I had the same problem with my 06 997.1 with the "depress clutch pedal" message. It got worse and worse. I changed the clutch pedal switch ($15) and still had the same problem. Took the car to the dealer and they changed the "neutral switch" This is in the same circuit so the message is the same as the clutch pedal switch. Haven't had the problem since.
02-12-2013, 08:18 PM
#21
Addict
Rennlist Member
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Thanks
02-12-2013, 08:41 PM
#22
Three Wheelin'
My 997.1 is slow as well (cranks for two seconds before firing), just changed battery (still had original) and there was improvement. My trouble is, start car, run, stop, try to restart immediately and no luck. Wait 30sec, then restart and no issue. This is better now with new battery. My 996 starts much faster. I think I may have a fuel delivery issue as well , ie pump or filter.
02-13-2013, 12:12 AM
#23
My 1995 LS400 "normalizes" the various ECU engine control servomotors, often stepper motors, operating "open" loop, each time I switch the car off. The impression I get from the starting operation of my 996 C4 is that only happens once I move the key to START.
Modern day engine control systems make liberal use (IACV, EGR valves, cruise control, even throttle plate positional control) of relatively inexpensive stepper/pulse type servomotors, most of them operating in "open Loop" mode.
Stepper motors, "pulse" servomotors, must be calibrated/normalized each time the power is restored, or in the alternative before the power is switched off so when power is restored they are in a KNOWN position. Some of these have only "end stop" positional feedback
Disconnect your battery in a quiet environment and now when you reconnect listen to all the engine compartment servomotors normalizing, recalibrating.
Modern day engine control systems make liberal use (IACV, EGR valves, cruise control, even throttle plate positional control) of relatively inexpensive stepper/pulse type servomotors, most of them operating in "open Loop" mode.
Stepper motors, "pulse" servomotors, must be calibrated/normalized each time the power is restored, or in the alternative before the power is switched off so when power is restored they are in a KNOWN position. Some of these have only "end stop" positional feedback
Disconnect your battery in a quiet environment and now when you reconnect listen to all the engine compartment servomotors normalizing, recalibrating.
02-13-2013, 12:22 AM
#24
My 997.1 is slow as well (cranks for two seconds before firing), just changed battery (still had original) and there was improvement. My trouble is, start car, run, stop, try to restart immediately and no luck. Wait 30sec, then restart and no issue. This is better now with new battery. My 996 starts much faster. I think I may have a fuel delivery issue as well , ie pump or filter.
To get my car going I have to remove my foot from the brake pedal and press my foot down on the brake pedal again and hold, then turn the key as usual. At that point my car will start.
So, I am wondering if there is some type of switch that isn't registering the action and as a result I have to press the brake pedal twice before the car starts. Again, I have a PDK vs a manual. So, I don't know what is different there, but I would like to get to the botton of this.
02-13-2013, 09:30 AM
#25
I had the same problem with my 06 997.1 with the "depress clutch pedal" message. It got worse and worse. I changed the clutch pedal switch ($15) and still had the same problem. Took the car to the dealer and they changed the "neutral switch" This is in the same circuit so the message is the same as the clutch pedal switch. Haven't had the problem since.
Anybody ever remove their clutch switch and jump it out? You can do this in the 993, makes life a little easier.
