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M-m

Idle Speed Setting

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GlennyGills
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Idle Speed Setting

Postby GlennyGills » Tue Jan 05, 2016 1:50 pm

I tried to reset my idle speed over the weekend. I connect TEN and Ground (S/GND ??) in the diagnostics box, and immediately the idle speed drops by approx. 100 rpm. I then set the idle to around 850RPm and remove the jumper and the idle speed jumps up approx. 100rpm. This happens every time I fit the jumper. In the end I adjusted the idle with jumper to a very rough idle and remove jumper to get a reasonable idle speed guessing 900+ rpm. Is it normal to get the idle speed change in fitting and removing the jumper in the diag box?
'96 Gleneagles MeisterR Coilovers - engine bling stainless mx5parts full exhaust
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Mazda Mender
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Re: Idle Speed Setting

Postby Mazda Mender » Tue Jan 05, 2016 4:24 pm

What aftermarket goodies do you have under the bonnet?
M-m
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This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


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GlennyGills
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Re: Idle Speed Setting

Postby GlennyGills » Wed Jan 06, 2016 1:53 pm

I have replaced the cone filter and gone back to the standard air box, in addition , I have a MX5 Parts S/S manifold and exhaust. Before I put the original air box back, I had the same problem.
We did try timing to 14 degrees but forgot the jumper and it was running as rough as anything on idle. I put the jumper in and returned the timing back to my original 10 degrees mark. I have not checked the timing with a light, just returned to a previous mark I made on the CAS.
'96 Gleneagles MeisterR Coilovers - engine bling stainless mx5parts full exhaust
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Lazza
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Re: Idle Speed Setting

Postby Lazza » Thu Jan 14, 2016 10:30 pm

Was the engine at full temperature? (i.e. fan cutting on/off).
Did you make sure the ignition timing was set correctly?
Lazza

2001 Mk2.5 MX5 1.8 Sport
Hard Dog Deuce
GAZ Gold Pro
Mk3 seats
17” OZ Racing Superturissmo wheels (for the toad)
15” Rota Circuit 10 wheels (for track use)
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Re: Idle Speed Setting

Postby GlennyGills » Fri Jan 15, 2016 1:20 pm

Hi Lazza,
I believe the timing to be correct, but as mentioned I don't have a light so cannot confirm. I previously made a mark at 10 degrees and returned to it. The engine was at normal temp. It is not a massive inconvenience. I was wondering if it was normal or what could be wrong.
'96 Gleneagles MeisterR Coilovers - engine bling stainless mx5parts full exhaust
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Re: Idle Speed Setting

Postby Lazza » Wed Jan 20, 2016 11:16 pm

I have an incredibly old and incredibly basic strobe light in Finchampstead. If you want to pop over some time we could give it a look over.
Lazza

2001 Mk2.5 MX5 1.8 Sport
Hard Dog Deuce
GAZ Gold Pro
Mk3 seats
17” OZ Racing Superturissmo wheels (for the toad)
15” Rota Circuit 10 wheels (for track use)
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GlennyGills
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Posts: 629
Joined: Tue Jul 10, 2012 8:13 pm
Location: Reading

Re: Idle Speed Setting

Postby GlennyGills » Thu Jan 21, 2016 7:15 pm

Pm sent..
'96 Gleneagles MeisterR Coilovers - engine bling stainless mx5parts full exhaust

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