Idle and stalling
Discussion
Hi Guys,
To be honest its always been like it...but i cant help but think it shouldnt be!
Once hot, my car will stall if i dont feather the throttle. Most of the time it will be fine, but once i slow down and the fans warm all the air under the bonnet it will slow right down and stall.
Is there something which isnt right?
Ive got used to it but its very annoying if anyone else drives it (rare) as they stall it all the time when parking or moving in traffic...
To be honest its always been like it...but i cant help but think it shouldnt be!
Once hot, my car will stall if i dont feather the throttle. Most of the time it will be fine, but once i slow down and the fans warm all the air under the bonnet it will slow right down and stall.
Is there something which isnt right?
Ive got used to it but its very annoying if anyone else drives it (rare) as they stall it all the time when parking or moving in traffic...
These cars have high performance engines and as such need to be tuned properly. Ideally a rolling road tune. You pay the money once and will get years of peak performance and maximum economy that can only be acieved by a professional with the right equipment and knowhow. You won't believe its the same car when you drive it. That's how much it'll change. No stall, no hesitation and superb performance.
Tony. TCB.
Tony. TCB.
I think that you need to do is set the base idle. Try the following..
Switch the ignition on - DO NOT START THE VEHICLE.
Disconnect the stepper motor plug.
Switch ignition off.
Listen for click from ECU main relay
Reconnect the stepper motor plug.
Switch the ignition on - DO NOT START THE VEHICLE.
Disconnect the stepper motor plug.
Start the vehicle in neutral without touching the accelerator.
Adjust the base idle speed with a 3/16" Hex wrench to 550 to 650 RPM by turning the base idle screw. Turning counter clockwise will raise the speed and vice versa.
Reconnect stepper motor plug.
Switch ignition off.
WAIT for main relay click.
Switch ignition on, start the engine and rev briefly to 2000 RPM.
Idle speed should stabilize at 665-735 RPM.
Switch the ignition on - DO NOT START THE VEHICLE.
Disconnect the stepper motor plug.
Switch ignition off.
Listen for click from ECU main relay
Reconnect the stepper motor plug.
Switch the ignition on - DO NOT START THE VEHICLE.
Disconnect the stepper motor plug.
Start the vehicle in neutral without touching the accelerator.
Adjust the base idle speed with a 3/16" Hex wrench to 550 to 650 RPM by turning the base idle screw. Turning counter clockwise will raise the speed and vice versa.
Reconnect stepper motor plug.
Switch ignition off.
WAIT for main relay click.
Switch ignition on, start the engine and rev briefly to 2000 RPM.
Idle speed should stabilize at 665-735 RPM.
matt-man said:
Dont have an issue paying someone for a set up but all you have on a flapper is timing and idle...unless im missing something?
I'm afraid there is a little more to it than that. There's the fuel pressure, ignition amplifier, distributor weights, ignition leads, coil, spark plugs, fuel pump and the list goes on. If any one of these are not functioning as they should, the problem is magnified. With the right equipment and someone in the know, all we be revealed and rectified, then tuned. You'll be surprised what these cars can do in peak tune and firing on all cylinders.Alternatively, you can be substituting this, changing that, banging your head on the wall and still not getting anywhere. It's your call!
Tony. TCB.
Idle is about 1150 until warm then about 950...
As I said, happy to get it tweaked...it goes really well and as you all know, I put a lot into this car so not frightened of putting money in it! I would have given up a long while ago if that was the case!
Its fine normal driving, mainly traffic thats the challenge.
As I said, happy to get it tweaked...it goes really well and as you all know, I put a lot into this car so not frightened of putting money in it! I would have given up a long while ago if that was the case!
Its fine normal driving, mainly traffic thats the challenge.
OK that is high enough.
As Tony says it's a long list, but best to start with the usual.
Stuff that's free: clean the earth straps up, check for air leaks, blow down the vent pipe from the flame trap, the engine should pressurise like a balloon.
Then set up the throttle gap, and the TPS closed voltage = 0.325V.
Set the idle mixture to around 1% CO.
While it's idling, check the battery voltage - 13V is healthy. If it drops down, there will be extra drag via the alternator. (I put a new alternator on mine and since then it idles much better too...)
That little lot should keep you busy this evening...
As Tony says it's a long list, but best to start with the usual.
Stuff that's free: clean the earth straps up, check for air leaks, blow down the vent pipe from the flame trap, the engine should pressurise like a balloon.
Then set up the throttle gap, and the TPS closed voltage = 0.325V.
Set the idle mixture to around 1% CO.
While it's idling, check the battery voltage - 13V is healthy. If it drops down, there will be extra drag via the alternator. (I put a new alternator on mine and since then it idles much better too...)
That little lot should keep you busy this evening...
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