High idle - 2008 Atom 3
High idle - 2008 Atom 3
Hi all,
I’m hoping for some help with a high idle on a Ariel Atom 3 (supercharged with FBW).
After a spirited drive on a hot day, I noticed my idle sitting at approx 1850rpm.
The pedal looks straight and is not bent. If I remove the TPS, the revs drop to circa 1250rpm and it starts to become abit more lumpy on idle.
I’ve had a look at throttle body and all looks visually ok with the item removed from engine.
I’m not sure where the OBD port is either, if any.
Any ideas?
I’m hoping for some help with a high idle on a Ariel Atom 3 (supercharged with FBW).
After a spirited drive on a hot day, I noticed my idle sitting at approx 1850rpm.
The pedal looks straight and is not bent. If I remove the TPS, the revs drop to circa 1250rpm and it starts to become abit more lumpy on idle.
I’ve had a look at throttle body and all looks visually ok with the item removed from engine.
I’m not sure where the OBD port is either, if any.
Any ideas?
Re: High idle - 2008 Atom 3
Hi,
I’d defo check the odbc it’s hidden in front of the gear selector cables tight on the firewall and usually fitted with a dust cover. Failing that, I’d check for air leaks on the intake side or maybe a loose vacuum hose etc..
Hope you find something!
I’d defo check the odbc it’s hidden in front of the gear selector cables tight on the firewall and usually fitted with a dust cover. Failing that, I’d check for air leaks on the intake side or maybe a loose vacuum hose etc..
Hope you find something!
Re: High idle - 2008 Atom 3
Also check you have coolant and make sure there are no leaks etc....
Re: High idle - 2008 Atom 3
Thanks!
No fault code.
No coolant leaks - I’ve never seen a minor coolant leak effect idle?
No fault code.
No coolant leaks - I’ve never seen a minor coolant leak effect idle?
Re: High idle - 2008 Atom 3
Coolant - just to check if you have some, a minor leak is not likely to be an issue if the car isn't overheating...
What's the TPS percentage look like when you move the throttle but don't have the engine running? (should see the number sweep along with the amount of pedal etc)
Worth checking to see if you can hear the throttle body motor moving smoothly? - it's possible the throttle body stepper is bad, someone else on here had a similar issue.
Other than that - take it to Ariel or a Honda garage for the once over?
What's the TPS percentage look like when you move the throttle but don't have the engine running? (should see the number sweep along with the amount of pedal etc)
Worth checking to see if you can hear the throttle body motor moving smoothly? - it's possible the throttle body stepper is bad, someone else on here had a similar issue.
Other than that - take it to Ariel or a Honda garage for the once over?
Re: High idle - 2008 Atom 3
Hey, I’m not really sure about % as my obd tool is cheap. It says 9.8% though? Do you have a obd that you would recommend?
Throttle body is weird. If I turn ignition on, push pedal all the way down, there’s an electrical noise coming from throttle body that stays on for about 5 seconds after letting off throttle? It definitely opens and closes and is slightly open at its resting position.
Throttle body is weird. If I turn ignition on, push pedal all the way down, there’s an electrical noise coming from throttle body that stays on for about 5 seconds after letting off throttle? It definitely opens and closes and is slightly open at its resting position.
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Re: High idle - 2008 Atom 3
Isn't that noise just the fuel pump priming?
Probably the Throttle Position Sensor above the pedal but some have found that disconnecting the battery for about 10 minutes has reset the problem - worth a try?
Probably the Throttle Position Sensor above the pedal but some have found that disconnecting the battery for about 10 minutes has reset the problem - worth a try?
Atom 3 310 Supercharged (2011), Now Sold
Re: High idle - 2008 Atom 3
[mention]Aterro[/mention] - that’s the same as mine, the throttle body motor pwm whine stays for a few seconds when the butterfly closes. That’s normal as far as I’m aware, not to be confused with the pretty loud prime from the fuel pump, it’s much more high pitched. My ODBC dongle is nothing special, just a Bluetooth dongle that connects to my phone.
If it’s nothing obvious, I’d have a word with the factory and see what they advise - interested to know how you get on!
If it’s nothing obvious, I’d have a word with the factory and see what they advise - interested to know how you get on!
Re: High idle - 2008 Atom 3
Hey all.
TPS came slightly loose, doh. All ok.
TPS came slightly loose, doh. All ok.
Re: High idle - 2008 Atom 3
Nice - glad you got it fixed!
- flying phil
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Re: High idle - 2008 Atom 3
Had a spirited drive against a 3.5R. High idle the rest of the day. Turned out I had hit the accelerator so hard it had bent the bracket. Easily fixed/
Ariel Cub Member since March 2008 - 2000 Honda Odyssey, 2009 Ariel Atom 3 300, 2014 Ram 3500 Dually, 2017 BMW 340I x-drive, 2018 Dodge Durango SRT
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