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Old 09-08-2007, 06:30 PM   #1
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Default Ignition Trouble?

Here is my dyno from today, I'm thinking coil packs are the issue with the noisy chart and screwy AFR... any ideas?

- Greddy Kit @ ~6psi
- Stock exhaust and dp
- No AFPR
- Toyota green 315cc injectors
- Emanage Blue
- OG's Autotune
- Greddy Profec Spec B EBC
- Starion IC
- Colder plugs, 8.5mm wires


Last edited by manstretch; 09-08-2007 at 06:32 PM. Reason: .
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Old 09-08-2007, 06:39 PM   #2
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Typicall of dynojets, that pick up rpm signal, from the plug wires. The afr might be a screwed up Wideband on the dyno unless you where detonating.
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Old 09-08-2007, 06:47 PM   #3
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Well, I was getting hesitation/bucking randomly while under load, the AFR just kept going back and forth... we thought it seemed like an ignition problem.
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Old 09-08-2007, 06:58 PM   #4
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02 clamp
issue
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Old 09-08-2007, 08:57 PM   #5
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Quote:
Originally Posted by magnamx-5 View Post
02 clamp
issue
What with the o2 clamp exactly?
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Old 09-08-2007, 09:56 PM   #6
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obviusly you are cycling between closed and open loop i bt if yu just pulled the sensor you would run alot more even and be richer to boot.
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Old 09-08-2007, 09:59 PM   #7
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Pulled the sensor? I still don't understand why it would oscillate?
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Old 09-10-2007, 11:21 AM   #8
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Ok guys, make sure your spark plugs are tightened all the way.
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Old 09-10-2007, 11:57 AM   #9
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Are you saying your plugs were falling out?
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Old 09-10-2007, 01:12 PM   #10
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If it was just loose plugs i am gonna be pissed.
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Old 09-11-2007, 09:09 AM   #11
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There's a dyno in Durham ?? I'm in Chapel Hill and was under the impression the only dyno in 50miles was in Raleigh at Phantasm (err Ricers R Us - it's a civic shop primarily)... We should catch up somtime man - love to meet other miata folks in the area :-)
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Old 09-19-2007, 08:32 PM   #12
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Yes, all of my plugs were loose. Tightened them up and it's better, but still not perfect... I'm still getting some slight misfiring, so I bought another set of coils on ebay. We'll see if that helps any.
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Old 09-19-2007, 09:35 PM   #13
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Might want to change the plugs and wires while you're at it to remove any other variables as well. It would be cheap assurance.
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Old 09-19-2007, 10:32 PM   #14
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cop ftw! =)
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Old 10-07-2007, 11:38 PM   #15
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Changed coils and wires, plugs are less than a year old... not much difference. Gonna change the fuel filter next, but I'm not expecting it to change much. How reliable is the stock fuel pressure regulator? Any chance that could be my problem?
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