Throttle "blip" at start-up....?
Discussion
Mines the same as yours, should it blip the throttle all by itself?
When I got mine the dealer told me to blip the throttle (purge) a couple of times as the car won't run properly (something to do with flooding the lambda sensors with fuel on start-up) for a mile or so afterwards, but I find starting it, letting it idle for a few seconds and then off works fine.
When I got mine the dealer told me to blip the throttle (purge) a couple of times as the car won't run properly (something to do with flooding the lambda sensors with fuel on start-up) for a mile or so afterwards, but I find starting it, letting it idle for a few seconds and then off works fine.
I noticed that if I fire the chimaera up from cold, then try to pull off (steady, lads!) straight away, when I depress the accelerator the revs drop to 500rpm momentarily before climbing, so if I engage the clutch then it can stall! however if I idle for few seconds before pulling off its less likely to do this.
I find that if I stall within that period then I can't restart for about 15-20 secs. Very scary if it happens on the road, but fortunately usually only catches me out on the driveway which is merely embarrassing rather than dangerous. 
>> Edited by JonRB on Thursday 24th October 12:28
>> Edited by JonRB on Thursday 24th October 12:28
15-20 seconds? Hmm, Lucky You!!
In the past year I have only managed to stall once on start up. On my Griff that seems to mean waiting about 15 minutes.
Technobabble is all about unburnt fuel into exhaust - lambda sensor tells the ECU - ECU does what it's told and won't start. Then you have about 20 miles of ECU sulking, wanting to run away on idle, wanting to stall et cetera.
So, the one time I managed to do it? The day I promised to take a bride to her wedding - and I was already running ten minutes late. My mate in his Chimaera had been parked up next to me and warmed his engine up for ten minutes. We both had an awkward back-out-onto-a-little-country-lane-on-a-hill-job.....
DOH!!!!!!!
In the past year I have only managed to stall once on start up. On my Griff that seems to mean waiting about 15 minutes.
Technobabble is all about unburnt fuel into exhaust - lambda sensor tells the ECU - ECU does what it's told and won't start. Then you have about 20 miles of ECU sulking, wanting to run away on idle, wanting to stall et cetera.
So, the one time I managed to do it? The day I promised to take a bride to her wedding - and I was already running ten minutes late. My mate in his Chimaera had been parked up next to me and warmed his engine up for ten minutes. We both had an awkward back-out-onto-a-little-country-lane-on-a-hill-job.....
DOH!!!!!!!
hehe sod's law eh!
this thread reminds me... when winter sets in starting can be even more fun... when it's just started it can be even more touchy than normal and if it stalls it does take a while to start again... just have to wait for the fuel to drain from the engine cos the ECU overfuels. Or something similar.
this thread reminds me... when winter sets in starting can be even more fun... when it's just started it can be even more touchy than normal and if it stalls it does take a while to start again... just have to wait for the fuel to drain from the engine cos the ECU overfuels. Or something similar.
MikeyT said: I just reach into the car, turn the key and it starts, no throttle nothing.
I then open the garage doors, peg 'em back etc and shut the gate etc while it burbles away merrily in the garage until I climb in.
It has never stalled upon start-up luckily.
Ditto, esp after my injectors been cleaned
starts the instant i turn the key, ie not 1 sec later after a mini churn, as i turn the key, she is on... magic
like its electric :P MikeyT and Jamie - yes ditto - this is a great way of starting your chim & means you rarely (if ever) run out of the 15 second window for the immobiliser too. Can I make one modification to our shared technique, however? - check you didn't leave it in gear last night by accident first.... tap your knob to the left before turning on (couldn't resist it 
). cheers, Tant
). cheers, TantSorry to stifle an interesting debate, but you've all got the wrong end of the stick.
I'm trying to describe the rise in revs and fall to idle that the car is supposed to automatically do on turning the key...i.e. without the driver touching the loud pedal. Mine used to burst into life with the tacho registering (say) 2000rpm and then that used to fall away to normal idle as (I assumed) the stepper closed (or opened...whatever). Now it still starts without me touching the throttle but that routine is not as pronounced or as crisp. Phew....
I'm trying to describe the rise in revs and fall to idle that the car is supposed to automatically do on turning the key...i.e. without the driver touching the loud pedal. Mine used to burst into life with the tacho registering (say) 2000rpm and then that used to fall away to normal idle as (I assumed) the stepper closed (or opened...whatever). Now it still starts without me touching the throttle but that routine is not as pronounced or as crisp. Phew....
Yikes Pupp - that IS bursting into life. I would've thought going straight to 2000 rpm 
was not a specially desirable feature in any case on a totally cold V8? Mine goes to 1200, then settles to 923 (sorry to be so accurate but I've just had me emissions done!!). I think 'good riddance' would be my first reaction to your blip scenario. Unless it's my car that's the odd one out...anyone else? cheers Tant
was not a specially desirable feature in any case on a totally cold V8? Mine goes to 1200, then settles to 923 (sorry to be so accurate but I've just had me emissions done!!). I think 'good riddance' would be my first reaction to your blip scenario. Unless it's my car that's the odd one out...anyone else? cheers Tant
Can I make one modification to our shared technique, however? - check you didn't leave it in gear last night by accident first.... tap your knob to the left before turning on (couldn't resist it
Not been caught out yet, but if I make the mistake I'll get a b*ll*cking cos it'll run over me son's bike!
I'll check what the initial rev rise is next time I start it. Not noticed before.
Yeah,
mine (Chimaera 450 1997) goes up to about 2000 revs n'all...and yes I am worried about what that's doing to a cold engine. Try to hold it back by slipping the clutch a little but as soon as clutch dipped to change out of reverse, 1st-2nd etc its on its way back up to 2000 odd again. Sometimes it keeps this up for a good minute or so of driving. Other times it doesn't but then nearly stalls on 1st application of throttle - goes off down to around 500rpm. Penninsula said they thought it was sticky stepper and supposedly cleaned it out - maybe they didn't get round to it after all?
Matthew
mine (Chimaera 450 1997) goes up to about 2000 revs n'all...and yes I am worried about what that's doing to a cold engine. Try to hold it back by slipping the clutch a little but as soon as clutch dipped to change out of reverse, 1st-2nd etc its on its way back up to 2000 odd again. Sometimes it keeps this up for a good minute or so of driving. Other times it doesn't but then nearly stalls on 1st application of throttle - goes off down to around 500rpm. Penninsula said they thought it was sticky stepper and supposedly cleaned it out - maybe they didn't get round to it after all?
Matthew
My 450 starts up as normal at 1000ish rpm, but by the time I get to the end of the road the revs have increased to 2000 rpm. It falls back to normal after about 1 mile, it still idles a little high even after a 20 mile journey, I have taken the stepper motor out twice now and cleaned it.
What would be the next step ?
Malc
What would be the next step ?
Malc
Mine does this too at start-up and if it does stall it won't start again for a while (I assumed it had flooded itself). Once it does start, you get clouds of black petrol smoke (I guess its burning off the excess fuel).
It's a happy car if I start it up and leave it ticking over for a while before I drive off though. As soon as it warms up a bit its all fine!
It's a happy car if I start it up and leave it ticking over for a while before I drive off though. As soon as it warms up a bit its all fine!
Can also be sticky throttle butterfly or throttle pot. Butterfly gums up and lets air bleed through. Throttle pot confuses the hell out of the ECU.
Steve
www.tvrbooks.co.uk
Steve
www.tvrbooks.co.uk
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