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displaying posts 1 to 25 of 30
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| Author | Subject: 4000 rpm idle! |
 Rallyman
Junior User  Location: Glen Auldyn Registered: 04 Aug 2013 Posts: 67 Status: Offline |
Post #1
I'm back again, have had a year out of rallying and am hoping to compete again in March. Started the engine a week or so ago and the idle was 4000rpm. So did so research and cleaned the stepper motor. No change. If i block the inlet to the stepper motor housing the idle drops to about right. Also noticed today that the rev gauge has stopped working. Any ideas much appreciated. |
 Posted 15th Feb 2014 at 16:00
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armzsc6
Seasoned Pro  Location: Crowborough Registered: 22 Mar 2008 Posts: 3,445 Status: Offline |
Post #2
ICV stuck or throttle stuck somewhere or an air leak on the inlet somewhere. Is it a 6 engine? Cracked helmholtz resonator is not unheard of.________________________________________ Black power baby! SUUUUUPERCHARGED Seat Leon FR TDI 190BHP 300lbft daily gti-6 killer :p 12x 306's owned so far Cambelts, clutches, service work carried out on All makes and models, Peugeot Citroen / mitsubishi specialist. Pug planet / Citroen Lexia diagnostics / code reads available. |
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Posted 15th Feb 2014 at 16:14
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pete-gti
Seasoned Pro  Location: Kent Registered: 15 Feb 2009 Posts: 1,297 Status: Offline |
Post #3
Do a ecu reset then go from there :-) |
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Posted 15th Feb 2014 at 17:42
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Rallyman
Junior User Location: Glen Auldyn Registered: 04 Aug 2013 Posts: 67 Status: Offline |
Post #4
Thanks guys, input always appreciated.I have tried three different ICV and I have also followed Dom's ECU reset procedure. I will check for air leaks - are there any areas prone to failing? Also can you advise where the resonator is? Is this the bung at the bottom of the intake? Yes the car is a Rallye engine looks exactly the same as the other 6's I have had. |
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Posted 15th Feb 2014 at 17:59
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #5
Try removing the air intake pipe, then temporarily block the air inlet and ICV inlet. The engine should stall.If it doesn't then you've got an air leak.  ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone  |
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Posted 15th Feb 2014 at 18:04
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Rallyman
Junior User Location: Glen Auldyn Registered: 04 Aug 2013 Posts: 67 Status: Offline |
Post #6
Thanks Stan,I will try that now and post the result. |
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Posted 15th Feb 2014 at 19:51
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Rallyman
Junior User Location: Glen Auldyn Registered: 04 Aug 2013 Posts: 67 Status: Offline |
Post #7
Ok so I have tried Stan's suggestion as follows:1. Start engine - immediately revs to circa 4k 2. Covered air intake to the ICV and the revs immediately dropped to what sounded like a sensible tickover. 3. Covered the air intake into the throttle housing and the engine immediately stalled. So it looks like the issue is relating to the ICV - I have however tried three different ICV's all used but believed to be working. What's next. |
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Posted 15th Feb 2014 at 20:07
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #8
Adjust the throttle body housing so that you don't need to block it, and you can instead block the intake to the ICV and it stalls.The throttle butterfly should be completely shut at idle, with the only way of air getting in through the ICV. The fact that you've blocked the ICV off and the engine still runs until you block the throttle body tells me the throttle body is open slightly when it should be shut. Check the throttle cable isn't keeping the butterfly open, and providing it isn't then adjust the butterfly itself (screw on throttle body). ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 15th Feb 2014 at 20:10
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Rallyman
Junior User Location: Glen Auldyn Registered: 04 Aug 2013 Posts: 67 Status: Offline |
Post #9
Ok - so I have checked the throttle position and have totally removed the cable. The butterfly shuts fully and cannot be moved more into the closed position. However problem persists. When ICV blocked idle is perfect. When not revving wildly. Could this be a wiring issue or perhaps the ECU reset not correct? |
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Posted 15th Feb 2014 at 20:21
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Rallyman
Junior User Location: Glen Auldyn Registered: 04 Aug 2013 Posts: 67 Status: Offline |
Post #10
Any thoughts on this guys? I've hit a deadend on this nowRallyman has attached the following image: |
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Posted 17th Feb 2014 at 21:44
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pete-gti
Seasoned Pro Location: Kent Registered: 15 Feb 2009 Posts: 1,297 Status: Offline |
Post #11
How did you do ecu reset? |
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Posted 17th Feb 2014 at 21:46
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Rallyman
Junior User Location: Glen Auldyn Registered: 04 Aug 2013 Posts: 67 Status: Offline |
Post #12
Hi Pete, I followed Doms guide, Ten minutes disconnect of battery, 10 seconds ignition on 2 and then start and turn everything on |
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Posted 17th Feb 2014 at 21:47
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pug_306
Seasoned Pro  Location: Great Hockham Registered: 28 May 2013 Posts: 1,592 Status: Offline |
Post #13
Have you checked for air leaks? If the flap is shut and its revving that high it must be sucking in air before the throttle body________________________________________ 1998 Supercharged White Rallye1992 205 GTi6 205 Turbo 340bhp |
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Posted 17th Feb 2014 at 22:01
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Rallyman
Junior User Location: Glen Auldyn Registered: 04 Aug 2013 Posts: 67 Status: Offline |
Post #14
Which one? |
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Posted 17th Feb 2014 at 21:52
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #15
Your throttle body is open slightly, this is 100% the problem.You've proved the point by blocking the ICV intake and the engine still runs until you block the throttle body intake. The throttle body intake should be fully shut, leaving only the ICV intake open to allow air for idling. This clearly isn't the case. ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 18th Feb 2014 at 01:15
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Rallyman
Junior User Location: Glen Auldyn Registered: 04 Aug 2013 Posts: 67 Status: Offline |
Post #16
Thanks Stan, I will try changing the throttle body, perhaps the butterfly is bent as I have undone the adjustment screw so that it is mot making contact with the black plastic connection on the top. if twisted shut by had it gets caught on something and then when you open it there is a little click. I have just tried starting the car and it started ticking over at the right sort of revs but within 10 seconds it was up again. It seemed to be less but still higher than before. |
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Posted 18th Feb 2014 at 20:00
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Rallyman
Junior User Location: Glen Auldyn Registered: 04 Aug 2013 Posts: 67 Status: Offline |
Post #17
Ok, so update on situation.This evening I have changed the throttle body. I have cleaned and sealed the mating surfaces and installed a replacement. Having cleaned the removed throttle body it seems it was my photographing skills that were misleading and the butterfly appeared to be fully closed. I sprayed carb clean on it and it held it as a pool also. So I carried out the same tests as before: I blocked the ICV and the engine stalled immediately. I therefore assume that this means that the butterfly is fully closed? So by my logic this seems to indicate that there is something wrong with the ICV or its control. Given that this is the third ICV I imagine that the issue is its control? Any further ideas? Are there any tests that I can carry out to prove the ICV works or that the wiring to it is good? |
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Posted 18th Feb 2014 at 20:44
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pete-gti
Seasoned Pro Location: Kent Registered: 15 Feb 2009 Posts: 1,297 Status: Offline |
Post #18
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Posted 18th Feb 2014 at 20:54
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Rallyman
Junior User Location: Glen Auldyn Registered: 04 Aug 2013 Posts: 67 Status: Offline |
Post #19
Thanks Pete, I will test now |
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Posted 18th Feb 2014 at 21:24
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Rallyman
Junior User Location: Glen Auldyn Registered: 04 Aug 2013 Posts: 67 Status: Offline |
Post #20
Ok Tested all three units and ALL are less that 52ohms, ranging from 48 - 50 ohms, I guess the steppers I have tried are all knackered! Before I part with £60 is there anything else I should check first? |
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Posted 18th Feb 2014 at 21:36
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pete-gti
Seasoned Pro Location: Kent Registered: 15 Feb 2009 Posts: 1,297 Status: Offline |
Post #21
Sounds like that's your problem |
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Posted 18th Feb 2014 at 22:44
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pete-gti
Seasoned Pro Location: Kent Registered: 15 Feb 2009 Posts: 1,297 Status: Offline |
Post #22
I have a brand new icv for sale , in the parts for sale |
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Posted 18th Feb 2014 at 22:45
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #23
Before you do but a new ICV, just visually check the loom running to it for damage.I suspect the ICV is at fault, but it's worth checking that first. ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 19th Feb 2014 at 07:13
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Rallyman
Junior User Location: Glen Auldyn Registered: 04 Aug 2013 Posts: 67 Status: Offline |
Post #24
Thanks Stan, I will try that as well. Is the rev counter not working likely to be related or a totally different item? |
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Posted 19th Feb 2014 at 09:45
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pete-gti
Seasoned Pro Location: Kent Registered: 15 Feb 2009 Posts: 1,297 Status: Offline |
Post #25
Yea that want be related Double check and if it is your icv I have one new 25 pound posted :-) |
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Posted 19th Feb 2014 at 18:50
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